JPH11318877A - X-ray diagnosing device using x-ray plane detecting instrument and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray diagnosing device provided with a plane detecting instrument by which radiography and fluoroscope are flexibly executed. SOLUTION: Image element data in a part of an area in the plane detecting instrument 7 are obtained and displayed. For example, image element data of the area which is irradiated with an X-ray are obtained and displayed. The area with the irradiation of the X-ray is predicted by the opening degree of an X-ray conversion 5 and a distance from the X-ray conversion to the plane detecting instrument 7. Besides, it is judged by the value of image element data of the instrument 7. The area of an examinee is also judged from the value of image element data. Therefore, the image corresponding to the whole instrument 7, the image corresponding to the X-ray irradiation area or the image corresponding to the examinee area is displayed in a display device 21. Resolution at the time of obtaining image element data is changed in accordance with the size of the area of the instrument where image element data are obtained and in accordance with the processing resolution of the image processing means of a successive stage. The area to be flexibly observed is followed especially in the case of the X-ray diagnosing device having a bi-plane configuration 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an X-ray diagnostic apparatus using an X-ray flat panel detector and a control method of the X-ray diagnostic apparatus.

[0002]

2. Description of the Related Art In the field of X-ray diagnostic imaging, I.D. I. (Image Intensifier)-TV systems have become widely used. I. I. -The TV system has no waiting time for development like a silver halide film, can perform X-ray image diagnosis immediately, can perform not only radiography but also real-time fluoroscopy, and converts images into digital data through video capture. There are advantages such as easy management, storage, transfer, and copying of images.

FIGS. 36 (a) and 36 (b) show such I.D.
I. FIG. 1 is a diagram illustrating a conventional X-ray diagnostic apparatus employing a TV system.

In this X-ray diagnostic apparatus, an X-ray source 100
Irradiates the subject with X-rays and transmits an X-ray image obtained through the subject. I. At 101, the image is converted into an enhanced optical image. This optical image is captured by the television camera 103 via the optical system 102, subjected to predetermined image processing by the image processing unit 104, and supplied to the monitor device 105. Thus, the X-ray image can be observed via the monitor device 105.

[0005] Such an X-ray diagnostic apparatus is disclosed in I. I. 10
The magnification of the X-ray image can be changed inside 1. Specifically, I.I. I. When it is desired to observe the entire X-ray image radiated on the input surface 101, as shown in FIG. I. 101 is controlled by controlling an electron lens provided inside the I. 101. I. An image is formed as an optical image on the output surface 101. In addition, I. I. When it is desired to observe a part of the X-ray image irradiated on the input surface 101, FIG.
The electron lens is controlled as shown in FIG.
The line image is I. I. An image is formed as an optical image on the output surface 101.

As described above, the I.I. I. X provided with 101
In the X-ray diagnostic apparatus, the magnification of the X-ray image can be changed by an electronic lens. In addition, I. I. By narrowing the observation region of the X-ray image radiated on the input surface 101, a high-resolution optical image can be easily obtained.

I. I. -The size of the shooting area of the TV system I. In response to the demand for the enlargement of the imaging area, it has been manufactured up to about 16 ″. However, when the diameter of the II is increased, not only the imaging area but also the depth of the detection system is increased. And thus the weight is inevitably increased, making the X-ray diagnostic apparatus difficult to use.
Due to the tube configuration, its life is short.

[0008] Such I. I. In order to compensate for the shortcomings of the TV system, an X-ray diagnostic apparatus using a thin X-ray flat panel detector is promising.

An X-ray flat panel detector detects an X-ray projected on a plane.
The detector is capable of reading a line intensity distribution as data for each pixel. There are two types of X-ray flat panel detectors: an indirect type that converts X-rays into a wavelength of light that can be detected by a photoelectric conversion element using a fluorescent substance, and a type that uses a semiconductor such as selenium. It is classified as a direct type that directly detects X-rays. Both types of X-ray flat panel detectors are manufactured by applying microfabrication technologies such as semiconductor manufacturing technology and liquid crystal panel manufacturing technology.
A panel having a size of about cm × 40 cm can be manufactured.

[0010]

However, in emergency medical care such as accidents and disasters, X-ray photography is often used to grasp the condition of patients. In the conventional X-ray diagnostic apparatus, since the imaging region is relatively small, even in the case of urgent X-ray imaging, positioning is performed so that the region of interest falls within the imaging region, or a large number of images are taken to image the entire region of interest. I had to shoot.

However, in the conventional X-ray diagnostic apparatus, when the X-ray source and the X-ray detector are mechanically connected, the X-ray detector is located at the position where the X-ray is irradiated. For this reason, it is necessary to perform position detection and position control, and there has been a problem that it takes time and effort for positioning.

Further, in the conventional X-ray diagnostic apparatus,
When the X-ray source and the X-ray detector are not mechanically connected, to position the detector at the position where the X-ray is irradiated,
It is necessary to determine the position by performing several pre-irradiations, and in addition to the above-mentioned problems, there is a problem that the amount of X-ray exposure increases.

Further, X-rays using a large-field X-ray flat panel detector
In the case of the X-ray diagnostic apparatus, since all pixel data of the X-ray detector is collected, it takes time to collect data, and it takes time and time to extract and display data including the affected part from the collected data. There was a problem that it was troublesome and high-speed detailed imaging was impossible.

From another viewpoint, the X-ray diagnostic apparatus includes:
Observation of a wide area with relatively low spatial resolution,
It is required to satisfy two requirements, that is, observation can be performed with high spatial resolution in a small area. In order to satisfy these two requirements, it is sufficient to provide an X-ray flat panel detector having as high a spatial resolution as possible and a field of view as large as possible.

However, when such an X-ray flat panel detector having a high spatial resolution and a large field of view is used, the amount of data per frame output from the X-ray flat panel detector becomes extremely large, and image processing at the subsequent stage is performed. This causes a disadvantage that the circuit is burdened. In particular, when collecting data of an X-ray moving image (for example, 30 frames / second), it is necessary to transfer and process the data at a very high data rate, which is an expensive device as a signal transmission system and a signal processing system. It is necessary to provide.

In the area of X-ray image diagnosis, angiographic examination (angiography) is important for diagnosis of the circulatory system such as the heart and the vascular system. In this angiography test, a tube called a catheter is inserted into a blood vessel near the target arterial site of the subject under fluoroscopy,
X-ray contrast agent is injected into the blood vessel through this catheter,
This is a diagnostic method in which an X-ray contrast agent flowing in a blood vessel is imaged at high speed by an X-ray diagnostic apparatus, and the state of blood flow in the blood vessel is clearly imaged.

Such an examination is performed particularly for a circulatory disease such as myocardial infarction or cerebral infarction, and is performed in a relatively clean laboratory because a tube is inserted into a blood vessel. Here, the subject lies on the catheter bed and several surgeons and assistants stand around the subject. Further, an X-ray source for obtaining an X-ray image and an X-ray TV device (hereinafter referred to as X-ray TV chain) are provided on the immediate side of the subject.
A pair or two pairs are arranged (see FIG. 37).

In such an environment, in order to improve the access to the subject, a support for supporting the X-ray tube and the X-ray TV device may be provided, if necessary, on the head side of the subject. Approach is made from various angles such as the foot side, the right hand side, the left hand side, etc. (see FIG. 38).

Conventionally, as an X-ray TV system, I.P. I. -When using a TV camera, I. Even if the direction of approach to the subject changes, I. I. Since the image formed by the TV system is circular, the image data is kept in a fixed direction by rotating the image by image processing, for example.

However, when the X-ray flat panel detector is used in the X-ray diagnostic apparatus, if the direction of insertion of the support into the subject changes, the X-ray flat panel itself fixed to the support becomes
With respect to the subject, they are arranged in different directions depending on the insertion direction.

For this reason, if the X-ray detector itself has a square shape, the corners move with respect to the subject in accordance with the orientation of the support, and the subject may be disturbed. There was a problem of giving a sense of anxiety that a collision might occur.

Further, even when the same part is imaged, there is a problem that the direction of the image displayed on the monitor changes depending on the direction from which the X-ray-TV chain is inserted into the subject.

Conventionally, in a cardiac catheter examination, since it is necessary to spatially follow complicated blood vessel travel, it is common to perform fluoroscopy with a biplane examination apparatus.

This biplane inspection apparatus is a floor-standing X
A C-arm holding device (F: frontal holding device) which is a X-ray diagnostic device and an Ω arm holding device (L: lateral holding device) which is an installation type (ceiling hanging type) X-ray diagnostic device are used at the same time. By performing “perspective” in which a small amount of X-rays are continuously emitted from each holding device to obtain an X-ray moving image, two-dimensional fluoroscopic images are simultaneously obtained.

FIG. 39 is a schematic view of a conventional biplane operation for an angiography test, and FIG. 40 shows respective perspective images of the frontal holding device and the lateral holding device obtained by the biplane operation.

The positioning of the angiographic examination is performed by setting the C-arm 201 of the frontal holding device (F) to RAO30.
°, LAO the Ω arm 200 of the lateral holding device (L)
This is the case where the angle is set to 60 °.

Although the required field of view for a cardiac catheter examination is 9 inches, a high-quality X-ray image capable of visually recognizing stenosis of a blood vessel and the tip of a thin catheter is required, so that an image intensifier ( With the field of view switching function of II), close-up fluoroscopy is performed in a 6-inch enlargement mode.

In the cardiovascular angiography using such a frontal holding device (F) and a lateral holding device (L), the subject cannot be placed in a 6-inch visual field. The two holding devices of the table top 202, the frontal (F) 201, and the lateral (L) 200 are operated to follow the flow of the contrast agent. Although FIG. 40 shows both the 9-inch visual field and the 6-inch visual field, the fluoroscopic image actually displayed on the monitor is a 6-inch visual field.

The operation procedure for following the flow of the contrast agent in the fluoroscopic field is as follows.
At the same time as sliding control in the direction of the middle arrow A (right direction),
The Ω arm 200 of the lateral holding device (L) is controlled to move in the direction of arrow B (upward) in FIG. As a result, FIG.
As shown in the figure, the fluoroscopic image of the frontal holding device (F)
The image at the center of the screen is displayed in a shifted left direction, and the perspective image of the lateral holding device (L) is displayed as the image in the center of the screen is shifted to the right.

Next, the table top plate 202 is slid in the direction of arrow C (head direction) in FIG. As a result, as shown in FIG. 40, as a perspective image of the frontal holding device (F), the end of the blood vessel outside the field of view is displayed by the slide movement control of the table top 202, and the perspective view of the lateral holding device (L) is displayed. As an image, the blood vessel end region outside the visual field is displayed.

Such an operation is performed while observing each fluoroscopic image (DSA image) displayed on the monitor in real time,
It follows the contrast medium flowing through the cardiovascular.

However, in such a cardiovascular imaging test,
It is necessary to follow the flow of the contrast medium by operating two holding devices, the table top, the frontal holding device, and the lateral holding device on which the subject lies. This operation is extremely complicated and requires skill, and it is difficult for one operator to operate the frontal holding device and the lateral holding device in two directions in a complex manner. There is a problem that a dedicated operator (a total of two operators) is required for each operation of the holding device.

In view of the above problems, an object of the present invention is to provide an X-ray diagnostic apparatus that can be used in a clinical setting, especially in the case of emergency, without the need for complicated setting and instantly and easily obtain an X-ray image. It is an object of the present invention to provide an X-ray diagnostic apparatus which can perform both imaging and fluoroscopy.

Another object of the present invention is to provide an X-ray diagnostic apparatus using a large-field, high-resolution X-ray flat panel detector.
It is an object of the present invention to provide an X-ray diagnostic apparatus capable of flexibly performing image processing by changing the resolution according to the size of an observation area for an X-ray flat panel detector.

Still another object of the present invention is to provide an X-ray diagnostic apparatus using an X-ray flat panel detector, in which the X-ray-detector system is inserted from any direction of the subject. The present invention provides an X-ray diagnostic apparatus that does not cause anxiety to the user and enables an observed image to always face a certain direction.

Still another object of the present invention is to provide an X-ray diagnostic apparatus capable of improving operability and enabling one operator to sufficiently follow the flow of a contrast agent or the like. It is to be.

[0037]

In order to achieve the above object, the present invention provides an X-ray source for irradiating X-rays,
An X-ray, comprising: a plane detector for detecting X-rays emitted from a radiation source; and collection processing means for collecting and processing pixel data of an arbitrary region detected by the plane detector. The gist is a diagnostic device.

In particular, the acquisition processing means includes a pixel corresponding to an X-ray irradiation area determined based on at least an opening degree of the aperture of the X-ray source and a distance between the X-ray source and the flat panel detector. Collect data.

Further, in particular, the X-ray diagnostic apparatus of the present invention further comprises a subject area discriminating means for discriminating and extracting pixel data corresponding to the subject area from the pixel data corresponding to the X-ray irradiation area. Prepare.

According to another aspect of the present invention, there is provided an X-ray source for irradiating X-rays, a flat detector for detecting X-rays emitted from the X-ray source, and a flat detector. Irradiation area detection means for detecting an X-ray irradiation area based on the pixel data of the above, an object area detection means for detecting an object area in the X-ray irradiation area, a display means, an all-pixel display mode, Setting means for setting an irradiation area display mode or an object area display mode, and displaying an image based on all pixel data on the display means when the all pixel display mode is set, wherein the irradiation area display mode Is set, the image based on the pixel data corresponding to the X-ray irradiation area is displayed on the display means, and based on the pixel data corresponding to the subject area when the subject area display mode is set. Picture The X, characterized in that it comprises a display control means for controlling so as to display on said display means
The gist is a line diagnostic device.

In order to achieve the above object, the present invention provides an X-ray source having an X-ray source for irradiating an object with X-rays, and a flat detector for detecting the X-rays emitted from the X-ray source. In the control method of the X-ray diagnostic apparatus, a first X-ray is radiated by the X-ray source, pixel data is read from the flat detector, and X-rays are read on the flat detector based on the read pixel data. Detects an area irradiated with, selects an area where pixel data is to be collected from the flat panel detector based on the detection result, stores information on the area where the image data is to be collected, and The gist of the present invention is a control method for an X-ray diagnostic apparatus, wherein a second X-ray irradiation is performed, and pixel data is read from the flat panel detector based on information of a stored area.

In order to achieve the above object, the present invention provides an X-ray source having an X-ray source for irradiating an X-ray to a subject, and a flat detector for detecting the X-ray emitted from the X-ray source. In the control method of the X-ray diagnostic apparatus, a first X-ray irradiation is performed by the X-ray source, pixel data is read from the flat detector, and an object on the flat detector is determined based on the read pixel data. Is detected, a region where pixel data is to be collected from the flat panel detector is selected based on the detection result, information on the region where the image data is to be collected is stored, and the X-ray source stores The gist of the present invention is a control method of an X-ray diagnostic apparatus, which performs the X-ray irradiation of No. 2 and reads out pixel data from the flat panel detector based on information of a stored area.

In order to achieve the above object, the present invention provides an X-ray source for irradiating X-rays, an X-ray stop for limiting an X-ray irradiation area, and an opening degree of the X-ray stop. Opening degree setting means, a plane detector for detecting X-rays emitted from the X-ray source through the X-ray aperture, and image processing for inputting and processing pixel data detected by the plane detector Means, the value of the pixel data adjacent to the plane detector to one value according to the size of the irradiation area for the plane detector determined by the opening setting means and the processing resolution of the image processing means. Control means for controlling the flat panel detector so as to be collectively input to the image processing means.

In particular, when the resolution of the pixel of the flat detector corresponding to the size of the irradiation area is higher than the processing resolution of the image processing means, the control means determines the value of adjacent pixel data. The plane detector is controlled so as to be collected into one value and input to the image processing unit, and the resolution of the pixel of the plane detector corresponding to the size of the irradiation area is determined by the processing resolution of the image processing unit. If it is lower, the plane detector is controlled so that pixel data corresponding to the processing resolution of the image processing means is directly input to the image processing means.

In order to achieve the above object, the present invention provides an X-ray source for irradiating X-rays, an X-ray stop for limiting an X-ray irradiation area, and an opening of the X-ray stop. Opening setting means, a plane detector for detecting X-rays emitted from the X-ray source via the X-ray aperture, and an area setting for setting a size of an area of the plane detector for reading out pixel data. Means, image processing means for inputting and processing pixel data detected by the plane detector, size of an irradiation area for the plane detector determined by the opening degree setting means, and processing of the image processing means According to the resolution and the size of the area set by the area setting means, the plane detector is configured such that values of adjacent pixel data of the plane detector are combined into one value and input to the image processing means. Control hand to control the detector X, characterized in that it comprises a and
The gist is a line diagnostic device.

In order to achieve the above object, the present invention provides an X-ray source for irradiating X-rays, first and second X-ray stops for limiting an X-ray irradiation area, Opening setting means for setting the opening of the X-ray stop, a flat detector for detecting X-rays emitted from the X-ray source through the first and second X-ray stops, and pixel data. Area setting means for setting the size of the area of the plane detector to be read, and setting the degree of opening of the second X-ray aperture based on the size of the set area; Image processing means for inputting and processing pixel data, and according to the size of the irradiation area with respect to the plane detector determined by the opening degree setting means and the area setting means, and the processing resolution of the image processing means, Combine the values of adjacent pixel data of the flat panel detector into one value And gist X-ray diagnostic apparatus characterized by comprising a control unit for controlling the flat panel detector as input to the image processing unit Te.

In order to achieve the above object, the present invention provides an X-ray source for irradiating X-rays, an X-ray stop for limiting an X-ray irradiation area, and an opening of the X-ray stop. An opening setting means for detecting an X-ray emitted from the X-ray source through the X-ray aperture, and having a high-resolution detection element in the center and a low-resolution detection element in the periphery. A detector, image processing means for inputting and processing the pixel data detected by the plane detector, and detecting the low-resolution detection of the size of the irradiation area with respect to the plane detector determined by the opening degree setting means. If smaller than the size of the element area, the plane detector is controlled so that the pixel data detected by the high-resolution detection element is directly input to the image processing means, and the aperture setting means The plane to be determined When the size of the irradiation area for the output device is larger than the size of the area of the low-resolution detection element, the pixel data detected by the low-resolution detection element and the pixel data detected by the high-resolution detection element are detected. And a control unit that controls the flat panel detector so that pixel data is grouped for each adjacent data and input to the image processing unit.

In order to achieve the above object, the present invention provides an X-ray source for irradiating X-rays, a plane detector for detecting X-rays emitted from the X-ray source, and reading out pixel data. Operating means for moving the area of the plane detector in real time, and control means for controlling to read pixel data of the area corresponding to the moving operation by the operating means from the plane detector, The gist is the characteristic X-ray diagnostic apparatus.

In particular, the X-ray diagnostic apparatus of the present invention comprises a frontal X-ray source and a lateral X-ray source, a frontal flat detector and a lateral flat detector, a frontal operating means and Operation means for lateral,
The control means reads out pixel data of an area corresponding to the movement operation by the frontal operation means from the flat detector for frontal, and reads the pixel data of the area according to the movement operation by the lateral operation means. Control is performed so as to read out from the horizontal plane detector.

Further, in particular, when one of the frontal operation means and the lateral operation means is operated, the control means operates the pixel data of the area corresponding to the moving operation by the operated operation means. Is read from the corresponding plane detector, the other operation means is determined to move in conjunction with the operated operation means, and control is performed so as to read pixel data from the corresponding plane detector.

In order to achieve the above object, the present invention provides an X-ray source for irradiating X-rays, a plane detector for detecting X-rays emitted from the X-ray source, and reading out pixel data. Storage means for storing a movement pattern of the area of the plane detector in advance, and control means for controlling to read out pixel data from the plane detector based on the movement pattern stored in the storage means. The gist is an X-ray diagnostic apparatus characterized by the following.

In order to achieve the above object, the present invention provides an X-ray source for irradiating X-rays, a plane detector for detecting X-rays emitted from the X-ray source, Area is divided into a plurality of areas, and a change in the value of pixel data in each area is detected to determine a moving area from which pixel data is to be read. Control means for controlling the pixel data to be read from the flat panel detector based on the result.

Further, in order to achieve the above object, the present invention provides an X-ray source for irradiating X-rays, a flat detector for detecting X-rays emitted from the X-ray source, Holding means for holding the flat panel detector and the X-ray source facing each other, and holding the flat panel detector rotatably; and detecting a rotation angle of the holding means with respect to the subject. Control means for controlling the angle of the flat panel detector with respect to the holding means, so that the angle of the flat panel detector with respect to the subject is always constant, and an X-ray diagnostic apparatus comprising: I do.

[0054]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a first embodiment of the X-ray diagnostic apparatus according to the present invention.
FIG. 3 is a block diagram illustrating a configuration of the embodiment.

In FIG. 1, an X-ray diagnostic apparatus 1 includes an X-ray tube 3 serving as an X-ray source for irradiating an X-ray toward a subject P.
An X-ray diaphragm 5 for limiting an X-ray irradiation area;
An irradiation area presentation device 6 that irradiates the guide light to a position where the upper X-ray is to be irradiated, and an X-ray plane detector 7 that detects X-rays
A tube / aperture control unit 9 for controlling the irradiation from the X-ray tube 3 and the diaphragm 5; a detector I / F 11;
, A CPU 15, a LAN / I connecting the X-ray diagnostic apparatus 1 to an external medical image observation apparatus, a medical database, etc.
/ F 17, a bus 19, a monitor 21 for displaying an X-ray image and a control screen, a mouse 23 as an input means for inputting control information, an image memory 25, and storing a still image or a moving image and a control program. High-speed disk 27,
A digital VTR 29 for recording and reproducing moving images is provided.

The X-ray flat panel detector 7 is, for example, 40 cm × 40
It has an imaging area of cm and is installed below a top plate (not shown) on which the subject P is placed.

The X-ray flat panel detector 7 is, for example, an indirect conversion type X-ray flat panel detector for converting an X-ray image into an optical image and detecting the converted image. More specifically, FIG. As shown in the figure, an X-ray detecting element including each pixel 31 and each TFT 32 is two-dimensionally arranged in an array. Note that, in this example, an indirect conversion type X-ray flat panel detector is provided as the X-ray flat panel detector 7. An X-ray flat panel detector of another detection method such as a direct conversion type X-ray flat panel detector for conversion may be provided.

That is, the X-ray flat panel detector 7 includes a phosphor that converts an X-ray image into a visible optical image (visible light), and a plurality of pixels that sense the visible light and form charges corresponding to the amount of incident light. 31 and a plurality of thin film transistors 32 (T
FT).

As shown in FIG. 2B, each pixel 31 senses visible light and forms a charge according to the amount of incident light, and a capacitor 31a which accumulates the charge formed by the photodiode 31b. (Storage capacitor).

The connection point between the cathode terminal of the photodiode 31b and one terminal of the storage capacitor 31a is connected to the power supply line 35 (35-1, 35-2,...) Shown in FIG.
35-n) to the reverse bias power supply (-Vn), and the connection point between the anode terminal of the photodiode 31b and the other terminal of the storage capacitor 31a is the TFT 32
Connected to the source terminal.

The gate terminal of the TFT 32 is connected to each scanning line 33.
(33-1, 33-2,..., 33-n) are connected in common for each row, and are connected to each scanning line terminal of the scanning line driving unit 34. A drain terminal of the TFT 32 is commonly connected to each column by a signal line 36 (36-1, 36-2,..., 36-n). 1,38-
2... 38-n.

Here, the pixel 3 will be described in more detail.
An X-ray detecting element composed of a TFT 1 and a TFT 32 is provided with a gate electrode 51 on a TFT region 46 on a support 45 as shown in FIG.
Is formed, and a SiNx layer 52 is laminated thereon. On the SiNx layer 52 on the TFT region 56, an i-type amorphous silicon layer 53 (i-type a-si
), And a drain electrode 55 and a source electrode 56 are formed thereon via an n + a-Si layer 54, thereby forming a TFT 32.

In the PD area 47 on the support 45,
N + a connected to the SiNx layer 52 and the source electrode 56
-Si layer 62 is laminated thereon, and an n + a-Si layer 5
7, the ia-Si layer 58, and the p + a-Si layer 59 are sequentially stacked to form a photodiode 31b having a Pin structure.

Next, a first polyimide resin layer 61 is laminated on the TFT 32 and the photodiode 31
The transparent electrode 60 is provided on b. Each photodiode 31 is provided on the first polyimide resin layer 61.
A metal electrode 62 for connecting the b transparent electrodes 60 is provided.

On the transparent electrode 60 and the metal electrode 62, a second polyimide resin layer 63 is laminated. This second
On the polyimide resin layer 63, a transparent protective film 50, a phosphor 49, and a light reflection layer 48 are sequentially connected.

X-ray flat panel detector 7 having such a configuration
In, when X-rays transmitted through the subject enter, the visible light is reflected by the light reflection layer, and only the X-rays pass through the light reflection layer and enter the phosphor 49. The energy of this incident X-ray is converted into light energy (visible light) by the phosphor 49, and this visible light passes through the transparent protective film 50 and the second polyimide resin layer 63, and further passes through the transparent electrode 60 into visible light. Is received by the photodiode 31b having a high sensitivity.

The photodiode 31b forms a charge proportional to the light energy, and supplies the charge to the storage capacitor 31a. The charge stored in the storage capacitor 31a is read out as an image signal in pixel units for each line via the scanning line 33. Since the read image signal is proportional to the energy of the X-ray, the read image signal is supplied to the CPU 38 via the multiplexer 38.
15 for video processing, etc.
An X-ray image can be obtained by supplying it to 1.

In the main memory 13, a control program of the X-ray diagnostic apparatus 1 is read from the high-speed disk 27 and stored. The control program includes an irradiation area detecting section 13a and a display area which are essential points of the present invention. A selection unit 13b is included.

When performing X-ray photography or fluoroscopy with the X-ray diagnostic apparatus 1 of the present embodiment, the X-ray tube 3 is viewed while the guide light emitted from the irradiation area presentation device 6 onto the subject P is viewed. The X-ray irradiation area is set by adjusting the position and the degree of opening of the X-ray diaphragm 5. Next, a control screen is displayed on the monitor 21,
By specifying an icon on the control screen with the mouse 23, shooting conditions such as a tube voltage, a tube current, and an exposure time are set. In particular, when the photographing is urgent, the photographing condition can be set by selecting an appropriate condition from a plurality of preset standard photographing conditions.

Next, when X-ray irradiation is instructed from the control screen of the monitor 21, the CPU 15 resets the X-ray flat panel detector 7 via the detector I / F 11 and stores the amount of electric charge accumulated in each pixel. Is set to a predetermined value, and X-ray irradiation is performed from the X-ray tube 3 via the tube / aperture control unit 9 (step S11) (hereinafter, refer to FIG. 4). When the irradiation time set in the imaging condition ends, the irradiation from the X-ray tube 3 ends.

The X-ray tube 3 is supplied with a high voltage for X-ray irradiation from a high voltage generator (not shown).
Under the control of the tube / aperture control unit 9, the voltage value of the high voltage supplied from the high voltage generator to the X-ray tube 3, the same current value,
The energization time is controlled. Further, the detector I / F 11 and the tube / aperture control unit 9 may be a wired connection or a wireless connection.

After the X-ray irradiation is completed, electric charges are generated in the pixels irradiated with the X-rays of the X-ray flat panel detector 7, but the electric charge amount of each pixel is detected for all the pixels via the detector I / F11. Is read, A / D converted, and stored in the image memory 25 (step S13).

Next, with reference to the pixel values read into the image memory 25, the irradiation area detecting section 13a determines the area irradiated with the X-rays of the X-ray flat panel detector 7 (step S15). This specific determination method will be described later. If there is no irradiation area in this determination, a message indicating that there is no image is displayed (step S21), and the process ends.

When the position and size of the illuminated area are determined, the display area selecting unit 13b determines an area to be displayed (step S19), and adjusts an image corresponding to the area to be displayed on the monitor screen. To zoom in / out (Step S
23), and displays this image on the monitor 21 (Step S)
25). The display area selection unit 13b includes an all-pixel display mode,
It has three display modes, an irradiation area display mode and a subject area display mode, and is configured so that the mode can be selected by operating the operation panel.

In the all-pixel display mode, the X-ray flat panel detector 7
Is displayed on the monitor screen as a display area.
In the irradiation area display mode, a display area obtained by adding an appropriate margin to the X-ray irradiated area of the X-ray flat panel detector 7 is determined and displayed on the monitor screen. In the subject area display mode, an area in which an image of the subject is received on the X-ray flat panel detector 7 with an appropriate margin is determined as a display area, and displayed on the monitor screen.

The display area preferably matches the shape of the X-ray stop 5, and is usually a rectangular area.

FIGS. 7A to 7C conceptually show the area detecting function by the irradiation area detecting section 13a and the display selecting function by the display area selecting section 13b.

First, as shown in FIG. 7 (a), when all of the irradiation area is detected by the X-ray flat panel detector, in the all pixel display mode, it is displayed as it is as shown at the top, and the irradiation area display is performed. In the mode, only the irradiation area including the margin is enlarged and displayed as shown in the middle section, and in the object area display mode, only the object area including the margin is enlarged and displayed as shown in the lower section.

As shown in FIG. 7B, when only a part of the irradiation area is detected by the X-ray flat panel detector, it is displayed as it is in the all pixel display mode as shown in the upper part.
In the irradiation area display mode, only the irradiation area detected as shown in the middle section is enlarged and displayed, and in the object area display mode, only the detected object area as shown in the lower section is enlarged and displayed.

As shown in FIG. 7C, when the irradiation area is not detected by the X-ray flat panel detector at all, any one of the all pixel display mode, the irradiation area display mode, and the object area display mode is used. Mode, for example, "NO
IMAGE "is displayed.

FIG. 5 is a flowchart showing a detailed procedure for determining an irradiation area. First, before X-ray irradiation, pixel data of an image in a state where X-rays have not been irradiated is read out (step S101). Then, the maximum value of the normal pixel value excluding the abnormal value is selected (step S103), and based on the selected pixel value, for example, a value that is 1.1 times as large is set as a threshold value (step S105). .

Next, a boundary between the pixel data having a value exceeding the threshold value and the pixel data having a value not exceeding the threshold value is extracted based on all the pixel data (step S107), and a rectangle matching this boundary line is selected (step S107). S109). Then, an area inside the rectangle is set as an irradiation area (step S111). If a boundary exceeding the threshold value cannot be extracted in step S107, a flag indicating that there is no irradiation area is set, and is used in step S17 in FIG.

Note that the boundary line may be detected by differentiating the pixel data so that a portion where the result of the differentiation becomes a maximum is defined as the boundary line.

FIG. 6 is a flowchart showing a procedure for determining and displaying a subject area.

When the object region display mode is selected, first, the irradiation region determined by the irradiation region determination in FIG. 5 is input, one side of the irradiation region is selected, and its pixel data is read (step S121). ). Next, it is determined whether or not all pixel data on this side is at a high level (step S123). If all are at the high level, this side is outside the subject area, so the side is translated to the inside of the image until a low-level pixel appears (step S125). If it is determined in step S123 that a low-level pixel is included, this side is inside the subject area, and the process proceeds to step S127 without doing anything.

Next, in step S127, this side is translated outward by a predetermined margin. The predetermined margin is, for example, 2 to 3 cm on the X-ray flat panel detector.

Next, it is determined whether or not the processing on all four sides has been completed (step S129).
An unprocessed side is selected (step S131), and the process returns to step S123. If the processing on the four sides has been completed, the processing is terminated with this quadrilateral area as the display area.

FIGS. 8A to 8D show the operation of the irradiation area detection unit 13a and the display area detection unit 13b when the subject area display mode is set based on the specific X-ray imaging situation. FIG.

First, as shown in FIG. 8A, when the subject is in the X-ray irradiation area, the pixel values on the line AA 'of FIG. Figure 8
It is output as a value as in (b).

In FIG. 8B, the range where the pixel value is the highest is the irradiation area without the subject, and the valleys of the pixel values correspond to the bone and the backbone of the arm, respectively. First,
Since the pixel value outside the irradiation area of the X-ray flat panel detector 7 is a low-level pixel value due to only the scattered radiation, a point where the pixel value rises rapidly from this low level is determined as the boundary of the irradiation area. In this case, when the display area is determined in the subject area display mode, an area obtained by adding a predetermined margin from the end of the subject area, that is, a selection area shown in FIG. 8B is adopted.

Further, as shown in FIG. 8C, when the subject is out of the X-ray irradiation area, the pixel value on the BB ′ line is set to a value as shown in FIG. Is output.

In FIG. 8D, a pixel value corresponding to the subject is obtained inside the irradiation area, and only a low level pixel value due to scattered radiation is obtained outside the irradiation area. Therefore, also in this case, a point where the pixel value rises rapidly from this low level is determined as the boundary of the irradiation area. Further, in this case, when the display area is determined in the object area display mode, the area obtained by adding a predetermined margin from the end of the object area, that is, the irradiation area in this case, that is, the selection area shown in FIG. Adopted.

FIGS. 9A to 9D are diagrams for explaining how the area selected as the display area is enlarged or reduced in accordance with the monitor. The raw data of the area selected as the display area is, for example, as shown in FIG. In FIG. 9A,
16 pixel data D1, D2, D in a 4 × 4 square shape
3,..., D16 are shown.

As a display method, as shown in FIG. 9B, display is performed with the same number of pixels as the selected area. FIG. 9 (c)
As shown in (2), the display is enlarged to an integral multiple of the number of selected pixels within a range that fits in the monitor size. Alternatively, as shown in FIG. 9D, there is a display method such as averaging a plurality of continuous pixels and reducing the number of pixels to an integral multiple for display.

Next, a second embodiment of the present invention will be described.
FIG. 10 is a flowchart illustrating the operation of the second embodiment. In the present embodiment, the irradiation area determined based on the result of the pre-exposure or the preceding exposure is used to limit the reading area of the subsequent irradiation, and the reading of the pixel data from the X-ray flat panel detector is performed at high speed. FIG.

The overall configuration of the X-ray diagnostic apparatus according to this embodiment is the same as that of the first embodiment shown in FIG. 1, but the operations of the irradiation area detection unit 13a and the display area selection unit 13b are different.

In FIG. 10, first, the number of irradiations (n) is initialized n = 0 (step S41). Next, X-ray irradiation is performed (step S43), and the number of times of irradiation is updated (step S45). Next, it is determined whether or not the number of irradiations n is greater than 1 (step S47).

In this determination, at the time of the first exposure,
Since n = 1, the determination is NO, and then all pixel data is read from the X-ray flat panel detector (step S49),
An irradiation area is determined (step S51), a display area is selected (step S53), and this display area is stored (step S55).

The selection of the display area in step S53 is based on the first
As in the embodiment, the display area is selected based on the mode selected from the all-pixel display mode, the irradiation area display mode, and the subject area display mode.

Next, as in the first embodiment, the image in the display area is enlarged or reduced according to the size of the monitor screen (step S57), and this image is displayed on the monitor (step S59). Next, when the subject region display mode is selected and the non-subject region is a part of the irradiation region, the opening degree of the X-ray aperture is reduced so that only the display region is irradiated with X-rays. . Thus, the X-ray irradiation to the unnecessary area can be cut, and the exposure of the subject can be reduced. Next, it is determined whether or not the X-ray irradiation is completed (Step S6).
1) If not finished, return to step S43.

In the case of the second or subsequent X-ray irradiation, the determination in step S47 is YES, and the routine goes to step S63. In step S63, when reading the pixel data from the X-ray flat panel detector, only the pixel data within the display area stored in step S55 is read.

In this case, as shown in FIGS. 11A and 11B and FIGS. 12A and 12B, the processing time can be reduced.

To collect all pixel data,
As shown in FIG. 12A, collection / reading takes a time corresponding to the number of scanning lines. For example, assuming that the width of a control pulse for reading is 30 μs, if there are 1000 scanning lines, it takes 30 μs × 1000 = 30 ms to collect all pixel data.

On the other hand, as shown in FIG. 11A, it is assumed that only data of pixels corresponding to scanning lines i, i + 1,..., K-1, k are data to be collected. In this case, for an area that does not require data collection, a process of collectively discharging data may be performed. To do so, as shown in FIG. 12B, a read control pulse for the scanning lines 1 to i-1 is generated in the same time zone, and a read control pulse for the scanning lines k + 1 to n is generated in the same time zone. Just do it. As a result, the processing time can be reduced according to the area of the pixel from which data is to be read.

It is effective to discharge the electric charge of the pixel in the area where the data collection is not required through the Zener diode 64 to the power supply line as shown in FIG. When the bias voltage V _bias of the power supply line is set to a low level, the Zener diode 64 is opened and the electric charge is discharged. In this way, dielectric breakdown can be prevented and TF
It is possible to prevent electric charges from leaking to the signal line via T.

Although it is optimal to simultaneously discharge data in an area that does not require data collection as described above, a method of sequentially discharging data at a higher speed than an area that requires data collection may be used.

Returning to the description of the flowchart of FIG. 10, the margin of the image area from which the pixels are read is compared with a predetermined margin value (step S65). If the margin is larger than the predetermined value, the process proceeds to step S57 to enlarge / reduce the image. Proceed to display.

If the margin is smaller than or equal to the predetermined value, the flow shifts to step S49 to perform processing after reading all pixel data from the X-ray flat panel detector. This step S65
Is determined only when the irradiation region display mode is selected, whether to proceed to step S49 or S57, and when the all pixel display mode and the subject region display mode are selected, the determination is not performed. It is configured to proceed to S57.

With the above processing, pixel data readout of the X-ray flat panel detector for the second and subsequent X-ray irradiation data collections is performed only in the display area stored in advance unless the subject and the X-ray source are moved. , The reading time can be reduced. In addition, even when the subject or the X-ray source moves, the display area can be updated following the movement, so that the X-ray images collected by the X-ray flat panel detector must be Can be displayed. This also enables fluoroscopic examination.

FIGS. 13A to 13C are diagrams showing an example of determination as to whether or not the pixel data readout area for the subsequent X-ray irradiation is within the margin range. When pixel data is read from the X-ray flat panel detector with respect to the display area stored in advance, the irradiation area is within the range of the display area in the case shown in FIG. 13B, but in the case of FIG. The irradiation area is out of the display area.

FIGS. 14 (a) and 14 (b) are diagrams for explaining the main configuration of a third embodiment of the X-ray diagnostic apparatus according to the present invention. This shows an embodiment in which an irradiation area is predicted based on a distance and an aperture, and a data collection area is selected based on the prediction result.

In FIG. 14A, the X-ray flat panel detector 6
5 of the four corners is ultrasonic generator 68 _{1-68 4} are respectively provided. An X-ray head 66 containing an X-ray tube (not shown) and an X-ray aperture (not shown) is provided at the distal end of a free arm 67 having a plurality of rotatable joints. An ultrasonic receiver 69 having a wide range of directivity is provided below the side surface of the X-ray head 66.

[0114] The by ultrasonic receiver 69 measures the propagation delay time of each pulse by receiving the ultrasonic pulses emitted from the respective ultrasonic oscillator 68 _{1-68 4,} based on the the measured time and the speed of sound X-ray head 6
The distance between the X-ray detector 6 and the X-ray flat panel detector 65 can be calculated. At this time, if the room temperature is measured and the sound speed is corrected, a more accurate distance can be obtained.

Next, the X-ray provided in the X-ray head 66 is
The opening degree of the line stop is read out, and the irradiation area on the X-ray flat panel detector is calculated using the opening degree of the stop and the distance between the X-ray head and the X-ray flat panel detector obtained earlier.

Next, X-rays are emitted from the X-ray tube in the X-ray head. At this time, when the X-ray flat panel detector is not located at the position where the X-ray is irradiated, the irradiation may be suppressed and a warning may be issued to the operator. Further, a mechanism that irradiates the irradiable range with a visible light laser beam or the like and indicates which part of the subject can be imaged may be added.

In FIG. 14A, an example in which the ultrasonic transmitter is provided in the X-ray flat panel detector and the ultrasonic receiver is provided in the X-ray head has been described. As shown in (b), the ultrasonic transmitter 70 is provided in the X-ray head 66, and the ultrasonic receivers 711 to 714 are connected to the X-ray flat panel detector 65.
Obviously, the distance can be measured in the same manner even if the four corners are provided.

FIG. 15 is a diagram showing the geometry of the X-ray tube and X-ray stop in the X-ray head and the irradiation area of the X-ray flat panel detector. As shown in the figure, the irradiation area is uniquely determined by the positional relationship between the X-ray focal point and the X-ray flat panel detector, and the aperture.

FIG. 16 is a flowchart for explaining the operation of the third embodiment.

First, the relative position between the X-ray focal point and the X-ray flat panel detector is detected (step S81), and then the X-ray aperture is detected (step S83). The order of detecting the relative position and the opening degree of the throttle may be interchanged.

Next, an irradiation prediction area on the X-ray flat panel detector is calculated based on the detected relative position between the X-ray focal point and the X-ray flat panel detector and the aperture opening (step S8).
5). At this time, if the X-ray flat panel detector is not located within the range where the X-ray can be irradiated, a warning is issued and the operator is notified of the X-ray flat panel detector.
The position correction of the line plane detector may be prompted. Further, a function of irradiating an irradiable range with visible light and easily recognizing which part of the subject can be imaged may be provided.

Next, X-rays are emitted from the X-ray head (step S87), and only the pixel data of the X-ray flat panel detector included in the calculated irradiation prediction area is read out (FIG. 1).
1 (a) and the method shown in FIG. 12 (b) can be adopted) and stored in the image memory (step S89). Next, a display area is selected as in the first embodiment (step S90). In this display area selection, a display area is selected based on a mode selected from the irradiation area display mode and the subject display mode. Next, the image is enlarged / reduced (step S91) and displayed on the monitor (step S9).
3), end.

In the case of fluoroscopy, a moving image is shot by repeating steps S81 to S91. When the subject area display mode is selected, the opening degree of the X-ray aperture is reduced so that only the display area is irradiated with X-rays, thereby reducing the amount of exposure to the subject.

Next, a fourth embodiment of the present invention will be described.

In the present embodiment, a thin X-ray flat panel detector is provided fixedly or detachably on the entire surface of the bed, and this X-ray flat panel detector is combined with a separately movable X-ray apparatus for round-trip. The X-ray apparatus for the round examination includes an X-ray tube serving as an X-ray source for generating X-rays, a power supply for supplying required power to the X-ray tube, and image data obtained from the X-ray flat panel detector. Is processed and stored, and a control device for displaying on a display device is provided.

A bed equipped with such an X-ray flat panel detector can perform X-ray imaging without having to go to the X-ray imaging room, so that a patient with severe illness or a patient who has difficulty walking or moving can be moved. And X-ray imaging can be easily performed.

A single round X-ray apparatus can be used for a plurality of X-ray flat panel detectors, and can perform a large number of X-ray images.

According to each of the embodiments described above, it is unnecessary to set the relative position between the X-ray source and the X-ray detector and the position of the subject, and it is possible to easily generate the X-ray image without any trouble. There is an effect that it can be obtained.

In particular, in the case of emergency medical treatment, there is an effect that the number of humans for X-ray imaging can be reduced and an X-ray image can be obtained promptly.

Each of the above embodiments can be applied to both photographing and fluoroscopy.

Next, a fifth embodiment of the present invention will be described.

The X-ray diagnostic apparatus according to the fifth embodiment of the present invention is controlled so as to generate an X-ray with a large dose during imaging and generate an X-ray with a small dose during fluoroscopy, as shown in FIG. An X-ray tube 81, an X-ray aperture unit 82 for narrowing an X-ray irradiation area so that only the region of interest is irradiated with X-rays, and an X-ray image obtained by transmitting through an object are received. An X-ray flat panel detector 83 that converts the image signal into an image signal, and an image processing unit 84 that performs predetermined signal processing on the image signal from the X-ray flat panel detector 83 and supplies the processed signal to a monitor device 85. .

The X-ray diagnostic apparatus is operated by an operator to switch an X-ray aperture setting switch 86 for designating an X-ray exposure area, and to switch an X-ray dose according to the purpose of exposure. The X-ray tube 81 is controlled to control the opening width of the X-ray aperture unit 82 so as to be in the X-ray exposure area designated by the X-ray aperture setting switch 86. And a control unit 87 for controlling the readout area of the X-ray flat panel detector 83 in the first to third modes, which will be described later.

Next, the operation of the X-ray diagnostic apparatus according to the fifth embodiment having such a configuration will be described.

The X-ray flat panel detector 83 has the same configuration as that of the X-ray flat panel detector 7 shown in FIG.

In this description, the number of vertical and horizontal pixels of the X-ray flat panel detector 83 is 4000 pixels × 4000 pixels, and the processing capability of the subsequent image processing unit 84 is 1000 pixels.
The description will be made assuming that the pixel is 1000 pixels.

When obtaining an X-ray image, it is general to first find or measure a target portion by "perspective" and then obtain an X-ray image by "imaging". By following the general procedure for obtaining an X-ray image,
In FIG. 17, the operator designates fluoroscopy, and designates an area to be observed through the fluoroscopy with the X-ray aperture setting switch 86 (designation of an X-ray exposure area).

When an area to be observed through fluoroscopy is designated by the X-ray aperture setting switch 86, the control unit 87 controls the X-ray tube so as to continuously emit X-rays of a dose smaller than the dose at the time of imaging. The drive width of the X-ray aperture unit 82 is controlled so that the X-ray is emitted only to the designated area, and the X-ray corresponding to the designated X-ray exposure area is controlled.
The X-ray flat panel detector 83 is read and controlled to read a line image.

The specific operation will be described below.

The control section 87 changes the size of the X-ray exposure area by moving the X-ray aperture section 82 based on the input to the X-ray aperture setting switch 6. At this time, the control unit 87 sets the X-ray irradiation area set by the X-ray aperture area setting switch 86 as the observation area, and determines the operation mode based on the range of the observation area.

(First Mode) The control unit 87 determines whether the vertical length of the X-ray flat panel detector 83/2 <the vertical length of the observation area and the horizontal width of the X-ray flat panel detector 83. If length / 2 <the horizontal length of the observation area (or the area of the observation area is １ ／ to 1/1 the area of the imaging surface of the X-ray flat panel detector 83), Set mode 1. This first
In the mode (1), as shown in FIG. 18A, the X-ray flat panel detector 83 is controlled so as to read out an entire image of 4000 × 4000 pixels as a total of 16 pixels of 4 × 4 pixels as one pixel.

When reading a total of 16 pixels of 4 × 4 pixels of the X-ray flat panel detector 83 as one pixel, the control unit 87
Controls the TFT 32 provided for each pixel 31 simultaneously on four lines (rows) simultaneously via the scanning line driving unit 34 shown in FIG. As a result, the four lines of charges for which the TFT 32 has been turned on are simultaneously read out and added to the signal line 36 and supplied to the multiplexer 38 via the readout amplifier 37.

Next, the control unit 83
Switches 38-1 to 38-38 adjacent in the column direction
-4, 38-5 to 38-8... Are simultaneously turned on. As a result, the image signals of four signal lines are added, and the image signals of a total of 16 pixels of 4 pixels × 4 pixels are read as the image signals of one pixel.

More specifically, the control unit 37 first
A total of 4 of the scanning lines 33-1, 33-2, 33-3, 33-4
Each TFT 32 connected to the line is turned on.
As a result, the electric charges are read out onto the signal line 36 via the four TFTs 32, added, and supplied to the multiplexer 38. Next, the control unit 37 controls the four switches 38-1 to 38-38 adjacent to the multiplexer 38 in the column direction.
-4 are simultaneously turned on. As a result, the image signals of four signal lines are added, and the image signals of a total of 16 pixels of 4 pixels × 4 pixels are read as the image signals of one pixel.

Therefore, in the first mode, all the 4000 × 4000 pixels of the X-ray flat panel detector 3 are set to 1
It can be output as an image signal of 000 pixels × 1000 pixels. As described above, the processing capability of the image processing unit 84 at the subsequent stage of the X-ray flat panel detector 83 is 1000 pixels × 100
Since there are no pixels, by performing such readout control, even if the number of pixels of the X-ray flat panel detector 83 is large, the signal rate can be set within the processing capability range of the image processing unit 84.

Next, the image signal read out from the X-ray flat panel detector 83 is supplied to the subsequent image processing section 84 via the output terminal 39. The image processing section 84 performs predetermined image processing (video processing processing or the like) on this image signal, and supplies this to the monitor device 85. This allows
An X-ray image (perspective image) obtained from the entire area of the X-ray flat panel detector 83 can be displayed on the display screen of the monitor device 85.

(Second mode) The control unit 87 determines that the vertical length of the X-ray flat panel detector 83/2> the vertical length of the observation region> the vertical length of the X-ray flat panel detector 83 / 4 and X
When the horizontal length of the line flat detector 83/2> the horizontal length of the observation area> the horizontal length of the X-ray flat detector 83/4 (or the area of the observation area is X-ray (When the area is 1/16 to 1/4 of the imaging surface of the plane detector 83)
Set the mode of. In this second mode, FIG.
As shown in (b), a quarter of the entire area is an area in which the number of vertical and horizontal pixels is 2000 pixels × 2000 pixels. The control unit 87 reads and controls the X-ray flat panel detector 83 so as to read out the image of 2000 pixels × 2000 pixels as a total of 4 pixels of 2 pixels × 2 pixels.

When reading out a total of four pixels of 2 × 2 pixels of the X-ray flat panel detector 83 as one pixel, the control unit 87
Indicates that the scanning lines 33 corresponding to an image of 2000 pixels × 2000 pixels are simultaneously turned on two by two,
The switches adjacent to each other in the column direction of the multiplexer 38 corresponding to the image of 00 × 2000 pixels are simultaneously turned on two by two.

As a result, a total of 4 pixels of 2 pixels × 2 pixels can be read as one pixel, similarly to the above-described read control of 4 pixels × 4 pixels. Therefore, in the second mode, 2000 pixels × 200 pixels on the X-ray flat panel detector 83
An X-ray image of 0 pixels can be read out as an image signal of 1000 pixels × 1000 pixels.
Signal rate within the processing capability range. Further, since a total of 4 pixels of 2 × 2 pixels are read as one pixel, a fluoroscopic image four times higher in resolution than in the first mode can be obtained, and the image of the region of interest can be obtained. It can be observed in detail.

Next, if there is a region in the whole perspective image or the perspective image of the region of interest that is desired to be observed more finely, the operator operates the X-ray aperture setting switch 86 to set the region. An X-ray irradiation region is designated so that the X-ray is irradiated to the range of the region of interest.

(Third Mode) The control unit 87 determines whether the vertical length of the X-ray flat panel detector 83/4 ≧ the vertical length of the observation area and the horizontal length of the X-ray flat panel detector 83. When length / 4 ≧ length of the observation area in the horizontal direction (or when the area of the observation area is 1/16 to 1/4 of the imaging surface of the X-ray flat panel detector 83), Set the mode of 3. In the third mode, as shown in FIG. 18C, 1/16 of the entire area has 1000 pixels × 1
000 pixels.
The X-ray flat panel detector 83 is read out and controlled so that all the images of 000 pixels × 1000 pixels are sequentially read out one pixel at a time.

As described above, this X-ray flat panel detector 83
Has a multi-pixel configuration of 4000 pixels × 4000 pixels. Therefore, by directly reading out the X-ray image in the area of 1000 × 1000 pixels, the signal rate can be set within the processing capability range of the subsequent image processing unit 84, and a high-resolution fluoroscopic image can be obtained. it can. Specifically, in the third mode, a high-resolution fluoroscopic image 16 times higher than the first mode and 4 times higher than that of the second mode can be obtained, and the image of the region of interest is observed in more detail. be able to.

The reading control of the first to third modes in the control unit 87 is summarized as follows.
In the case of the “first mode”, all pixels of 4000 × 4000 pixels of the X-ray flat panel detector 83 are defined as one pixel of 4 × 4 pixels as shown in white in FIG. In the case of the “second mode”, the read operation is controlled, and as shown by the left diagonal line in FIG. 19, the 2000 × 2000 pixels in the area located at the center of the X-ray flat panel detector 83 are replaced by 2 × 2 pixels Read control is performed with a total of four pixels as one pixel,
In the case of the “third mode”, 1000 pixels × 10 pixels in the central region of the X-ray flat panel
The reading control is performed for the 00 pixels one by one.

As a result, the resolution can be selected according to the degree of observation, and the convenience of the X-ray diagnostic apparatus can be improved. In addition, some pixels are grouped into one
Since the readout control is performed as pixels, the image processing unit 84 in the subsequent stage is burdened by the readout image signal even though the X-ray flat panel detector 83 has a multi-pixel configuration and the spatial sampling frequency is increased. Without
The existing system can be applied as it is.

Next, when fluoroscopy is completed in each of these modes, the operator designates imaging of the part at an arbitrary timing. When this imaging is designated, the control unit 87 sends a large amount of X-rays for imaging to the subject so that the X-rays are emitted to the subject.
While driving the tube 81, the opening width of the X-ray aperture unit 82 is controlled to be fully open. As a result, an X-ray image including a region of interest, which is obtained by fluoroscopy, can be obtained from the entire region of the X-ray flat panel detector 83.

At the time of this photographing, the control section 87 reads out and controls the X-ray flat panel detector 83 with a total of 16 pixels of 4 pixels × 4 pixels as one pixel as in the first mode in the above-described fluoroscopy. Thus, a captured image of 1000 pixels × 1000 pixels can be supplied to the image processing unit 84, and the load on the image processing unit 84 can be reduced even at the time of shooting. The captured image via the image processing unit 84 is supplied to the monitor device 85 and displayed.

In the description of the fifth embodiment, since the image processing section 84 at the subsequent stage of the X-ray flat panel detector 83 has a processing capability of an image signal of 1000 × 1000 pixels, the X The number of pixels of the image signal read from the line plane detector 83 is unified in each mode so as to be 1000 pixels × 1000 pixels.
Pixels x 500 pixels, etc., or 1 in the first mode
000 pixels × 1000 pixels, 800 pixels × 800 pixels in the second mode, and 400 pixels × 400 in the third mode
Like a pixel or the like, it may be set arbitrarily within a range that does not exceed the processing capability of the image processing unit 84.

Although the first to third modes are provided, a total of three modes are provided. However, the three modes are the same as the first to fourth modes or the first to fifth modes. May be provided in addition to a plurality of modes.

In addition, since it is common for the operator to perform fluoroscopy so that the part that he or she wants to observe is located at the center of the screen, in the second and third modes, the operator is positioned at the center of the X-ray flat panel detector 83. The reading control is performed on the area of 2000 pixels × 2000 pixels or 1000 pixels × 1000 pixels. However, this may be performed by, for example, fixing and reading the area other than the center of the X-ray flat panel detector 83. Good (an aspect of reading an arbitrary area will be described in a seventh embodiment described later). Further, the reading control of the X-ray flat panel detector 83 in each mode is performed only at the time of fluoroscopy, but this may be performed at the time of imaging.

At the time of photographing, a total of 1 × 4 pixels × 4 pixels
Read control was performed with six pixels as one pixel.
At the time of this photographing, each pixel may be read out and controlled one by one. Instead, the frame rate may be reduced and used within the range of the processing capability of the subsequent image processing unit.

Next, an X-ray diagnostic apparatus according to a sixth embodiment of the present invention will be described.

In the X-ray diagnostic apparatus according to the fifth embodiment, the read-out area of the X-ray flat panel detector 83 is also automatically set in accordance with the X-ray irradiation area by operating the X-ray X-ray aperture setting switch 86. However, the X-ray diagnostic apparatus according to the sixth embodiment includes an X-ray irradiation area obtained by operating the X-ray aperture setting switch 86, and a reading area of the X-ray flat panel detector 83. Can be set independently of each other.

In the description of the X-ray diagnostic apparatus according to the sixth embodiment, the same reference numerals are given to portions having the same operations as those of the X-ray diagnostic apparatus according to the fifth embodiment, and a detailed description thereof will be given. Omitted.

An X-ray diagnostic apparatus according to the sixth embodiment is
As shown in FIG. 20, X for moving the X-ray diaphragm 82
A line aperture setting switch 86 and a mode selection switch 88 for setting an operation mode are provided. Further, the control unit 87 moves the X-ray aperture unit 82, and also controls the X-ray aperture opening / closing control unit 872 for obtaining the position of the X-ray aperture unit 82,
An irradiation area setting section 871 for obtaining an X-ray irradiation area from the position and operation mode of the X-ray aperture section 82, and an X-ray flat panel detector 83 based on mode information from a mode selection switch 88.
And a read control unit 873 for controlling the scanning line driving unit 34 and the multiplexer 38.

The read control unit 873 stores the size information of the read area and the pixel addition method for each mode, and based on the stored information, the read area and the read area corresponding to the mode information from the mode selection switch 88. The pixel addition method is determined, and the line drive unit 34 and the multiplexer 38 are controlled so that pixel information in the readout area is read by the pixel addition method.

Next, the operation of the X-ray diagnostic apparatus according to the sixth embodiment will be described.

When the operator operates the X-ray aperture setting switch 86, the X-ray aperture opening / closing control section 872 moves the X-ray aperture based on a signal from the setting switch 86. When the setting of the X-ray diaphragm by the operator is completed, the X-ray diaphragm opening / closing controller 872 obtains the X-ray radiation region from the position of the X-ray diaphragm 82 and sends it to the radiation region setting unit 871.

Next, the operator operates the mode selection switch 88.
Is operated to select one of the first to third modes, the selected mode information is sent to the exposure area setting unit 871 and the readout control unit 873. When the first mode is selected, the irradiation area setting unit 871 and the readout control unit 873 set the readout area to the entire imaging surface (4000 pixels × 4000 pixels) of the X-ray flat panel detector 83 and set the pixel addition method to 4 Set for each area of × 4. When the second mode is selected, the exposure area setting unit 871 and the reading control unit 87
Reference numeral 3 denotes a readout area which is one of the imaging surfaces of the X-ray flat panel detector 83.
/ 4 (2000 pixels × 2000 pixels), the pixel addition method is set for each 2 × 2 area. When the third mode is selected, the exposure area setting unit 871 and the read control unit 87
Reference numeral 3 denotes a readout area which is one of the imaging surfaces of the X-ray flat panel detector 83.
/ 16 (1000 pixels × 1000 pixels), the pixel addition method is set for each 1 × 1 area (pixel addition is not performed).

When the X-ray irradiation area information and the mode information are input, the irradiation area setting section 871 obtains the optimum X-ray irradiation area based on the information and obtains the X-ray aperture opening / closing control section 871.
Send to 2. That is, the irradiation area setting unit 871 outputs an area where the X-ray irradiation area set by the operator and the readout area in the set mode overlap as the optimum X-ray irradiation area. The X-ray aperture control unit 872 moves the X-ray aperture unit 82 so that X-rays are emitted to the optimal X-ray exposure area sent from the exposure area setting unit 871.

For example, by operating the X-ray aperture setting switch 86, half of the entire area of the X-ray flat panel detector 83 is designated as the irradiation area.
When the second mode, which is a quarter area of the X-ray flat panel detector 83, is designated by the operation of, the opening / closing control unit 872
1 / of the X-ray flat panel detector 83 corresponding to the second mode.
The X-ray aperture section 82 is so arranged that X-rays are emitted only to the area 4.
The width of the opening.

On the contrary, as a result of comparison between the irradiation area and the reading area in the irradiation area setting section 871, when the reading area is wider than the irradiation area (X-rays are narrower than the reading area). Opening / closing control unit 54
Maintains the exposure area controlled based on the setting of the X-ray aperture setting switch 86.

As a result, it is possible to prevent inconvenience that extra X-rays are irradiated to the area larger than the readout area of the X-ray flat panel detector 83, to reduce the amount of exposure of the subject, and to reduce the amount of exposure. The same effect as in the fifth embodiment can be obtained.

FIG. 21 is a diagram showing a modification of the sixth embodiment. In this modification, two X-ray aperture units 82
And a _1, 82 _2. The X-ray aperture control unit 872
Based on the setting of the X-ray aperture setting switch 86, and controls the X-ray diaphragm unit 82 _1, based on the setting of the mode selection switch 88, controls the X-ray diaphragm unit 82 _2. This makes the sixth
The same effect as that of the embodiment can be obtained.

Note that such control of the aperture width and control of the readout area of the X-ray flat panel detector 83 may be used not only during fluoroscopy but also during imaging.

Next, an X-ray diagnostic apparatus according to the seventh embodiment of the present invention will be described.

The X-ray diagnostic apparatus according to the fifth and sixth embodiments described above uses the X-ray plane detector 83
Was fixed with reference to the center of
In the X-ray diagnostic apparatus according to the embodiment, a reading area can be set at an arbitrary position of the X-ray flat panel detector 83.

FIG. 22 is a view showing an X-axis according to the seventh embodiment of the present invention.
It is a lineblock diagram of a line diagnostic device.

The X-ray diagnostic apparatus according to the seventh embodiment comprises:
The X-ray diagnostic apparatus according to the above-described sixth embodiment has a configuration in which a read area setting switch 89 for an operator to set a read area at an arbitrary position on the X-ray flat panel detector 83 is provided. The signal from the read area setting switch 89 is input to the X-ray aperture control unit 872.

In the X-ray diagnostic apparatus according to the seventh embodiment, for example, as shown in FIG.
3 is divided into a plurality of readout areas, and each divided readout area is assigned an area number. In the example shown in FIG. 23, the case of the second mode is shown, and five regions are shown as examples. In the case of the third mode, the image is divided into corresponding sizes.

The read area setting switch 89 is formed by a plurality of switches for selecting each area number.
The operator selects an area number corresponding to a desired read position in the second and third modes.

The X-ray aperture opening / closing control section 872 performs fluoroscopy from the read area of the X-ray flat panel detector 83 selected by the read area setting switch 89 in the mode designated by the mode selection switch 88 described with reference to FIG. Read and control the image.

Specifically, when the second mode is instructed by the mode selection switch 88, a total of 4 pixels of 2 × 2 pixels from the read area at the position selected by the read area setting switch 89 is set to 1 pixel. The reading control of the X-ray flat panel detector 83 is performed so as to read a fluoroscopic image. When the third mode is instructed by the mode selection switch 88, the X-ray flat panel detector 83 is read and controlled so that the fluoroscopic image of the read area at the position selected by the read area setting switch 89 is read as it is.

As a result, the subject, the X-ray flat panel detector 83
It is possible to obtain a fluoroscopic image at a desired position without moving, etc., and to obtain the same effects as those of the fifth and sixth embodiments.

Next, an X-ray diagnostic apparatus according to the eighth embodiment of the present invention will be described.

The X-ray diagnostic apparatuses according to the above-described fifth to seventh embodiments use the X-ray flat panel detector 83 having the same size (length × width) of each pixel. The X-ray diagnostic apparatus according to the eighth embodiment uses an X-ray flat panel detector in which pixels of different sizes are mixed.

In the X-ray flat panel detector 83 provided in the X-ray diagnostic apparatus according to the eighth embodiment, as shown in FIG. 24, the whole area has a size of 4000 pixels × 4000 pixels. , 2000 pixels corresponding to the center of the entire area ×
An area of 2000 pixels (shown by hatching in FIG. 24; this area is hereinafter referred to as a “high-resolution area”) is an area other than the high-resolution area (hereinafter, this area is referred to as a “low-resolution area”).
That. ) Is composed of pixels having a size that is １ ／ of the size of the pixels that constitute). That is, when the X-ray flat panel detector 83 is manufactured, it is designed and manufactured so that pixels of different sizes are mixed.

The X-ray diagnostic apparatus according to the eighth embodiment has a first mode for reading an image of the entire area of the X-ray flat panel detector 83 and a second mode for reading only an image of an area of 2000 × 2000 pixels. There are two modes.

When the first mode is designated, the control section 87 controls reading of the pixels in the low resolution area as it is, and controls the pixels in the high resolution area as described with reference to FIG. Reading control is performed with a total of 4 pixels of 2 pixels × 2 pixels as one pixel. Thus, in the first mode, X
A fluoroscopic image of the entire area of the line plane detector 83 can be obtained.

Next, when the second mode is designated, the control section 87 controls to read out only the pixels in the high resolution area one pixel at a time. As described above, the pixels in the high-resolution area have a size that is の of the pixel size other than the high-resolution area. For this reason, in the second mode, the field of view is narrowed to the high resolution area, but the target part can be observed with four times the resolution of the first mode.

In the X-ray diagnostic apparatus according to the eighth embodiment, the X-ray flat panel detector itself is divided into coarse pixels and fine pixels in advance. The X-ray flat panel detector can be formed with a smaller number of pixels than the number of pixels of the X-ray flat panel detector 83 provided in the X-ray diagnostic apparatus according to the embodiment, and the yield can be improved when manufacturing the X-ray flat panel detector. Can contribute.

In the eighth embodiment, such readout control may be performed not only at the time of fluoroscopy but also at the time of photographing.

Lastly, the X-ray diagnostic apparatus according to the present invention
The present invention can be applied to any apparatus that irradiates an X-ray to a subject and obtains an X-ray image such as an X-ray CT apparatus.

The description is made such that the number of vertical and horizontal pixels of the X-ray flat panel detector 83 is 4000 pixels × 4000 pixels, and the processing capability of the image processing unit 84 at the subsequent stage is 1000 pixels × 1000 pixels. For the sake of convenience, specific numerical values have been described, but this is merely an example, and various changes can be made according to the design and the like within a range not departing from the technical idea according to the present invention. Of course.

According to the above-described embodiment, in an X-ray diagnostic apparatus using an X-ray flat panel detector having a fixed spatial resolution, imaging with a large field of view and high-level imaging can be performed in accordance with the processing capability of the subsequent image processing unit. It is possible to perform both the imaging with the spatial resolution and to reduce the load on the subsequent image processing unit. Therefore, the device can be configured at low cost.

Next, an X-ray diagnostic apparatus according to the ninth embodiment of the present invention will be described.

FIG. 25 shows an X-ray diagnostic apparatus according to the ninth embodiment.
The present invention can be applied to a biplane inspection apparatus mainly used for cardiovascular angiography as shown in FIG.

In FIG. 25, a biplane inspection apparatus according to the ninth embodiment includes a frontal holding apparatus 301 which is a floor-mounted X-ray diagnostic apparatus mounted on the floor, and a stationary X-ray diagnostic apparatus mounted on a ceiling or the like. And a lateral holding device 302.

The frontal holding device 301 includes an X-ray generator 304 provided at both ends of a C-shaped C-arm 303 so as to face each other, and an X-ray flat detector 305 as an X-ray detector. The X-ray flat panel detector 305 is connected to the X-ray generator 30.
And a moving mechanism 306 for controlling the movement to the 4th side and the anti-X-ray generation unit 304 side.

The lateral holding device 302 has an Ω-shaped Ω
X provided at both ends of the arm 310 so as to face each other.
X-ray flat panel detector 3 serving as X-ray generator 307 and X-ray detector
08 and the X-ray flat panel detector 308
Mechanism 3 for controlling the movement to the side and the side opposite to the X-ray generation unit 307
09.

Incidentally, the X-ray flat panel detectors 305 and 308
The configuration is the same as that of the X-ray flat panel detector 7 shown in FIG.

Next, the biplane inspection apparatus has a control section 311 for controlling the entire inspection apparatus, an operation section 312 for the operator to specify a desired operation, and a flow following the flow of the contrast agent. X-ray flat panel detector 30 to be moved
A read area preset memory 313 in which 5,308 read area sizes are preset.

The X-ray flat panel detector 30
A field-of-view movement operation tool 314 provided with a front joystick 317 (F joystick) and a lateral joystick 318 for manually controlling the movement of 5,308 readout areas, and an operation mode of readout area movement control are set. Mode setting key 31 for performing
5 and a read area setting key 316 for presetting a read area of each of the X-ray flat panel detectors 305 and 308.

Next, the operation of the biplane inspection apparatus according to the ninth embodiment having such a configuration will be described.

[0204] For example, if a cardiovascular angiography test is performed using this biplane inspection apparatus, the operator first gives a subject on a bed (not shown) a frontal position which is a typical positioning of the test. The C arm of the holding unit 301 is set to RAO 30 °, and the Ω arm of the lateral holding device 302 is set to LAO 60 °.

Next, the operator operates the readout area setting key 316 of the operation unit 312 to set the readout area size of each of the X-ray flat panel detectors 305 and 308 to follow the flow of the contrast agent.

Specifically, when the operator sets the read area setting key 3
When the setting of the readout area size is specified by operating the control unit 16, the control unit 311 controls the display of a closed line such as a circle or a rectangle for specifying the area on the monitor device.
When the operator operates a mouse, a cross key, or the like up, down, left, or right, for example, the control unit 311 moves and displays the closed line up, down, left, right, or the like in accordance with an operation of the mouse or the like. Also,
For example, when the operator touches a mouse, a cross key, or the like on the closed line and performs an operation up, down, left, or right, the size of the closed line changes. Then, when the closed line displayed on the monitor has a desired size at a desired position, the operator turns on the enter key. When the enter key is turned on, the control unit 311 fetches the size of the read area set immediately before.

Thus, the size of the readout area can be expanded or contracted to a size desired by the operator.
As will be described later, the control unit 311 controls each of the X-ray flat panel detectors 30 based on the size of the readout area set in this manner.
5,308 read control is performed.

Here, in the biplane inspection apparatus,
In this way, a read area of a desired size can be set each time, and a size of a read area that is frequently used can be preset.

For example, if each of the X-ray flat panel detectors 305 and 308 has a 9-inch visual field, the read area setting key 316 is used to specify a read area size such as 4 inches or 6 inches. An area selection key is provided. The operator selects a readout area selection key corresponding to a frequently used readout area size from the readout area selection keys, and performs an ON operation. Thereby, the control unit 311
The read-out area size corresponding to the read-out area selection key that has been turned on is stored in the read-out area preset memory 313, and when the read-out control of each of the X-ray flat panel detectors 305 and 308 described later is performed, this preset read-out area is used. The read control is performed by the size.

When the setting or designation of the readout area size is completed, the operator next proceeds to the operation mode setting key 3
15 is operated to select a mode for controlling the movement of the read area.

The operation modes that can be set by the operation mode setting key 315 include a total of three of the first to third modes.
There are two modes. In the first mode, the joysticks 317 and 31 of the visual field movement operation tool 314 are used.
A mode in which the readout areas of the X-ray flat panel detectors 305 and 308 are independently controlled by independently operating the X.8
Is a mode in which the readout areas of the X-ray flat panel detectors 305 and 308 are linked and controlled by operating only the joystick 317 for frontal, and the third mode is an operation using only the joystick 317 for F. The readout area of the X-ray flat panel detector 305 is
7 and the X-ray flat panel detector 3
The read area 08 is in a mode in which the movement is controlled in a direction orthogonal to the operation direction of the joystick 317.

Next, when the operator sets a desired mode using the operation mode setting key 315, the operator designates the start of fluoroscopy by turning on a fluoroscopy designation key (not shown). When detecting the ON operation of the fluoroscopy designation key, the control unit 311 controls the X-ray generation units 304 and 307 of the holding devices 301 and 302 so as to emit a small amount of X-rays to the subject. .

Each of the X-ray flat panel detectors 305 and 308 of each of the holding devices 301 and 302 captures an X-ray image formed by this X-ray irradiation.

Specifically, each of the X-ray plane detectors 305 and 3
Reference numeral 08 denotes a light reflection layer 48 shown in FIG. 3, which reflects visible light other than X-rays transmitted through the subject. As a result, only X-rays enter the phosphor 49 via the light reflection layer 48. The phosphor 49 converts the incident X-rays into visible light, and converts this visible light to a photodiode sensitive to visible light via the transparent protective film 50, the second polyimide resin layer 63, and the transparent electrode 60. Incident.

The photodiode forms a charge corresponding to the amount of visible light, and supplies the charge to the storage capacitor.

The control section 311 operates the read area setting key 316 or the read area preset memory 313 shown in FIG.
Each X is set so that the readout area size is stored and controlled in advance.
The scanning line driving unit 34 and the multiplexer 38 of the line plane detectors 305 and 308 are controlled.

Thus, each of the X-ray plane detectors 305 and 3
08 is read out as an image signal in pixel units for each line via signal lines 36-1, 36-2,..., 36-n, and selected by the multiplexer 38. It is supplied to the monitor device via the output terminal 39.

Since the read image signal is proportional to the dose of X-rays, the X-ray images captured by the X-ray flat panel detectors 305 and 308 are stored in the respective holding devices as shown in FIG. Each monitor device 355 corresponding to 301, 302,
356 can be displayed.

Next, the operator operates the monitor devices 355, 3
The joysticks 317 and 318 are operated so as to follow the flow of the contrast agent while confirming the flow of the contrast agent flowing through the cardiovascular displayed on 56.

As described above, each joystick 31
The operation mode by the operations of 7, 318 is set by the operation mode setting key 315 from among the first to third modes. However, when the first mode is selected, Each joystick 317,3
The respective X-ray flat panel detectors 30 according to the respective operations of
The movement of each of the 5,308 readout areas is independently controlled,
When the second mode is selected, the X-ray flat panel detector 30 is operated by operating only the frontal joystick 317.
When the third mode is selected, the read area of the X-ray flat panel detector 305 is changed by operating the joystick 317 only when the third mode is selected. In addition to controlling the movement in the operation direction, the reading area of the X-ray flat panel detector 308 is controlled to move in the direction orthogonal to the operation direction of the joystick 317.

The control unit 311 controls the movement of the readout area, and controls the X-ray generation units 304 and 304 so that X-rays are emitted corresponding to the readout area to be controlled.
An X-ray aperture provided at 307 is controlled.

When there is a correlation between the moving direction and the moving amount of each reading area of each of the holding devices 301 and 302, the operator can
Select the third mode.

When the third mode is selected, the control unit 311 controls the movement of the readout area of the X-ray flat panel detector 305 in accordance with the operation direction of the joystick 17 for F, and controls the movement of the joystick 317. The reading area of the X-ray flat panel detector 308 is controlled to move in a direction orthogonal to the operation direction. Further, the control unit 311 controls the X-ray apertures provided in the X-ray generation units 304 and 307 so that the X-rays are emitted only to the readout regions of the X-ray flat panel detectors 305 and 308 to be moved. Control.

As a result, the joystick 31 for F
7 by operating only the X-ray flat panel detectors 305, 3
08 can be controlled to move, and as shown in FIG. 27, each of the holding devices 301 and 3 that follow the flow of the contrast agent.
02 images can be obtained. In addition, it is possible to prevent the inconvenience of irradiating X-rays to unnecessary portions other than the readout region, and to reduce unnecessary exposure of the subject.

Here, the biplane inspection apparatus is provided with joysticks 317 and 318 for frontal and lateral for controlling the movement of the read area. The joysticks 317 and 318 are provided.
If the amount of movement in the head-to-tail direction of the readout area for which movement is controlled by operating is not the same amount for each of the holding devices 301 and 302, a shift occurs in each image (region of interest) on the monitor device.

For this reason, in the biplane inspection apparatus, the amount of movement in the head-to-tail direction is shared, and the control unit 31
When one of the joysticks 317 and 318 is operated, 1 controls the movement of the readout area corresponding to the other joystick so that the movement amount in the head-to-tail direction corresponds to the operation. .

As a result, each joystick 317,
It is possible to prevent the inconvenience of causing a shift in each image (region of interest) displayed on the monitor due to a shift in the amount of movement of the reading area in the head-to-tail direction due to the operation of 318.

In general, each image read from each of the X-ray flat panel detectors 305 and 308 displayed on the monitor generally has the left side of the region of interest on the right side of the display screen, and the left side of the image on the left side of the display screen. Displays the right side of the region of interest.
Therefore, when the joysticks 317 and 318 are tilted to the right, a display is made such that the right side of the region of interest moves to the center of the monitor, that is, the region of interest in the direction opposite to the operation direction moves to the center of the monitor. When displayed, an uncomfortable feeling is caused.

For this reason, when the control unit 311 controls the movement of the reading area of each of the X-ray flat panel detectors 305 and 308, the reading control is performed so that the area of interest moves on the monitor in the operation direction of the joysticks 317 and 318. I do.

Thus, the joysticks 317, 317
Images corresponding to the 18 operation directions can be displayed on the monitor.

As is clear from the above description, the ninth embodiment
The biplane inspection apparatus according to the embodiment is configured such that each X-ray flat panel detector 30
The movement of the 5,308 readout area is controlled and imaging is performed following the flow of the contrast agent.

Therefore, each joystick 3 can be moved without operating each of the holding devices 301 and 302 and the bed table.
The cardiovascular angiography examination can be performed only by the operations of 17, 318. Therefore, even in a biplane inspection such as a cardiovascular angiography inspection, an operation following the flow of the contrast medium can be sufficiently performed by one operator, and the best X-ray image can be obtained without fail.

Further, since the fluoroscopic position of the subject is changed by changing the reading range of the X-ray flat panel detector, the C arm 303, the Ω arm 310, and the subject when changing the fluoroscopic position are changed. It is possible to reduce the movement of the top plate on which the table is placed. Then, when changing the fluoroscopic imaging position, C
Since the movement of the arm 303, the Ω arm 310, and the top on which the subject is placed can be reduced, accidents such as collisions when the arm and the top move can be reduced.

Next, a biplane inspection apparatus according to a tenth embodiment of the present invention will be described.

In the biplane inspection apparatus according to the ninth embodiment, the operator operates the X-ray flat panel detector 3
Each joystick 31 while viewing the images of 05 and 308
The biplane inspection apparatus of the tenth embodiment controls the movement of the readout area by operating the readout area on a predetermined trajectory. It is intended to be completely omitted.

That is, usually, the positioning of each of the holding devices 301 and 302 is determined according to the inspection contents.
The flow of the contrast agent does not vary so much between individuals. For this reason, the biplane inspection apparatus according to the tenth embodiment has a configuration in which a movement pattern memory 357 that stores a movement pattern of a read area for each inspection content is provided as shown in FIG.

At the same time, the operation section 312 is provided with an inspection content setting section 356 for setting the inspection content.
Control unit 31 transmits contrast agent injection information (injection information) from injector 355 that injects the contrast agent into the subject.
1 is taken in.

Since the other configuration is the same as that of the biplane inspection apparatus of the ninth embodiment described above, FIG.
Here, the same reference numerals are given to portions indicating the same operation, and duplicate description will be avoided.

In the biplane inspection apparatus according to the tenth embodiment, the operator specifies the inspection content by using the inspection content setting section 356. In the examination content setting section 356, for example, a plurality of selection keys for designating each of the examinations are provided, and the operator turns on a desired selection key from among them.

When the control section 311 detects the ON operation of the selection key, the control section 311 reads from the movement pattern memory 357 the movement pattern program of the read area corresponding to the selected operation key. Injection information indicating the state of injection of the contrast agent is supplied from the injector 355 to the control unit 311.

The control unit 311 detects the flow of the contrast agent according to the injection information, and controls the movement of each readout area of each of the X-ray flat panel detectors 305 and 308 based on the movement pattern program.

Thus, by simply operating the examination content setting section 356 and selecting the examination content, the movement of each readout area can be automatically controlled to follow the flow of the contrast agent. The same effect as that of the biplane inspection apparatus of the embodiment can be obtained.

In the case of a special examination, a technique similar to bolus chasing performed in a lower limb contrast blood vessel examination may be used.

Next, a description will be given of a biplane inspection apparatus according to an eleventh embodiment of the present invention.

The biplane inspection apparatus of the tenth embodiment controls the movement of each readout area along a trajectory programmed in advance according to the set inspection contents. The biplane inspection apparatus of this example captures image information from each of the X-ray flat panel detectors 305 and 308 in real time, and controls the movement of the readout area according to a change in the pixel value of this image.

That is, the biplane inspection apparatus of the eleventh embodiment detects a change in the pixel value of each image information from each of the X-ray plane detectors 305 and 308 as shown in FIG. The configuration is such that a readout area pixel value detection section 360 to be supplied to the control section 311 is provided.

Note that the other configuration is the same as that of the above-described biplane inspection apparatus of the ninth embodiment.
Here, the same reference numerals are given to portions indicating the same operation, and duplicate description will be avoided.

In the biplane inspection apparatus according to the eleventh embodiment, the control unit 311 controls the X-ray plane detectors 305,
The entire image area 308 is equally divided into, for example, four upper, lower, left, and right divided areas, and the image in each of the divided areas is read-out controlled at predetermined time intervals, for example, and supplied to the read-out area pixel value detector 360.

The readout area pixel value detection section 360 integrates pixel values for each image of each divided area supplied every predetermined time, and when the pixel value becomes equal to or higher than a predetermined level (or equal to or lower than a predetermined level). Then, it is determined that the contrast agent has flowed into the blood vessel located in the divided area, and the readout area is moved and controlled in the divided area.

Specifically, when the contrast agent flows along the blood vessel, the pixel value of the image of the divided area gradually increases in white level. For this reason, when the pixel values are integrated, the sum of the pixel values of the image in which the contrast agent has begun to flow into the blood vessels gradually decreases. For this reason, the control unit 311 controls the movement of the reading area so as to follow the area having the low pixel value.

As a result, as shown in FIG. 30, the movement of the reading area can be controlled so as to automatically follow the flow of the contrast agent, and the same effect as that of the biplane inspection apparatus of the ninth embodiment can be obtained. Obtainable.

In the description of the eleventh embodiment, the whole area of each of the X-ray flat panel detectors 305 and 308 is divided into four parts. It may be a number. By increasing the number of divisions, the tracking accuracy in the traveling direction of the blood vessel is improved. If the direction of blood vessel travel is limited, it may be divided into two.

The display image of the reading area may be displayed as it is without being enlarged, or may be enlarged and displayed. At the time of enlarged display, it is desirable to previously form the pixel density of each of the X-ray flat panel detectors 305 and 308 so as to obtain a required resolution.

Finally, an example in which the X-ray diagnostic apparatus according to the present invention is applied to a biplane inspection apparatus has been described. In addition, for example, the present invention is applied to a single plane inspection apparatus. It goes without saying that various changes can be made in accordance with the design and the like as long as they do not deviate from the technical idea according to the above.

According to the X-ray diagnostic apparatus of the above embodiment, the operation can be simplified. For this reason, even in a biplane examination such as a cardiovascular contrast examination, a single operator can sufficiently perform the operation following the flow of the contrast medium, and the best X-ray image can be reliably obtained without failure. it can.

Next, an X-ray diagnostic apparatus according to the twelfth embodiment of the present invention will be described.

FIG. 31 is an overall configuration diagram of an X-ray diagnostic apparatus according to the twelfth embodiment, FIG. 32 is an enlarged partial cross-sectional view of a main part thereof, and FIGS. 33 and 34 relate to the present embodiment. 5 is a flowchart illustrating an operation of the X-ray diagnostic apparatus.

As shown in FIG. 31, the X-ray diagnostic apparatus 401 of this embodiment comprises a supporter 407 as a holding means comprising an arcuate arm 403 and a C arm 405;
A connecting portion 409 provided at an upper end portion of the connecting portion 40;
X as an X-ray imaging means rotatably supported by 9
A line plane detector 411, an X-ray tube 413 as X-ray generating means provided at the lower end of the C-arm 405,
15 and a suspension base 417 for suspending the support 407 from the ceiling.
, A rotation angle control unit 419, and a power supply device and a monitor device for an X-ray tube (not shown).

The X-ray flat panel detector 411 is imaging means in which a plurality of pixels for converting X-rays into electric signals and storing the electric signals are arranged in a matrix, and converts an image signal of each pixel according to an incident X-ray amount. This image signal is displayed on a monitor device directly or after being subjected to appropriate image processing. The X-ray flat panel detector may be a direct conversion type or an indirect conversion type.

The upper end of the arcuate arm 03 of the supporter 407 is rotatably supported in a horizontal plane on a suspension base 417 capable of running vertically and horizontally on the ceiling. The center of the C-arm 405 is slidably and rotatably connected to the lower end of the arc-shaped arm 403. At the upper end of the C-arm 405,
The X-ray flat panel detector 411 is rotatable via the connection unit 409.
An X-ray tube 413 serving as an X-ray source is provided at the lower end of the C-arm 405 so as to face the X-ray flat panel detector 411.
Is provided.

The rotation angle control section 419 includes the
The rotation angle φA with respect to the suspension base 417 at the upper end of is detected,
The rotation angle φB of the connecting portion 409 between the C-arm 405 and the X-ray flat panel detector 411 is controlled so as to cancel the rotation caused by φA.

FIG. 32 is an enlarged partial cross-sectional view showing the details of the connection portion. The same components as those in FIG. 31 are denoted by the same reference numerals.

The connecting portion 409 rotatably connects the upper end of the C-arm 405 and the X-ray flat panel detector 411. The connecting portion 409 is divided into upper and lower rotatable upper and lower cylinders 421 and 423 which are rotatable with each other. It has.

The upper cylinder 421 of the connecting portion 409 is fixed to the upper end of the C-arm 405, and a stepping motor 425, a rotating shaft member 427, and a rotary encoder 429 are provided therein.

The lower cylinder 423 is rotatably supported around a rotary shaft member 427, and an X-ray flat panel detector 411 is provided at the lower end thereof. A ring gear 431 is formed on the inner periphery of the upper end of the lower cylinder 423. An A pinion 433 that fits with the ring gear 431 is provided on the shaft of the stepping motor 425, and the lower cylinder 423 can rotate in the forward and reverse directions together with the X-ray flat panel detector 411 by the forward and reverse rotation of the stepping motor 425. ing.

A B pinion 435 connected to the rotary encoder 429 is fitted into the ring gear 431, and the rotation angle of the ring gear 431, that is, the C arm 40
5, the rotation angle φB of the X-ray flat panel detector 411 can be detected.

Although not shown, a signal line for connecting the X-ray flat panel detector 411 to a monitor or an image processing apparatus and a feed line for the X-ray flat panel detector 411 are provided inside or around the rotating shaft member 427, for example. It is connected via a provided spiral cord or slip ring.

Next, the operation of the X-ray diagnostic apparatus according to this embodiment will be described with reference to FIGS.

When examining the subject placed on the bed 415, the supporter 407 rotates around the subject by rotating the axis A of the supporter 407 shown in FIG. −
The detector system can be inserted from any direction of the subject. Thus, the surgeon can access the subject from any direction.

At this time, the connecting portion 409 between the supporter 407 and the X-ray flat panel detector 411 rotates in accordance with the rotation of the supporter 407 about the axis A. The rotation angle is controlled. The rotation control unit 419 reads a signal from a rotation angle detection unit (not shown) provided in advance on the axis A of the supporter 407, and sets the X-ray flat panel detector 411 to a direction always set in advance with respect to the subject or the bed. The rotation angle of the connecting portion 409 is calculated so as to face the direction, and is moved.

As a result, even if the supporter 407 rotates by an arbitrary angle (φA) with respect to the axis A, the X-ray flat detector 411
Are rotated by the same rotation angle φB in the opposite direction with respect to the supporter 407 by the rotation mechanism of the connection portion 409, so that both rotations cancel each other out, and the X-ray flat panel detector 411 is always positioned at the same position In the same direction. For this reason, even if the supporter rotates, since the X-ray flat panel detector appears fixed to the subject, the subject does not feel uneasy.

Also, since the X-ray flat panel detector is fixed to the subject, the X-ray image on the monitor screen is displayed even if the supporter moves with respect to the axis A. A good image for inspection can be obtained without rotation.

Next, this operation will be described with reference to the flowchart of FIG.

In this description, the rotation angle is a real number with a sign. For example, the clockwise rotation angle with respect to the reference rotation position is +, and the counterclockwise rotation angle is −. A rotation angle smaller than a control error for which it is determined that there is substantially no difference in rotation angles is set as a convergence determination value ε.

First, the rotation angle φA of the axis A is detected (step S211). Next, a rotation target value θB of the axis B corresponding to φA is calculated (step S213). Then axis B
Is detected (step S215), and the rotation target value θB is compared with the rotation angle φB (step S21).
7). As a result of this comparison, if | θB−φB | <ε (convergence determination value), it is determined that the target has been reached, and the operation is terminated.

As a result of the comparison in step S217, | θB−
If φB | ≧ ε and φB <θB, the shaft B is rotated in a direction to increase φB (step S219), and the process returns to step S217.

As a result of the comparison in step S217, | θB−
If φB | ≧ ε and φB> θB, the shaft B is rotated in a direction in which φB decreases (step S221), and the process returns to step S217.

FIG. 34 is a flowchart showing a modification of the rotation angle control shown in FIG.

First, it is determined whether or not the axis A and the axis B are in the interlock mode (step S231). The linked mode is a mode in which the axis B is controlled by the control of the rotation control unit 419 so as to cancel the rotation of the axis A.

Next, the rotation angle φA of the axis A is detected (step S233), and the rotation angle φB of the axis B is detected (step S235). Next, both rotation angles are compared (step S237). If the result is (φA + φB) <0 and | φA + φB |> ε (convergence determination value), the shaft B is rotationally driven in a direction in which φB increases (step S237). S239),
It returns to step S231.

In the determination in step S237, (φA
+ ΦB)> 0 and | φA + φB |> ε (convergence judgment value)
If so, the shaft B is rotationally driven in the direction in which φB decreases (step S241), and the process returns to step S231.

In the determination in step S237, | φA
If + φB | ≦ ε (convergence determination value), the rotation driving of the shaft B is stopped (step S243), and the process returns to step S231.

According to the above operation, in the interlocking mode between the axes A and B, the axis B rotates so as to cancel the rotation of the axis A, and from the viewpoint of the bed and the examinee, the direction of the insertion of the C-arm varies. Instead, the X-ray flat panel detector always faces in the same direction, giving the subject a sense of security and eliminating the rotation of the X image displayed on the monitor.

Next, a modification of the embodiment of the present invention will be described.

In the first modification, as shown in FIG. 35, a circular cover 44 is provided around the X-ray flat panel detector 411 in FIG.
1 is provided. The cover is made of a material having good X-ray transparency, for example, carbon fiber reinforced plastic (CFR).
P) and covers the entire X-ray flat panel detector.

This cover may be rotated integrally with the X-ray flat panel detector, may be independently rotated with the X-ray flat panel detector, and may be fixed to the upper end of the C-arm. It may be something.

[0287] In the second modification, the X-ray flat panel detector 41 is applied when a certain force or more is applied to the connecting portion 409 in FIG.
1 is changed to rotate freely.

For this reason, a spring is interposed between the axis of the stepping motor 425 and the A pinion 433. In a normal load range, the amount of deformation of the spring does not reach a predetermined value. The driving force is transmitted to the A pinion 433, but when a load exceeding a certain level is applied, the amount of deformation of the spring reaches a predetermined value, and the stepping motor 42
The fifth shaft idles, and the driving force is not transmitted to the A pinion 433. Also in this case, B pinion 435
Sets the rotation angle of the ring gear 431 to the rotary encoder 4
29, the rotation angle of the shaft B can be controlled to a desired value after the force that caused the overload is removed.

According to the above embodiment, in the X-ray diagnostic apparatus using the X-ray flat panel detector, when the arm holding the X-ray source and the X-ray flat panel detector is inserted from any direction of the subject. However, there is an effect that the examinee does not feel uneasy and the direction of the image displayed on the monitor screen can always be kept constant.

[0290]

According to the present invention described above, it is not necessary to set the relative position between the X-ray source and the X-ray detector and the position of the subject, so that the X-ray image can be easily obtained without any trouble. Is obtained.

In particular, in the case of emergency medical treatment, there is an effect that the number of humans for X-ray imaging can be reduced and an X-ray image can be obtained promptly.

According to the present invention, in an X-ray diagnostic apparatus using an X-ray flat panel detector having a fixed spatial resolution, imaging of a large field of view and high It is possible to perform both the imaging with the spatial resolution and to reduce the load on the subsequent image processing unit. Therefore, the device can be configured at low cost.

According to the present invention, the operation can be simplified. For this reason, even in a biplane examination such as a cardiovascular contrast examination, a single operator can sufficiently perform the operation following the flow of the contrast medium, and the best X-ray image can be reliably obtained without failure. it can.

According to the present invention, in the X-ray diagnostic apparatus using the X-ray flat panel detector, when the arm holding the X-ray source and the X-ray flat panel detector is inserted from any direction of the subject. However, there is an effect that the examinee does not feel uneasy and the direction of the image displayed on the monitor screen can always be kept constant.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an X-ray diagnostic apparatus according to the present invention.

FIG. 2 is a diagram showing a configuration of an X-ray flat panel detector.

FIG. 3 is a cross-sectional view of the X-ray flat panel detector.

FIG. 4 is a flowchart illustrating the operation of the first embodiment.

FIG. 5 is a flowchart illustrating details of irradiation area determination.

FIG. 6 is a flowchart illustrating details of display of a subject area.

FIG. 7 is a diagram illustrating a positional relationship between an X-ray irradiation area and an X-ray flat panel detector and a display on a monitor.

FIG. 8 is a diagram illustrating an irradiation area and a display area.

FIG. 9 is a diagram showing a monitor display example of a display area.

FIG. 10 is a flowchart illustrating an example of speeding up reading of pixel data of subsequent X-ray irradiation with reference to a display area of preceding X-ray irradiation according to the second embodiment.

FIG. 11 is a diagram for explaining a method of reading out only part of data in an irradiation area.

FIG. 12 is a diagram for explaining a method of reading out only a part of data of an irradiation area.

FIG. 13 is a diagram illustrating an example of determining whether or not a pixel data readout area for subsequent X-ray irradiation is within a margin range.

FIG. 14 is a main part configuration diagram of a third embodiment.

FIG. 15 is a diagram illustrating the geometry of an X-ray focal point, an aperture, and an irradiation area of an X-ray flat panel detector.

FIG. 16 is a flowchart illustrating the operation of the third embodiment.

FIG. 17 is a block diagram of an X-ray diagnostic apparatus according to a fifth embodiment of the present invention.

FIG. 18 is a diagram illustrating a read area of an X-ray flat panel detector in which an X-ray diagnostic apparatus according to a fifth embodiment performs read control in first to third modes.

FIG. 19 is a diagram for explaining read control in first to third modes executed by the X-ray diagnostic apparatus according to the fifth embodiment.

FIG. 20 is a block diagram of an X-ray diagnostic apparatus according to a sixth embodiment of the present invention.

FIG. 21 is a view showing a modification of the sixth embodiment.

FIG. 22 is a block diagram of an X-ray diagnostic apparatus according to a seventh embodiment of the present invention.

FIG. 23 is a view for explaining an X-ray diagnostic apparatus according to a seventh embodiment.

FIG. 24 is a diagram showing an X-ray flat panel detector provided in an X-ray diagnostic apparatus according to an eighth embodiment of the present invention.

FIG. 25 is a block diagram of a biplane inspection apparatus according to a ninth embodiment to which the X-ray diagnostic apparatus of the present invention is applied.

FIG. 26 is a diagram illustrating a monitor device on which a perspective image captured by a lateral holding device and a frontal holding device are displayed.

FIG. 27 is a diagram showing a state in which the perspective fields of the lateral holding device and the frontal holding device are displayed following the flow of the contrast agent in the cardiovascular angiography examination.

FIG. 28 is a block diagram of a biplane inspection apparatus according to a tenth embodiment to which the X-ray diagnostic apparatus of the present invention is applied.

FIG. 29 is a block diagram of a biplane inspection apparatus according to an eleventh embodiment to which the X-ray diagnostic apparatus of the present invention is applied.

FIG. 30 is a view for explaining an operation of automatically controlling the perspective field to follow the flow of the contrast agent by controlling the movement of the perspective field according to the pixel value of the perspective image in the biplane inspection apparatus of the eleventh embodiment. FIG.

FIG. 31 is an overall configuration diagram of an X-ray diagnostic apparatus according to a twelfth embodiment of the present invention.

FIG. 32 is an enlarged partial cross-sectional view of a main part of an X-ray diagnostic apparatus according to a twelfth embodiment.

FIG. 33 is a flowchart illustrating an operation of the X-ray diagnostic apparatus according to the twelfth embodiment.

FIG. 34 is a flowchart illustrating an operation of the X-ray diagnostic apparatus according to the twelfth embodiment.

FIG. 35 is a view for explaining a modification of the twelfth embodiment;

FIG. 36 is a block diagram of a conventional X-ray diagnostic apparatus using an image intensifier as an imaging unit.

FIG. I. FIG. 1 is a configuration diagram illustrating a TV system.

FIG. I. It is a top view which shows the example of the arm insertion direction of -TV system.

FIG. 39 is a view for explaining a biplane operation of a conventional lateral holding device and a frontal holding device in a cardiovascular angiography examination.

FIG. 40 is a diagram showing a perspective image obtained by a conventional biplane operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 X-ray diagnostic apparatus 3 X-ray tube 5 diaphragm 7 X-ray plane detector 9 Tube / diaphragm controller 13a Irradiation area detector 13b Display area selector 81 X-ray tube 82 X-ray diaphragm 83 X-ray plane detector Reference numeral 84 Image processing unit 85 Monitor device 86 X-ray aperture setting switch 87 Control unit 871 Exposure area setting unit 872 X-ray aperture opening / closing control unit 873 Reading control unit 88 Mode setting switch 89 Reading area setting switch 301 Frontal holding device 302 Lateral holding device 311 control unit 312 operation unit 313 readout area preset memory 314 visual field movement operation tool 315 operation mode setting key 316 readout area setting key 355 injector 356 inspection content setting unit 357 movement pattern memory 360 readout area pixel value detection unit 409 connection unit 411 X-ray Plane detector 419 Rotation angle system Gobe 441 Cover

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor 1385-1 Shimoishigami, Otawara-shi, Tochigi Pref.

Claims (36)

[Claims] 1. An X-ray source for irradiating X-rays, a flat detector for detecting X-rays emitted from the X-ray source, and pixel data of an arbitrary area detected by the flat detector. An X-ray diagnostic apparatus, comprising: collection processing means for collecting and processing. 2. The collection processing means according to claim 2, wherein
The pixel data corresponding to an X-ray irradiation area determined based on an opening degree of a stop of a source and a distance between the X-ray source and the flat panel detector is collected. X-ray diagnostic apparatus. 3. The apparatus according to claim 2, further comprising a presentation unit that presents the X-ray irradiation area to an operator.
X-ray diagnostic device. 4. An X-ray irradiating area determined based on an opening degree of an aperture of the X-ray source and a distance between the X-ray source and the flat panel detector, when the X-ray irradiation area protrudes from the flat panel detector. 3. The X-ray diagnostic apparatus according to claim 2, further comprising a notifying unit for notifying that fact. 5. The collection processing unit collectively discards pixel data corresponding to an area other than the X-ray irradiation area of the flat panel detector when collecting pixel data corresponding to the X-ray irradiation area. The X-ray diagnostic apparatus according to claim 2, wherein: 6. The collection processing unit according to claim 5, wherein the charge associated with the pixel data corresponding to an area other than the X-ray irradiation area is released to a signal line provided in the flat panel detector. X-ray diagnostic apparatus. 7. The apparatus according to claim 5, wherein the collection processing unit releases charges related to pixel data corresponding to an area other than the X-ray irradiation area to a power supply line provided in the flat panel detector. X-ray diagnostic apparatus. 8. The apparatus according to claim 2, further comprising: a subject area determining unit that determines and extracts pixel data corresponding to the subject area from the pixel data corresponding to the X-ray irradiation area. X-ray diagnostic apparatus. 9. A display means for displaying an image based on pixel data corresponding to the X-ray irradiation area or pixel data corresponding to the subject area; and pixel data corresponding to the X-ray irradiation area or the subject area. The X-ray diagnostic apparatus according to claim 8, further comprising: display control means for enlarging / reducing an image based on the pixel data corresponding to the image data according to the screen size of the display means. 10. The apparatus according to claim 2, further comprising adjusting means for adjusting at least one of an opening degree of a stop of the X-ray source and a distance between the X-ray source and the flat panel detector. X-ray diagnostic equipment. 11. The acquisition processing means collects adjacent pixel data according to the size of the X-ray irradiation area and its own processing resolution when collecting pixel data corresponding to the X-ray irradiation area. The X-ray diagnostic apparatus according to claim 2, wherein the X-ray diagnostic apparatus performs acquisition. 12. An X-ray source for irradiating X-rays, a plane detector for detecting X-rays emitted from the X-ray source, and an X-ray irradiation area based on pixel data of the plane detector. Area detecting means for detecting an object area of the X-ray irradiation area; display means; display means; all pixel display mode, irradiation area display mode, or object area display mode Setting means for setting, when the all-pixel display mode is set, an image based on all-pixel data is displayed on the display means, and when the irradiation area display mode is set, the X-ray irradiation area is set. An image based on pixel data corresponding to the subject area is displayed on the display means, and an image based on the pixel data corresponding to the subject area is displayed on the display means when the subject area display mode is set. An X-ray diagnostic apparatus, comprising: display control means for controlling the X-ray diagnostic apparatus. 13. The display control means according to the size of a region to be displayed on the flat panel detector, and collects values of adjacent pixel data from the flat panel detector into one value. The X-ray diagnostic apparatus according to claim 12, wherein 14. The display control means according to claim 12, wherein when the irradiation area detecting means does not detect the X-ray irradiation area, the display control means displays on the display means that the X-ray irradiation area could not be detected. The X-ray diagnostic apparatus according to claim 1. 15. An X-ray source for irradiating an object with X-rays, a flat panel detector for detecting X-rays emitted from the X-ray source,
In the method for controlling an X-ray diagnostic apparatus having the above, a first X-ray irradiation is performed by the X-ray source, pixel data is read from the plane detector, and based on the read pixel data, Detecting an area irradiated with X-rays, selecting an area where pixel data should be collected from the flat panel detector based on the detection result, storing information on the area where image data should be collected, A method for controlling an X-ray diagnostic apparatus, comprising: irradiating a second X-ray with a radiation source; and reading pixel data from the flat panel detector based on information on a stored area. 16. An X-ray source for irradiating an object with X-rays, a flat panel detector for detecting X-rays emitted from the X-ray source,
In the method for controlling an X-ray diagnostic apparatus having the above, a first X-ray irradiation is performed by the X-ray source, pixel data is read from the plane detector, and based on the read pixel data, Detecting an area where the subject exists, selecting an area where pixel data is to be collected from the flat panel detector based on the detection result, storing information on the area where the image data is to be collected, A second X-ray irradiation is performed by a source, and pixel data is read out from the flat panel detector based on information of a stored area. 17. An X-ray source for irradiating X-rays, an X-ray stop for limiting an X-ray irradiation area, an opening setting means for setting an opening of the X-ray stop, and the X-ray source. A plane detector that detects X-rays emitted through the X-ray aperture from the X-ray diaphragm, an image processing unit that inputs and processes pixel data detected by the plane detector, and is determined by the opening degree setting unit. The values of pixel data adjacent to the plane detector are grouped into one value and input to the image processing unit according to the size of the irradiation area with respect to the plane detector and the processing resolution of the image processing unit. An X-ray diagnostic apparatus, further comprising: control means for controlling the flat panel detector. 18. The method according to claim 18, wherein the resolution of the pixel of the plane detector corresponding to the size of the irradiation area is higher than the processing resolution of the image processing means. The plane detector is controlled so as to be collected into one value and input to the image processing unit, and the resolution of the pixel of the plane detector corresponding to the size of the irradiation area is determined by the processing resolution of the image processing unit. 18. The image processing apparatus according to claim 17, wherein the plane detector is controlled such that the pixel data corresponding to the processing resolution of the image processing unit is input to the image processing unit as it is when the image data is lower than X. X-ray diagnostic device. 19. The apparatus according to claim 17, wherein the control unit controls the flat panel detector so as to collectively discard pixel data other than the pixel data input to the image processing unit. X-ray diagnostic device. 20. A plurality of X-ray-to-charge conversion means arranged in a matrix, wherein the plurality of X-ray-to-charge conversion means generates charges in accordance with the amount of incident X-rays, and the plurality of X-ray-to-charge conversion means A plurality of accumulating means for accumulating the charges generated by the plurality of switching elements, a plurality of switching elements electrically connected to each of the plurality of accumulating means, and a scanning line driving means for controlling the plurality of switching elements in row units. A plurality of signal lines connected to the output side of the plurality of switching elements for each column; and a selection reading unit that selectively reads a signal of the signal line. 18. The X-ray diagnostic apparatus according to claim 17, wherein the scanning line driving unit is controlled so that switching elements are simultaneously turned on. 21. The X-ray diagnostic apparatus according to claim 20, wherein the control unit controls the selective reading unit so that a plurality of columns of signal lines are simultaneously in a reading state. 22. The X-ray diagnostic apparatus according to claim 17, further comprising an irradiation position setting means for setting an irradiation position of the X-ray to the flat panel detector. 23. An X-ray source for irradiating X-rays, an X-ray stop for limiting an X-ray irradiation area, an opening setting means for setting an opening of the X-ray stop, and the X-ray source. A plane detector for detecting X-rays irradiated through the X-ray aperture from the area detector; an area setting means for setting a size of an area of the plane detector for reading out pixel data; Image processing means for inputting and processing the pixel data; a size of an irradiation area for the plane detector determined by the opening degree setting means; a processing resolution of the image processing means; and setting by the area setting means. And control means for controlling the plane detector so that values of pixel data adjacent to the plane detector are combined into one value and input to the image processing means in accordance with the size of the area. X characterized by the following: Diagnostic equipment. 24. An X-ray source for irradiating X-rays, first and second X-ray stops for limiting an X-ray irradiation area, and an opening for setting an opening degree of the first X-ray stop. Degree setting means, a plane detector for detecting X-rays emitted from the X-ray source through the first and second X-ray apertures, and a size of an area of the plane detector for reading out pixel data. Area setting means for setting and setting the degree of opening of the second X-ray aperture based on the size of the set area; and image processing means for inputting and processing pixel data detected by the flat panel detector. According to the size of the irradiation area for the plane detector determined by the opening degree setting means and the area setting means and the processing resolution of the image processing means, the value of the pixel data adjacent to the plane detector A single value is input to the image processing means. Control means for controlling the flat panel detector as described above. 25. An X-ray source for irradiating X-rays, an X-ray stop for limiting an X-ray irradiation area, an opening setting means for setting an opening of the X-ray stop, and the X-ray source. To detect the X-rays emitted through the X-ray diaphragm from the, a flat detector having a high-resolution detection element in the center, a low-resolution detection element in the periphery, detected by the flat detector Image processing means for inputting and processing the obtained pixel data, and when the size of the irradiation area with respect to the flat detector determined by the opening degree setting means is smaller than the size of the area of the low-resolution detection element. Controlling the plane detector so that the pixel data detected by the high-resolution detection element is directly input to the image processing unit, and the irradiation area of the plane detector determined by the opening degree setting unit is determined. Before the size When the size of the region of the low-resolution detection element is larger than the size of the area, the pixel data detected by the low-resolution detection element and the pixel data detected by the high-resolution detection element are grouped for each adjacent data. Control means for controlling the flat panel detector so as to be input to the image processing means. 26. An X-ray source for irradiating X-rays, a plane detector for detecting X-rays emitted from the X-ray source, and a real-time moving operation of an area of the plane detector for reading out pixel data An X-ray diagnostic apparatus, comprising: an operation unit for performing a reading operation; and a control unit that controls to read out pixel data of an area corresponding to a movement operation performed by the operation unit from the flat panel detector. 27. An X-ray source for a frontal and an X-ray source for a lateral, a flat detector for a frontal and a flat detector for a lateral, operating means for the frontal and operating means for the lateral. The control means reads pixel data of an area corresponding to the movement operation by the frontal operation means from the frontal plane detector, and reads pixel data of the area according to the movement operation by the lateral operation means. 27. The X-ray diagnostic apparatus according to claim 26, wherein control is performed so as to read out from the lateral plane detector. 28. When one of the frontal operation means and the lateral operation means is operated, the control means responds to pixel data in an area corresponding to a movement operation by the operated operation means. 28. The method according to claim 27, further comprising: reading out the pixel data from the corresponding plane detector while reading the data from the corresponding plane detector. 2. The X-ray diagnostic apparatus according to claim 1. 29. When one of the frontal operation means and the lateral operation means is operated, the control means interlocks with the operated operation means in a direction orthogonal to the operated operation means. 29. The X-ray diagnostic apparatus according to claim 28, wherein it is determined that the mobile phone moves. 30. The X-ray diagnostic apparatus according to claim 26, further comprising readout size setting means for setting a size of an area of the flat panel detector for reading out pixel data. 31. An X-ray stop for limiting an X-ray irradiation area, wherein the control means controls an opening degree of the X-ray stop according to a size of the area set by the readout size setting means. 31. The X-ray diagnostic apparatus according to claim 30, wherein the X-ray diaphragm is controlled so that an area irradiated with X-rays moves according to a movement operation of a readout area by an operation unit. 32. An X-ray source for irradiating X-rays, a plane detector for detecting the X-rays irradiated from the X-ray source, and a movement pattern of an area of the plane detector for reading out pixel data. An X-ray diagnostic apparatus comprising: storage means for storing; and control means for controlling pixel data to be read from the flat panel detector based on the movement pattern stored in the storage means. 33. An X-ray source for irradiating X-rays, a plane detector for detecting X-rays emitted from the X-ray source, and an area of the plane detector divided into a plurality of areas, By detecting a change in the value of the pixel data in the area of
Reading range determining means for determining a moving area from which pixel data is to be read, and control means for controlling reading of pixel data from the flat panel detector based on a determination result by the reading range determining means. X-ray diagnostic apparatus. 34. An X-ray source for irradiating X-rays, a flat panel detector for detecting X-rays radiated from the X-ray source, and a flat panel detector rotatable with respect to a subject. Holding means for holding the X-ray source so as to face the same, and rotatably holding the flat panel detector; detecting a rotation angle of the holding means with respect to the subject; and detecting an angle of the flat detector with respect to the subject. X-ray diagnostic apparatus comprising: control means for controlling an angle of the flat panel detector with respect to the holding means, so that is always constant. 35. The X-ray diagnostic apparatus according to claim 34, further comprising a protective cover mounted on the flat panel detector for protection. 36. The X-ray diagnostic apparatus according to claim 34, wherein the flat detector rotates freely with respect to the holding unit when an external force equal to or more than a predetermined value is applied.