JPH11188024A - X ray diagnostic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily take a radiography from the opposite direction. SOLUTION: On the X ray diagnostic device, first X ray pipe 2 and second X ray pipe 3 is mounted opposite to on both ends of a C shaped arm 6 and two flat panel type X ray sensor 4, 5 are set. When the radiography is done with the first X ray pipe 2, the flat panel type X ray sensor 5 is saved to the position that does not block the X ray of the first X ray pipe 2. And the radiography is done with the second X ray pipe 3, the flat panel type X ray sensor 4 is saved to the position that does not block the second X ray pipe. It is possible to do radiography reverse in the reverse irradiation direction with only moving the flat panel type X ray sensor 4, 5. Thus it is possible to do radiography in opposite direction easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a subject (patient)
X-ray diagnostic apparatus in which an X-ray tube that irradiates X-rays and a transmitted X-ray detector that detects transmitted X-rays are related to an X-ray diagnostic apparatus that is held in a C-shaped arm. Related to the technology to be able to do.

[0002]

2. Description of the Related Art Conventionally, in a C-arm type X-ray diagnostic apparatus used in hospitals and the like, as shown in FIG. 13A, a patient M placed on a top plate 60 is irradiated with X-rays. X-ray tube 61 and an image intensifier 62 for detecting transmitted X-rays from patient M are a C-shaped arm (C-arm)
63 is attached to and held at both ends of the patient 63 so as to face each other with the patient M interposed therebetween.

When performing X-ray photography, an X-ray tube 61 irradiates a patient M with X-rays, a transmitted X-ray image of the patient M is detected by an image intensifier 62, and detected by the image intensifier 62. The transmitted X-ray image is transmitted to a TV camera 65 installed at the rear end of the image intensifier 62.
And finally projected on a screen of a monitor (not shown) as an X-ray fluoroscopic image.

As described above, the affected part of the patient M is subjected to X-ray fluoroscopy, but it may be necessary to perform X-ray imaging from the opposite direction depending on the region to be X-rayed and the state of the lesion. When performing X-ray photography from the opposite direction, FIG.
As shown in (b), the positions of the X-ray tube 61 and the image intensifier 62 are switched, and X
A radiography will be performed.

[0005]

However, the above-mentioned conventional X-ray diagnostic apparatus has a problem that it is not easy to perform X-ray imaging from the opposite direction. When performing X-ray imaging from the opposite direction, the state of FIG. 13B is changed from the state of FIG. 13A by rotating the C-shaped arm 63 by 180 ° about the X axis as the rotation axis. However, at this time, the C-shaped arm 63 cannot be rotated 180 ° unless the top 60 is retracted once or the X-ray diagnostic apparatus is moved to a position outside the top 60. . Of course, after rotating the C-shaped arm 63 by 180 °, it is necessary to return the top board 60 or the X-ray diagnostic apparatus to the original position. As described above, in the case of the conventional X-ray diagnostic apparatus, when performing X-ray imaging from the opposite direction, it is extremely troublesome and not easy.

In view of the above circumstances, an object of the present invention is to provide an X-ray diagnostic apparatus which can easily perform X-ray imaging from the opposite direction.

[0007]

In order to achieve the above object, an X-ray diagnostic apparatus according to the present invention comprises an X-ray tube for irradiating an X-ray to a subject, and a X-ray tube for detecting a transmitted X-ray from the subject. In an X-ray diagnostic apparatus in which a X-ray detector and a C-shaped arm (C-shaped arm) are held, first and second detectors are attached to both ends of the C-shaped arm so as to face each other with a subject interposed therebetween. The second two X-ray tubes and the X-ray detection elements are arranged vertically and horizontally between the subject and the second X-ray tube at positions facing the first X-ray tube with the subject interposed therebetween. A first X-ray surface sensor as a transmission X-ray detector, and an X-ray detection element arranged vertically and horizontally between a subject and a first X-ray tube at a position opposed to a second X-ray tube with the subject interposed therebetween A second X-ray surface sensor as a transmitted X-ray detector Both together when X-ray irradiation according to 1X-ray tube is made is caused to retract the first 2X line surface sensor to a position which does not block the X-ray from the 1X-ray tube,
When X-ray irradiation is performed by the second X-ray tube, the first X-ray surface sensor is configured to be retracted to a position where the X-ray irradiated from the second X-ray tube is not blocked.

[Operation] Next, the operation of the X-ray diagnostic apparatus of the present invention when performing X-ray imaging will be described. In the case of the X-ray diagnostic apparatus of the present invention, there are two X-ray tubes, and either X-ray imaging with the first X-ray tube or X-ray imaging with the second X-ray tube is performed. The second X-ray tube sets the subject to be imaged of the subject at a position facing the opposite direction, and selects one of the first and second X-ray tubes as the used X-ray tube. It is now assumed that the first X-ray tube has been selected. And the first for transmission X-ray detection
The X-ray surface sensor is set between the subject and the second X-ray tube at a position opposite to the first X-ray tube with the subject interposed therebetween, and the second X-ray surface sensor is configured to emit X-rays from the first X-ray tube.
After being retracted to a position where the ray is not blocked, the subject is irradiated with X-rays from the first X-ray tube. Then, X-ray detection data is output from the first X-ray surface sensor along with X-ray irradiation to the subject, and an X-ray fluoroscopic image of the subject is obtained based on the X-ray detection data.

When the second X-ray tube is selected,
The second X-ray surface sensor for transmitted X-ray detection is set at a position facing the second X-ray tube with the subject interposed between the subject and the first X-ray tube, and conversely, the first X-ray surface sensor In this case, the subject may be retracted to a position where the irradiation X-rays from the second X-ray tube are not blocked, and then the subject may be irradiated with X-rays from the second X-ray tube.

[0010] The first X-ray tube and the second X-ray tube are opposed to each other,
Since the X-ray irradiation direction is reversed, the X-ray fluoroscopic image obtained by the first X-ray surface sensor and the X-ray fluoroscopic image obtained by the second X-ray surface sensor have a relationship in which the imaging directions are opposite. That is, in the X-ray diagnostic apparatus of the present invention, X-rays from the opposite direction
When performing the radiography, only the first and second X-ray surface sensors are moved, and the C-shaped arm does not need to be moved at all. Since the first and second X-ray surface sensors are thin and lightweight, two X-ray tubes and two X-ray surface sensors can be provided in one C-shaped arm. When an image intensifier is used as a transmission X-ray detector as in the prior art, since the image intensifier is a large heavy object, two X-ray tubes and two
It is not possible to equip a single C-arm with multiple image intensifiers and adopt a similar configuration of the present invention.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating the overall configuration of the X-ray diagnostic apparatus according to the embodiment. The X-ray diagnostic apparatus of FIG. 1 includes a top plate 1 on which a subject M is placed, and a first X-ray tube 2 and a second X-ray tube 3 for irradiating a patient (subject) M with X-rays. A first flat panel X-ray sensor (hereinafter, abbreviated as "first X-ray sensor") 4 for detecting transmitted X-rays in which X-ray detection elements are arranged vertically and horizontally and X-ray detection elements are arranged vertically and horizontally. Second for transmitted X-ray detection
A flat panel type X-ray sensor (hereinafter abbreviated as “second X-ray sensor”) 5 is provided in a form held by a C-shaped arm 6. Note that the top 1 is configured to be able to reciprocate in the body axis Z direction of the patient M.

The first X-ray tube 2 and the second X-ray tube 3 are attached and held at both ends of the C-shaped arm 6 so as to face each other with the patient M therebetween, and the first X-ray sensor 4 and the second X-ray tube The sensor 5 is mounted and held on screw rods (screw shafts) 7 and 8 provided inside the C-shaped arm 6. The C-shaped arm 6 is supported by the arm supporting portion 9 so as to reciprocate in an arc shape around the body axis Z of the patient M as shown by an arrow W1. Is attached to a base 10 provided on a carriage 11 so as to be able to rotate forward and backward in a direction indicated by an arrow W2 with the horizontal axis X as a rotation axis. The configuration is such that the inclination of the tube 2 and the X-ray tube 3 changes and the X-ray irradiation direction changes. As the carriage 11 moves, the two X-ray tubes 2 and 3 and the two X-ray sensors 4 and
It goes without saying that everything mounted on the base 10, such as the 5 and the C-arm 6, move together.

At the subsequent stage of the X-ray sensors 4 and 5, the X-ray detection data output from the X-ray sensors 4 and 5 is collected and sent to the image processing unit 15 via the sensor selection switch 14. First signal collecting unit 12 and second signal collecting unit 13
Is installed. An image processing unit 15 at the subsequent stage of the signal collecting units 12 and 13 includes an AD conversion unit 16 for converting X-ray detection data into a digital signal, a detection data memory 17 for storing digitized X-ray detection data, and a detection data memory. A data processing unit 18 that creates an X-ray image by performing necessary image processing such as edge enhancement and filtering on the X-ray detection data stored in the memory 17; and an X-ray image memory that stores the obtained X-ray image 19 is provided. Of course, during X-ray fluoroscopy, the X-ray images stored in the X-ray image memory 19 are continuously updated.

Each of the X-ray tubes 2 and 3 is configured to irradiate a patient M with X-rays according to set irradiation conditions such as a tube voltage and a tube current under the control of an irradiation control unit 20 including a high voltage generator and the like. Have been. The control by the irradiation control unit 20 is performed according to a command signal transmitted from the imaging control unit 23 in accordance with a setting operation from the keyboard 21 and the mouse 22. The top 1 is configured to be moved under the control of the top controller 24. The control by the top control unit 24 is also performed in accordance with a command signal transmitted from the imaging control unit 23 in accordance with a setting operation from the keyboard 21 and the mouse 22.

On the other hand, beside the top plate 1, an image display monitor 2 is provided.
5 is installed to display the X-ray image stored in the X-ray image memory 19, and the X-ray image stored in the X-ray image memory 19 is printed on a film and output as an image photograph. An image printing recording section (leather type imager) 26 is also provided. The photographing control unit 2 is operated by an operation input from the keyboard 21 or the mouse 22.
X-ray image memory 1 according to a command signal sent from
The X-ray image stored in 9 is output to and displayed on the image display monitor 25 or sent out from the image printing recording unit 26 as an image photograph.

Further, the reciprocating movement of the C-shaped arm 6 in the direction indicated by the arrow W1 and the forward / reverse rotation of the arm support 9 in the direction indicated by the arrow W2 are controlled by the arm control unit 27. The control by the arm control unit 27 is also performed by the keyboard 21 and the mouse 22.
This is performed according to a command signal sent from the imaging control unit 23 in accordance with the setting operation from.

Next, the configuration of the X-ray sensors 4 and 5 for outputting X-ray detection data will be specifically described. The arrangement of the X-ray detection elements in the X-ray sensors 4 and 5 includes, for example, a square matrix configuration in a horizontal (x) direction 1024 and a vertical (y) direction 1024. X-ray sensors 4 and 5
Is about 30 cm in length and width, for example. Since the X-ray sensors 4 and 5 have a rectangular planar shape, they can form a square detection surface suitable for photographing a large part such as the chest and abdomen, and have almost no image distortion around the image. And it has many advantages such as being thin and lightweight.

The X-ray sensors 4 and 5 are, as shown in FIG.
X-ray conversion layer 30 for converting incident X-rays into charges or light
3A and a detection array layer 31 in which elements for detecting charges or light generated in the X-ray conversion layer 30 are arranged vertically and horizontally in a matrix, and a direct conversion shown in FIG. There is a type sensor and an indirect conversion type sensor shown in FIG.

In the case of the former direct conversion type, the X-ray conversion layer 30 has a selenium layer or CdZ that directly converts incident X-rays into electric charges.
The charge detection electrode 32 is formed on the surface of the detection array layer 31 as a charge detection element 32, and the charge is collected by a charge collection electrode opposed to the surface electrode 33. The charge is detected and stored in the capacitor C1. The element 32, a part of the X-ray conversion layer 30 thereon and the capacitor C1
X-ray detection elements XD are formed.

In the latter case of the indirect conversion type, the X-ray conversion layer 30 is formed of a scintillator layer for converting incident X-rays into light, and the X-ray conversion layer 30 is provided with a photodiode formed as a light detection element 34 on the surface of the detection array layer 31. Is detected and stored in the capacitor C1, and one X-ray detection element XD is formed by each light detection element 34, a part of the X-ray conversion layer 30 thereon, and the capacitor C1.

In the X-ray sensors 4 and 5, as shown in FIG. 4, each of the X-ray detection elements XD,.
FT (Thin Film Transister) 35
Are connected to read wirings 36 and 37 running vertically and horizontally, and the read wirings 36 and 37 are connected to a horizontal read drive unit 38 or a vertical read drive unit 39, respectively. , 39 are sent. The identification of each X-ray detection element XD of the X-ray sensors 4 and 5 is sequentially assigned to each X-ray detection element XD along an array in the horizontal and vertical directions.
Since the scanning is performed based on the addresses of 〜１０1023, the scanning signal for reading is a signal for designating a horizontal address or a vertical address, respectively.

In accordance with the horizontal and vertical scanning signals, the readout wiring 36,
, XD, the X-ray detection signal is sequentially changed from the detection elements XD,.
Each of the preamplifiers 4 of the signal collecting units 12 and 13 passes through the readout wiring 37 from T35 and further as X-ray detection data for fluoroscopy.
0 and multiplexer 41.

From the above, the method of reading out the detection signals from the X-ray sensors 4 and 5 is almost the same as that of a video detector such as a normal TV camera. In the first embodiment, both readout driving units 38 and 39 constituting the signal collection units 12 and 13 are used.
In addition, the preamplifier 40 and the multiplexer 41 are also provided on the periphery of the surface of the detection array layer 31 of the X-ray sensors 4 and 5, and have a configuration that is further integrated.

A detection data memory 17 for storing X-ray detection data obtained from the X-ray sensors 4 and 5 and an X-ray image memory 19 for storing X-ray images are provided by the X-ray sensors 4 and 5. A frame memory type storage device having a matrix configuration corresponding to the vertical and horizontal matrix configuration of the detection elements XD is used.

The X-ray diagnostic apparatus of the embodiment is characterized in that the X-ray imaging by the first X-ray tube 2 and the second
The configuration is such that switching to X-ray imaging by the X-ray tube 3 is possible. In the case of X-ray imaging using the first X-ray tube 2, the first X-ray sensor 4 is connected to the patient M between the patient M and the second X-ray tube 3.
Is set to a position facing the first X-ray tube 2 across the X-ray tube, and the second X-ray sensor 5 is retracted to a position where the irradiation X-rays from the first X-ray tube 2 are not blocked, and X-ray imaging is performed. .

Conversely, in the case of X-ray photography using the second X-ray tube 3, the second X-ray sensor 5 is positioned between the patient M and the first X-ray tube 2 so as to face the second X-ray tube 3 with the patient M interposed therebetween. , And the first X-ray sensor 4 is retracted to a position where the irradiation X-rays from the second X-ray tube 3 are not blocked, and X-ray imaging is performed. X-ray photography using the first X-ray tube 2 and second X-ray
The switching to the X-ray imaging by the X-ray tube 3 is configured to be performed by the control of the imaging selection unit 28, and the control by the imaging selection unit 28 is also performed by the keyboard 2.
1 and a shooting control unit 23 in accordance with a setting operation from the mouse 22.
This is performed in accordance with the command signal sent from.

Next, a specific description will be given of a moving mechanism of the two X-ray sensors 4 and 5 which is required in accordance with the switching of the X-ray imaging. As shown in FIG. 5, the screw rods 7, 8 to which the X-ray sensors 4, 5 are attached can be independently rotated by the electric motors 42, 43 while being accommodated in the cylindrical cases 7a, 8a. Thus, the cylindrical cases 7a, 8
A is passed to the C-shaped arm 6 in the form of a serial arrangement in which the end faces a are in contact with each other. On the other hand, the screw rods 7, 8
Moving block 4 that moves up or down according to the forward / reverse rotation of 8
4 and 45 are screwed together and the cylindrical case 7
Windows 7b, 8b extending in the longitudinal direction are opened on the side surfaces of the moving blocks 44, 45, and the X-ray sensors 4, 5 are connected to the moving blocks 44, 45 by the connection bars 46, 47 through the windows 7b, 8b. It is in a combined state.

As a result, when the electric motor 42 rotates, as the moving block 44 moves, the connection bar 46 moves along the window 7b and at the same time the X-ray sensor 4 moves up and down. When the electric motor 43 rotates, the X-ray sensor 5 moves up and down at the same time as the connection bar 47 moves along the window 8b as the moving block 45 moves.

Further, as shown in FIG. 6, the windows 7b and 8b are bent laterally at the upper end and the lower end, and the X-ray sensor 4 which has descended is located on the right side as shown by a dashed line. The X-ray sensor 5 that has been turned to retreat to a position where it does not block the irradiation X-rays, and the ascending X-ray sensor 5 also turns to the right and retreats to a position where it does not block the irradiation X-rays, as indicated by the dashed line. Has become. Therefore, the X-ray sensors 4 and 5 are connected to the windows 7b and 8
When it is in the straight line area b, it means that it is at a position where it blocks the irradiated X-rays, that is, a position where it detects transmitted X-rays.

Subsequently, X of the embodiment having the above-described configuration is used.
The operation when X-ray imaging is performed by the X-ray diagnostic apparatus will be described with reference to the flowchart in FIG. Hereinafter, first, X-ray imaging by the first X-ray tube 2 is performed, and then X-ray imaging by the second X-ray tube 3 is performed. [Step S1] After placing the patient M on the top 1, the patient 1 is moved to set the patient M to the fluoroscopic position.

[Step S2] X-ray photography by the first X-ray tube 2 is selected and designated by an input operation from the keyboard 21 or the mouse 22.

[Step S3] As the screw rod 8 rotates, the second X-ray sensor 5 moves to the retracted position as shown in FIG. 7, and the first X-ray sensor 4 stays at the position where the transmitted X-ray can be detected. . At the same time, the sensor selection switch 14
It is set on the X-ray sensor 4 side.

[Step S4] When radiography is started by an input operation from the keyboard 21 or the mouse 22, X-rays are emitted from the first X-ray tube 2 to the patient M.

[Step S5] The data output from the X-ray sensor 4 in association with the X-ray irradiation is stored in the detection data memory 17, and image data processing is performed by the data processing section 18, so that the X-ray fluoroscopic image is obtained. The image is displayed on the screen of the monitor 25 and displayed.

[Step S6] Upon completion of the X-ray photography by the first X-ray tube 2, the keyboard 21 or the mouse 2
An X-ray imaging by the second X-ray tube 3 is selected and designated by an input operation from the second X-ray tube 2.

[Step S7] The screw rod 7 is rotated to move the first X-ray sensor 4 to the retracted position, as shown in FIG. 8, and the screw rod 8 is rotated to transmit the second X-ray sensor 5 as shown in FIG. Move to a position where X-rays can be detected. At the same time, the sensor selection switch 14 is set on the second X-ray sensor 5 side.

[Step S8] When radiography is started by an input operation from the keyboard 21 or the mouse 22, X-rays are emitted from the second X-ray tube 3 to the patient M.

[Step S9] The data output from the X-ray sensor 5 in association with the X-ray irradiation is stored in the detection data memory 17, and the image data processing is performed by the data processing unit 18, so that the X-ray fluoroscopic image is obtained. The image is displayed on the screen of the monitor 25 and displayed.

In the case of the X-ray diagnostic apparatus of the embodiment, the first X-ray tube 2 and the second X-ray tube 3 are opposed to each other, and the X-ray irradiation directions are reversed. The imaging directions of the fluoroscopic image and the fluoroscopic image obtained by the second X-ray sensor 5 are opposite. That is, in the X-ray diagnostic apparatus of the present invention, only the first and second X-ray sensors 4 and 5 are moved when performing X-ray imaging from the opposite direction.
There is no need to move the C-shaped arm 6. In addition, the weight load at both ends of the C-shaped arm 6 is balanced, and the movement of the C-shaped arm 6 becomes smooth.

Next, another embodiment of the present invention will be described with reference to the drawings. FIG. 10 is a block diagram illustrating a main configuration of an X-ray diagnostic apparatus according to another embodiment. In another embodiment, the X-ray sensors 4, 5 include support bars 51, 52.
The structure is exactly the same as that of the previous embodiment except that the electric motors 53 and 54 can be moved between the photographing position and the retracted position by the rotation of the electric motors 53 and 54. Description of other parts is omitted.

In the apparatus of another embodiment, in the case of X-ray photography using the first X-ray tube 2, as shown in FIG.
The X-ray sensor 4 is set at a position facing the first X-ray tube 2 with the patient M interposed between the patient M and the second X-ray tube 3, and the second X-ray sensor 5 is laterally moved by the electric motor 54. The X-ray imaging is performed by rotating and retreating to a position where the irradiation X-rays from the first X-ray tube 2 are not blocked.

On the other hand, in the case of X-ray photography using the second X-ray tube 3, as shown in FIG.
The electric motor 54 connects the patient M and the second X-ray sensor 5 to the patient M.
And the first X-ray tube 2 is moved to a position facing the second X-ray tube 3 with the patient M interposed therebetween.
Evacuate the X-ray from the X-ray tube 3 to a position where it does not block,
X-ray photography is performed. In the case of the X-ray diagnostic apparatus of another embodiment shown in FIG. 10, the weight loads at both ends of the C-shaped arm 6 are balanced, and the movement of the C-shaped arm 6 is smooth.

The present invention is not limited to the above embodiment, but can be modified as follows. (1) Although the X-ray tubes 2 and 3 have the same configuration in the above two embodiments, the types of the X-ray tubes 2 and 3 may be different. The X-ray tube 2 is a stereo X-ray tube from which a high-quality image with a small focus size can be obtained.
As a modified example, an X-ray tube having a large output capacity capable of continuous operation for a long time and having a configuration capable of performing both stereo imaging and long-time fluoroscopy with a single device is cited.

As a modified example, an apparatus having a configuration in which the X-ray energies irradiated by the X-ray tube 2 and the X-ray tube 3 are different from each other is mentioned. By attaching different filters to the front surfaces of the X-ray tube 2 and the X-ray tube 3, X-ray energies can be made different.
Alternatively, the X-ray energy can be made different by making the target materials of the X-ray tube 2 and the X-ray tube 3 different.

When the energies of the X-rays emitted from the X-ray tube 2 and the X-ray tube 3 are different, an image using a high-energy X-ray that easily captures bone tissue and a low-energy X that easily captures soft tissue are used.
By performing subtraction processing with appropriate weighting between the image and the line image, an image of only bone tissue or an image of only soft tissue can be obtained.

(2) In the case of the embodiment, the head DS
A clear image can be easily obtained when it is also used for A photography. As shown in FIG. 12A, the X-ray sensor 4 is set at the imaging position, the X-ray sensor 5 is set at the retracted position, and the selectively imaged imaging part Ma on the left side of the head is placed in the X-ray direction.
After photographing with the X-ray sensor 2 and the X-ray tube 2, FIG.
As shown in (b), the X-ray sensor 4 is set at the retreat position, the X-ray sensor 5 is set at the imaging position, and the selectively imaged imaging region Mb on the right side of the head is placed in the X-ray tube 3. And an image is taken by the X-ray sensor 5. By moving only the positions of the X-ray sensors 4 and 5, the X-ray sensors 4 and 5 become closer to the imaging parts Ma and Mb, and a clear image can be obtained.

(3) The X-ray diagnostic apparatus of the present invention
Or a configuration without the monitor 25 may be used.
The configuration may be such that the character-shaped arm is not mounted on a trolley, but is installed on a suspension support that can travel on the ceiling.

(4) In both embodiments, the X-ray sensors 4 and 5 are moved using the driving force of the electric motor. However, the X-ray sensors 4 and 5 are moved manually. As a modified example.

[0049]

According to the X-ray diagnostic apparatus of the present invention, two X-ray tubes and two X-ray surface sensors are provided on the C-shaped arm with the subject interposed therebetween. It is possible to reverse the X-ray irradiation direction and perform X-ray imaging simply by moving the camera between the imaging position and the retreat position, so that X-ray imaging from the opposite direction can be easily performed. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an overall configuration of an X-ray diagnostic apparatus according to an embodiment.

FIG. 2 is a perspective view showing a schematic configuration of a flat panel X-ray sensor.

FIG. 3 is a sectional view showing a layer structure of a flat panel X-ray sensor.

FIG. 4 is a block diagram showing a circuit configuration around a flat panel X-ray sensor.

FIG. 5 is a cross-sectional view showing a mounting structure of an X-ray sensor of the embodiment device.

FIG. 6 is a perspective view showing a mounting structure of an X-ray sensor of the apparatus of the embodiment.

FIG. 7 is a schematic diagram showing a state at the time of X-ray imaging using a first X-ray tube according to the embodiment.

FIG. 8 is a schematic diagram showing a state at the time of X-ray imaging using a second X-ray tube of the embodiment.

FIG. 9 is a flowchart illustrating a series of flows of an X-ray imaging operation performed by the embodiment device.

FIG. 10 is a block diagram illustrating a main configuration of a device according to another embodiment.

FIG. 11 is a schematic diagram showing a state at the time of X-ray imaging by another embodiment apparatus.

FIG. 12 is a schematic diagram illustrating a state during head DSA imaging by the example apparatus.

FIG. 13 is a block diagram showing a configuration of a main part of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Top plate 2 ... 1st X-ray tube 3 ... 2nd X-ray tube 4 ... 1st X-ray sensor 5 ... 2nd X-ray sensor 6 ... C-shaped arm M ... Patient XD ... X-ray detection element

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Wataru Miyamoto 1 Nishinokyo Kuwabaracho, Nakagyo-ku, Kyoto, Japan Inside the Sanjo Plant of Shimadzu Corporation (72) Inventor Tetsuo Imanishi 1 Shizuzu, Nishinokyo-kuwaharacho, Nakagyo-ku, Kyoto Co., Ltd. Sanjo factory

Claims (1)

[Claims] An X-ray tube for irradiating a subject with X-rays and a transmission X-ray detector for detecting transmitted X-rays from the subject are held by a C-shaped arm (C-arm). In an X-ray diagnostic apparatus, first and second two X-ray tubes are attached to both ends of a C-shaped arm so as to face each other with a subject interposed therebetween; A first X-ray surface sensor as a transmission X-ray detector in which the X-ray detecting elements are arranged vertically and horizontally and arranged at a position facing the first X-ray tube with the subject interposed therebetween; A second X-ray surface sensor as a transmission X-ray detector, which is arranged at a position facing the second X-ray tube with the subject interposed between the X-ray tubes and in which X-ray detection elements are arranged vertically and horizontally. And when X-ray irradiation by the first X-ray tube is performed, The first X-ray surface sensor is moved to the second X-ray surface when the X-ray is irradiated by the second X-ray tube.
An X-ray diagnostic apparatus characterized in that the X-ray diagnostic apparatus is configured to be retracted to a position that does not block irradiation X-rays from a ray tube.