JPH01274740A - Radiant ray perspective photographing device - Google Patents

Abstract

PURPOSE:To form an image having the stable and optimum concentration in a short time by detecting the turning-up/down angle, introduction of a pressing cylinder, photographing format, etc., and judging the kind of a formed image and determining the reading-out condition corresponding to the kind and carrying out the image processing under the image processing condition corresponding to the kind of the image. CONSTITUTION:When the esophagus of a patient is photographed, the longitudinally long irradiation field is set by a diaphragm 8 since the esophagus is slender. The patient 3 is set at an erection state (90 deg.) and X-ray photograph is carried out for the patient who drinks a contrast medium. When a bed 1 is set in erected state (90 deg.), the turning-up/down angle is detected by a turning-up/down angle detector 2, and a detection signal s1 is outputted. When the photographing format in two division or three division in the lateral direction is selected, a detection signal s3 is outputted by a photographing format detector 23. When an image kind judging circuit 30 judges the esophagus photographing, the image of the esophagus is automatically outputted onto a reading-out device 31, in which the reading-out condition 1 corresponding to the image of the esophagus is determined. Further, similarly to the reading-out, an image processing device 32 carries out the image processing according to the optimum image processing conditions 1 for the image of the esophagus.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a radiographic fluoroscopic imaging device used in a radiation image information recording and reproducing system.

(Prior Art) In a radiographic image information recording and reproducing system, pre-reading is performed to read an outline of image information prior to actual reading by a reading means. That is, based on the image information obtained by pre-reading, the reading conditions for the main reading are determined, the main reading is performed according to these, and the image processing means outputs an optimal image corresponding to the imaged part and the like. Also, JP-A-60-
In Japanese Patent No. 156055, the range of reading, that is, the range of image information, is determined from histogram analysis of pre-read data. In this method, the area to be imaged, method, and menu are selected in advance, and based on this, the area to be imaged is determined from the histogram.
A reading condition determination method is set for each method and menu, and an optimal image is output under the corresponding image processing conditions. That is, the method recognizes a histogram pattern characteristic of the imaging region and method selected in the menu, and determines the optimal reading conditions for the imaging region and method.

(Problems to be Solved by the Invention) However, the above conventional method has the following problems. That is, as described above, an optimal image may not be obtained depending on the imaging site, method, or menu. For example, in the case of an xssm image examination of the stomach, approximately 10 xs*m images are performed on - people. These 10
The images include the esophagus, a filling image, a double contrast image, a compression image, etc., and these images are used for the single imaging site and method described above.

If reading and image processing are performed using the menu, errors will occur, making it impossible to obtain a stable and optimal S-degree image.

Therefore, as a solution, esophagus, fullness image, double contrast image,
All you have to do is add a menu such as compression images.

However, - patient Xll1! There is a problem in that it is necessary to switch the menu in the middle of the shadow examination, and the switching operation by the operator becomes complicated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a radiographic fluoroscopic imaging device that can create stable images with optimal density in a short time, reduce the operational burden on the operator, and improve diagnostic efficiency.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems and achieve the objects, the present invention takes the following measures. That is, the present invention provides a first detection means for detecting information regarding the state of the bed, such as the tilting angle of the bed and the coming and going of the compression tube, and a second detection means for detecting information regarding the imaging conditions such as the number of images to be taken and the imaging format. , various condition detection means including a third detection means for detecting information related to radiation exposure and image input such as aperture opening and fluoroscopic video signals, and based on each detection signal from the various condition detection means,
The apparatus includes image type determination means for determining the type of generated image, outputting corresponding reading conditions to the reading device, and outputting corresponding image processing conditions to the image processing device.

(Effects) By taking such measures, the following effects are achieved. According to the present invention, the various condition detection means detect the tilting angle, the entrance/exit of the compression tube, the imaging format, etc., and the image type determination means determines the type of generated image based on the detection signal, and the type of the image is determined by the image type determination means. Reading conditions corresponding to the image are determined, and the image is further processed under image processing conditions corresponding to the type of image. Therefore, even when performing a series of X-rays, images with stable and optimal density can be created in a short time without switching between complicated menus, and the operational burden on the operator is reduced. This makes it possible to improve photographing efficiency.

(Example) Fig. 1 shows the radio IMm transmission according to the present invention. This is a schematic configuration diagram showing one embodiment of the II imaging apparatus, FIG. 2 is a side view of the embodiment, and FIG. 3 is a block diagram showing the radiographic I imaging apparatus 11m system. This radiation expert? J! The imaging device is, for example, an X-ray imaging device, and is configured as follows.

A patient 3 is placed on a top plate 2 on the bed 1, and an X-ray tube 4 is placed above the patient 3 so as to irradiate the patient 3 with XI. Image intensifier (r, I
) 5, TV camera 6, spot shot device 7 is the patient 3
The X-ray tube 4 is disposed at the lower part of the X-ray tube 4 so as to face the X-ray tube 4.

'#J and Is are for converting and amplifying the xtm signal into an optical signal, and the TV camera 6 is for converting the optical signal into a TV video signal. The spot shot device 7
The transmission image of the patient 3 is transferred to an imaging plate (IP).
This is what is photographed.

Bed 1 is for patient 3. X-ray tube4. The entire structure can be raised and lowered in the direction of the arrow A without changing the relative positions of I, 15, etc. Therefore, for example, in the case of a photographic examination of the gastrointestinal tract, the contrast medium is moved to the target position by raising and lowering the apparatus main body 1, and the IP (not shown) is moved to the photographing position and photographed to obtain a photographed image. It has become a thing. Aperture 8
The X-ray irradiation field is controlled to a desired size according to the imaging format selected by the spot shot device 7. In addition, when the xII irradiation field of the aperture 8 is made small, the operation can be controlled using an operation section of a separate device. For example, the diaphragm 8 is used to prevent halation between the II5 and the TV camera 6 due to the incidence of strong X-rays that do not pass through the patient 3, or to prevent unnecessary X-rays from being emitted when photographing a part close to the patient's body side. It is used to prevent X-ray exposure due to

On the other hand, as shown in FIG. 2, a column 9 supporting the X-ray tube 4
A compression tube 10 for compressing the patient 3 is attached to the. The compression tube 10 is operated by an operation section (not shown) and moves in and out in the direction of arrow B to compress the patient 3 when necessary, forcibly moving the contrast agent inside the patient's body to the target position and producing a desired compression image. It's supposed to work as expected.

The X-ray fluoroscopic imaging apparatus control system in FIG. 3 is configured as follows.

The various condition detection means 20 is composed of a tilting angle detector 21, a compression tube entry/exit detector 22, an imaging format detector 23, an image number counter 24, an aperture opening degree detector 25, and a fluoroscopic video signal detector 26. . The tilting angle detector 21 has a potentiometer attached to the tilting drive unit, for example, and continuously detects the tilting angle from a reverse tilt to a horizontal position to a standing position, and outputs a detection signal S.
It outputs 1.

Alternatively, the tilting angle detector 21 may be equipped with a microswitch that independently detects reverse tilting and standing position, for example. The compression tube in/out detector 22 includes a microswitch in the compression tube in/out drive section, detects whether or not the compression tube 10 is out, and outputs a detection signal S2. The photographing format detector 23 detects the photographing format selected by the operation section and outputs a detection signal S3. The photographed image number counter 24 counts the number of photographed fluoroscopic images and outputs a detection signal S4. The aperture opening degree detector 25 detects the aperture opening degree of the aperture 8 and outputs a detection signal S.
The perspective video signal detector 26 detects the perspective video signal and outputs a detection signal S6.

The image type determination circuit 30 inputs various detection signals 61 to S6 from the various condition detection means 20, and determines a series of XI of the patient.
! Foodie in photography, compression image, fullness, image, double contrast image,
Generating a double contrast oblique image Determines the type of image, outputs reading conditions corresponding to this image type to the reading device 31, and outputs image processing conditions corresponding to the image type to the image processing device 32. It is something to do. The reading device 31 has optimal reading conditions corresponding to the esophagus, compression image, fullness image, double contrast image, and double contrast oblique image, that is, reading conditions 1 to 1.
4 is stored in advance. Image processing device 3
2 performs image processing under optimal image processing conditions, that is, image processing conditions 1 to 4, corresponding to the esophagus, compression image, filling image, double contrast image, and double contrast oblique image.

FIG. 4 is a flowchart for explaining the operation of the embodiment, and the operation will be explained with reference to the same figure.

First, when photographing a patient's esophagus, since the esophagus is long and thin, a vertically elongated irradiation field is set using the aperture 8. Then, patient 3 is placed in a standing position (90"), and patient 3 drinks a contrast agent and an X-ray image is taken. Here, (1) when bed 1 is placed in a standing position (tilting angle 90°), The tilting angle detector 21 detects the tilting angle and outputs a detection signal S1 (step CI).Also, when the shooting format of 2 left and right splits or left and right 3 splits is selected, the shooting format detector 23 outputs a detection signal S1. A detection signal S3 is output (step C3).

Alternatively, if the opening degree of the irradiation field diaphragm is twice or more longer in the longitudinal direction than the width, the diaphragm opening degree is detected (step C5). When the above-mentioned (11(2)) is satisfied at the same time, the image type determination circuit 30 determines that it is an esophageal radiography (step D).Then, the image of the esophagus is automatically transferred from the image type determination circuit 30 to the reading device 31. The reading condition 1 corresponding to the esophagus image is determined in the reading device 31 (step E1).

Furthermore, similarly to this reading, the image processing device 32 performs image processing under image processing conditions 1 that are optimal for images of the esophagus (step F1).

Next, when taking a compression image of the patient 3, the compression image is taken by using the compression tube 10, so the compression tube entrance/exit detector 22 detects the entrance/exit of the compression tube 10, and the reading device 31 displays the compression image. is output as Reading device! In step 131, reading condition 2 corresponding to the compression image is determined (step E2). Furthermore, in the same way as this reading, the image processing device fl
At f32, image processing is performed under image processing conditions 2 that are optimal for the compression image (step F2).

When photographing a full image of patient 3, the patient is usually photographed in a standing position in a full-size photographing format. That is, (1) when the bed 1 is placed in the upright position, the tilting angle is detected by the tilting angle detector 21 and a detection signal S1 is output (step CI)
. Furthermore, when the ('2J full size division format is selected, the detection signal S3 is detected by the photographing format detector 23 (step C3). Then, (1) (2
) are satisfied at the same time, the image is determined as a full image by the image type determining circuit 30, and the full image is output to the reading device 31. In the reading device 31, reading conditions 3 corresponding to the full image are determined (step E3). Furthermore, similarly to this reading, the image processing device 32 performs image processing under image processing conditions 3 that are optimal for a full image (step F3).

On the other hand, depending on the imaging procedure, even if the couch 1 is in an upright position and full format imaging is performed, the image may not be a full image. However, since the filling image is taken before the effervescent agent required for the double contrast image is taken - it is taken early in the series of images of the patient. That is, Xl for the same patient! If the image is taken earlier than, for example, the fourth image, it is determined to be a full image, and the image is output to the reading bag [31 and subjected to image processing in the same manner as described above.

Therefore, it is possible to determine whether the image is an esophagus, compression image, or filling image based on the combination of the tilting angle, the compression tube going in and out, the imaging format, or the detection signal of the imaging number counter.In other cases, it is assumed that the image is a double contrast image. The various images can be read and processed under optimal reading conditions for the various images.

On the other hand, when photographing the oblique view of the gastrointestinal tract, sufficient diagnostic information cannot be obtained from images taken only from the front, so the photograph is taken from an oblique direction. In this case, there are X-rays that are directly incident without passing through the patient. When the directly incident X-rays are present, halation is likely to occur even in a perspective image between 1 and 15 and the TV camera 6, so the irradiation field is controlled by the diaphragm 8. That is, a potentiometer for detecting the size of the irradiation field is attached to the diaphragm 8, and the irradiation field can be known at all times, so that it is determined whether or not the patient is oblique based on the detection signal S5. Using this detection signal S5, when the irradiation field size during fluoroscopy immediately before imaging is smaller than the automatically set size, it is determined that the patient is oblique, and the image is output to the reading device 31 as a double contrast oblique image. Ru.

Or 1. It is also possible to detect a fluoroscopic video signal by the 15-TV camera 6, detect directly incident X-rays, and determine that it is a double contrast oblique image.

As described above, according to this embodiment, the various condition detection means 20 detects the tilting angle, the entrance/exit of the compression tube, the imaging format, etc., and the image type determination circuit 30 determines the type of generated image based on the detection signal. Then, reading conditions corresponding to the type of image are determined, and the image is further processed under image processing conditions corresponding to the type of image. therefore,
Even when performing a series of X-rays, images with stable and optimal density can be created in a short time without having to switch through complicated menus, and the operational burden on the operator can be reduced. It becomes possible to improve photographing efficiency. For example, the images required for gastric examination can be determined from various conditions of the imaging device, such as the five characteristic esophagus, compression image, filling image, double contrast image frontal, and double contrast image diagonal, and can be read from the imaging device. Device 31, image processing bag r! ! 132, various images can be read and processed optimally, and stable diagnostic images can be obtained.

Note that the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] According to the present invention, a bed detection means detects the tilting angle of the bed and the coming and going of the compression tube, a recording medium detection means detects the number of shots and the shooting format, and the aperture opening degree and the fluoroscopic video signal are detected. An imaging condition detection means is provided with an X-ray source detection means for detecting various imaging conditions, and a detection signal is inputted from the imaging condition detection means to determine the type of image such as esophagus, filling image, double contrast image, compression image, etc. and outputs a plurality of reading conditions corresponding to the image type to the reading device, and outputs a plurality of image processing conditions corresponding to the image type to the image processing device. Since it is possible to create various images with stable and optimum density in a short period of time and to reduce the operational burden on the operator, it is possible to provide a radiographic fluoroscopy apparatus that can improve diagnostic efficiency.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of a radiographic shaping apparatus according to the present invention, and FIG. 2 is a side view of the embodiment,
FIG. 3 is a block diagram of the radiographic imaging apparatus control system;
FIG. 4 is a flow diagram for explaining the operation of the embodiment. 1...Bed, 2...Top plate, 3...Patient, 4...
X-ray tube, 5... Image intensifier, 6...
TV camera, 7... spot shot device, 8...
Aperture, 9... Support column, 10... Compression tube, 20... Various condition detection means, 21... Lifting angle detector, 22...
・Compression cylinder entrance/exit detector, 23... Shooting format, 2
4... Number of shots counter, 25... Aperture opening detector, 26... Fluoroscopic video signal, 30... Image type determination circuit, 31... Reading device, 32... Image processing device,
E1-E4...Reading conditions 1-4, F1-F4...Image processing conditions 1-4゜Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Claims] A first detection means for detecting information regarding the state of the bed such as the tilting angle of the bed and the coming and going of the compression cylinder, a second detection means for detecting information regarding the photographing conditions such as the number of images to be taken and the photographing format, an aperture opening, Various condition detection means includes a third detection means for detecting information regarding radiation exposure and image input such as a fluoroscopic video signal, and the type of generated image is determined based on each detection signal from the various condition detection means. and image type determining means for outputting corresponding reading conditions to the reading device and outputting corresponding image processing conditions to the image processing device;
A radiofluoroscopic imaging device characterized by comprising: