JPH0481452B2 - - Google Patents

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 radiation image information recording and reproducing system,
Prior to the actual reading by the reading means, pre-reading is performed to read the outline of the image information. That is, based on the image information obtained by pre-reading, reading conditions for main reading are determined, and main reading is performed according to these,
The image processing means outputs an optimal image corresponding to the imaged part and the like. Further, in Japanese Patent Application Laid-Open No. 156055/1983, the reading range, that is, the range of image information is determined from a histogram analysis of pre-read data. In this method, the region to be imaged, method, and menu are selected in advance, and the reading condition determination method is set for each region, method, and menu based on the histogram, and the optimal image is output under the corresponding image processing conditions. It has become a common thing. That is, in the method, the imaging region selected in the menu,
It recognizes the histogram pattern characteristic of the method and determines the optimal reading conditions for the region to be imaged and the 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 stomach X-ray examination, around 10 X-rays are required for one patient.
Line photography is performed. These 10 images include the esophagus,
Includes filling images, double contrast images, compression images, etc.
If these images are read and processed using the single imaging site, method, and menu described above, errors will occur, making it impossible to obtain images with stable and optimal density.

Therefore, a solution to this problem is to add menus such as esophagus, filling image, double contrast image, and compression image.
However, there is a problem in that it is necessary to switch menus during the X-ray examination of one patient, making the switching operations complicated by the operator.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a radiographic imaging apparatus that can create stable images with optimal density in a single 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 radiographic imaging apparatus of the present invention detects the tilting angle of the bed,
A detection means for detecting the entrance and exit of the compression tube, detecting the imaging format, counting the number of images to be taken, detecting the aperture opening, and detecting a fluoroscopic video signal; The system determines the type of radiographic image taken, and at least confirms that it is a three-dimensional image and a divided image, and that the aperture plate length is set in the longitudinal direction rather than the width direction. When at least one of these conditions holds, it is determined that the image is an esophageal image, and when the compression tube is protruding, it is determined that the image is a compression image. and the number of captured images is less than or equal to a predetermined number, the image is determined to be a full image, and the image is determined to be the esophagus image, the image is determined to be the compression image, and the image is determined to be the full image. If neither of the two conditions apply, it is determined that the image is a double contrast image.
A determination means for determining that the irradiation field size during fluoroscopy immediately before imaging is smaller than the input size of the image intensifier, and an image corresponding to the type of radiographic image specified by the determination means. Selecting a reading condition from among a plurality of image reading conditions stored in advance and corresponding to the type of radiation image, and applying the selected image reading condition to an image reading device that reads the radiation image from the radiation recording medium. An image reading condition output means selects an image processing condition corresponding to the type of radiation image specified by the determination means from among a plurality of image processing conditions corresponding to the type of radiation image stored in advance, and selects the image processing condition corresponding to the type of radiation image specified by the determination means. The selected image processing conditions are
An image processing condition output means for providing an image processing condition to an image processing apparatus that processes the radiation image.

(Effects) By taking such measures, the following effects will be exhibited. According to the present invention, by monitoring the settings of the bed, spot shot device, X-ray device, etc. that are actually set to predetermined conditions at the time of imaging, the radiation image recorded on the radiation recording medium can be It is automatically determined whether the image is a full image, a full image, a double contrast image, or a double contrast oblique image, and according to this determination, the image reading conditions corresponding to the image type are automatically set to the image reading device. and, according to this determination, image processing conditions corresponding to the type of image are automatically provided to the image processing device. 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 between complicated menus, and with less operational burden on the operator. Since it is possible to reduce this, it is possible to improve photographing efficiency. In particular, even when a series of imaging is performed continuously on one patient such as in gastric examination, it is possible to always obtain stable and optimal images by eliminating the need for complicated menus of imaging sites or methods. I can do it.

(Embodiment) FIG. 1 is a schematic configuration diagram showing an embodiment of a radiographic imaging apparatus according to the present invention, FIG. 2 is a side view of the embodiment, and FIG. 3 is a control system of the radiographic imaging apparatus. FIG. This radiographic imaging device is, for example, an X-ray imaging device, and is configured as follows. A top plate 2 on the bed 1 is for placing a patient 3 on it, and an X-ray tube 4 is arranged above the patient 3 so as to irradiate the patient 3 with X-rays. Image Intensifier (II) 5, TV
A camera 6 and a spot shot device 7 are arranged below the patient 3 so as to face the X-ray tube 4. The I.I 5 converts and amplifies the X-ray signal into an optical signal, and the TV camera 6 converts and amplifies the optical signal.
It converts it into a TV video signal. The spot shot device 7 projects a transmitted image of the patient 3 onto an imaging plate (IP). The entire bed 1 can be raised and lowered in the direction of the arrow A without changing the relative positions of the patient 3, the X-ray tube 4, the I.I. 5, etc. Therefore, for example, in the case of a photographic examination of the gastrointestinal tract, the contrast agent 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 photographing is performed. It has become possible to obtain images. The aperture 8 controls the X-ray irradiation field to a desired size according to the imaging format selected by the spot shot device 7. In addition, when the X-ray irradiation field of the diaphragm 8 is made small, the operation can be controlled by an operation section of a separate device. For example, the aperture 8 is used to prevent halation between the II 5 and the TV camera 6 due to the incidence of strong X-rays that do not pass through the patient 3, or to prevent wasted X-rays when photographing a part close to the patient's body.
It is used to prevent exposure to X-rays due to radiation exposure.

On the other hand, as shown in FIG. 2, a compression cylinder 10 for compressing the patient 3 is attached to the support column 9 supporting the X-ray tube 4. This compression tube 10 is operated by an operation part (not shown) and moves in and out in the direction of arrow B to compress the patient 3 when necessary, forcibly moving the contrast medium inside the patient's body to the target position and producing a desired compression image. It is designed 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 includes a tilting angle detector 21,
Compression tube entry/exit detector 22, imaging format detector 23, number of shots counter 24, aperture opening detector 2
5. Consists of a perspective video signal detector 26. The tilting angle detector 21 includes, for example, a potentiometer attached to the tilting drive unit, and continuously detects the tilting angle from reverse tilt to horizontal to standing position, and outputs a detection signal S1. Or tilt angle detector 2
1 is a type in which a micro switch is attached to detect, for example, a reverse tilt and a standing position independently. The compression tube in/out detector 22 is provided with a micro switch 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.
This outputs the following. The photographed image counter 24 counts the number of photographed fluoroscopic images and outputs a detection signal S4. The aperture opening detector 25 detects the aperture opening of the aperture 8 and outputs a detection signal S5, and the perspective video signal detector 26 detects a perspective video signal and outputs a detection signal S6. be.

The image type determination circuit 30 inputs various detection signals S1 to S6 from the various condition detection means 20, and receives various detection signals S1 to S6 from the various condition detection means 20, and detects esophagus, pressure, fullness image, double contrast image, and double contrast oblique image in a series of X-ray images of a patient. Image generation The type of image is determined, reading conditions corresponding to this image type are output to the reading device 31, and image processing conditions corresponding to the image type are output to the image processing device 32.
This is what is output to. The reading device 31 stores in advance optimal reading conditions, that is, reading conditions 1 to 4, corresponding to the esophagus, compression image, filling image, double contrast image, and double contrast oblique image. . The image processing device 32 processes images 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, the patient 3 is placed in a standing position (90 degrees), and the patient 3 drinks a contrast agent and an X-ray image is taken. here
(1) When the bed 1 is placed in the upright position (tilting angle 90°), the tilting angle is detected by the tilting angle detector 21 and a detection signal S1 is output (step C1). When a two-split or left-right three-split shooting format is selected, the shooting format detector 23
Detection signal S3 is output (step C
3). Alternatively, if the opening of the irradiation field diaphragm is twice or more longer in the longitudinal direction than the width, the opening of the irradiation field is detected (step C5). When the conditions (1) and (2) are satisfied at the same time, the image type determining circuit 30 determines that the image is an esophagus photograph (step D). The image of the esophagus is automatically output from the image type determination circuit 30 to the reading device 31, and the reading condition 1 corresponding to the image of the esophagus is determined in the reading device 31 (step E1). Furthermore, in the same way as 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 In the reading device 31, reading conditions 2 corresponding to the compression image are determined (step E2). Furthermore, in the same way as this reading, the image processing device 32 performs image processing 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 full-size photographing format. i.e.
(1) When the bed 1 is placed in the standing position, the tilting angle detector 21
The tilt angle is detected and a detection signal S1 is output (step C1). Furthermore, when the first division format of the full size (2) is selected, the detection signal S3 is detected by the photographing format detector 23 (step C3). When (1) and (2) are satisfied at the same time, the image type determining circuit 30 determines the image as a full image, 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, in the same way as this reading, the image processing device 32 performs image processing under the image processing condition 3 that is optimal for a full image (step F3).

On the other hand, depending on the imaging procedure, even if the bed 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 taking the foaming agent required for the double contrast image, it is taken at the beginning of a series of images for one patient. That is, if the X-ray image is taken earlier than, for example, the fourth image of the same patient, it is determined to be a full image, and the image is output to the reading device 31 and subjected to image processing in the same manner as described above.

Therefore, by combining the elevation angle, compression cylinder entrance/exit, imaging format, or detection signal from the imaging number counter, it is possible to determine whether it is an esophagus, compression image, or filling image, and in other cases, a double contrast image. It is possible to read and process the images 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-ray is present, I.I5
- The irradiation field is controlled by the diaphragm 8 because halation is likely to occur even in a perspective image obtained between the TV camera 6 and the TV camera 6. That is, a potentiometer for detecting the size of the irradiation field is attached to the diaphragm 8, and since the irradiation field can be known at all times, it is determined whether the patient is oblique or not based on the detection signal S5. Using this detection signal S5, when the irradiation field size is smaller than the automatically set size during fluoroscopy immediately before imaging, it is determined that oblique vision is present, and the image is output to the reading device 31 as a double contrast oblique image. . Alternatively, a fluoroscopic video signal from the I.I5-TV camera 6 may be detected to 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 and exit of the compression tube, the imaging format, etc., and the image type determination circuit 30
The type of generated image is determined based on the detection signal, 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 between complicated menus, and with less operational burden on the operator. It is possible to reduce this and improve photographing efficiency. For example, the images required for gastric examination include five characteristic images of the esophagus, compression image, filling image,
The frontal double contrast image and the oblique double contrast image can be determined from various conditions of the imaging device, and are output from the imaging device to the reading device 31 and image processing device 32 to optimally read and process the various images. It is possible,
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, the tilting angle of the bed is detected, the coming and going of the compression tube is detected, the imaging format is detected, the number of shots is counted, the aperture opening is detected,
A detection means for detecting a fluoroscopic video signal, and a type of radiation image recorded on a radiation recording medium based on the output of the detection means, and at least three-dimensional imaging, divided imaging, and three-dimensional imaging. It is determined that the image is an esophageal image when at least one of the following conditions holds true: the length of the aperture plate is set in the longitudinal direction rather than the width direction, and the image is determined to be a compression image when the compression tube is protruding. The image is determined to be a full image when at least one of the following is true: 3D imaging and full size imaging, and 3D imaging and full size imaging, and the number of images is less than or equal to a predetermined number. , determining that the image is a double contrast image when none of the determination that the image is an esophageal image, the determination that the image is a compression image, and the determination that the image is a filling image are applicable;
A determination means for determining that the irradiation field size during fluoroscopy immediately before imaging is smaller than the input size of the image intensifier, and an image corresponding to the type of radiographic image specified by the determination means. Selecting a reading condition from among a plurality of image reading conditions stored in advance and corresponding to the type of radiation image, and applying the selected image reading condition to an image reading device that reads the radiation image from the radiation recording medium. An image reading condition output means selects an image processing condition corresponding to the type of radiation image specified by the determination means from among a plurality of image processing conditions corresponding to the type of radiation image stored in advance, and selects the image processing condition corresponding to the type of radiation image specified by the determination means. The selected image processing conditions are
An image processing condition output means to be provided to an image processing device that processes the radiation image; Since various images with stable and optimal density can be created in a short time, and the burden of operation on the operator can be reduced, diagnosis is possible. A radiographic imaging apparatus that can improve efficiency can be provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of the radiographic imaging apparatus according to the present invention, FIG. 2 is a side view of the embodiment, and 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...Spotshot device, 8...Aperture, 9...
Support column, 10... compression tube, 20... various condition detection means,
21... Lifting angle detector, 22... Compression tube entry/exit detector, 23... Imaging format, 24... Capture number 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.

Claims (1)

[Scope of Claims] 1. Detection of the tilting angle of the bed, the coming and going of the compression cylinder, the detection of the imaging format, the counting of the number of shots, the detection of the aperture opening, and the detection of a fluoroscopic video signal. and a means for determining the type of radiation image recorded on the radiation recording medium based on the output of the detection means, which determines the type of radiation image recorded on the radiation recording medium based on the output of the detection means. When at least one of the conditions in which the length of the diaphragm plate is set in the longitudinal direction holds true, it is determined that the image is an esophageal image, and when the compression tube is protruding, it is determined that the image is a compression image. Determining that the image is a full image when at least one of the following is true: full-size photography, stereoscopic photography, full-size photography, and the number of images taken is a predetermined number or less,
When none of the above-mentioned esophageal image, compression image, and filling image are applicable, it is determined that it is a double-contrast image, and the irradiation during fluoroscopy immediately before imaging is performed. A determination means for determining that it is a double contrast oblique image when the field size is smaller than the input size of the image intensifier, and image reading conditions corresponding to the type of radiographic image specified by this determination means are stored in advance. image reading condition output means for selecting from among a plurality of image reading conditions corresponding to the type of radiation image, and applying the selected image reading condition to an image reading device that reads the radiation image from the radiation recording medium; Selecting an image processing condition corresponding to the type of radiation image specified by the determination means from among a plurality of image processing conditions corresponding to the type of radiation image stored in advance, and using the selected image processing condition,
A radiographic fluoroscopic imaging apparatus comprising: image processing condition output means for providing to an image processing apparatus that processes the radiographic image.