JPS6359934A - Stereoscopic fluoroscopic imaging apparatus - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention makes it possible to recognize an X-ray image of a subject three-dimensionally, and also provides a function for photographing the subject image. Regarding photography equipment.

(Prior art) When making a diagnosis using X-rays, the subject is irradiated with X-rays and the transmitted X-rays are converted into visible light using an X-ray fluorescence intensifier (hereinafter abbreviated as 1.I). 1. A transparent mode for photographing this with a TV camera and displaying it on a TV monitor; X-ray images are obtained through photographing modes such as T, I indirect photography in which the output image of I is captured with a film camera, and direct photography in which the film is directly exposed to transmitted X-rays. Since these images are images of a three-dimensional object projected onto a two-dimensional surface, depth information about organs is lost.

Attempts have been made to provide stereoscopic viewing of the subject, and an example of this is shown in FIG.

In the figure, X-ray tubes 1 and 1. While rotating the I system 2 around the body axis of the subject 3, four images are taken into the system controller memory 4 at equal angles. Next, read each image and create four throwing sword type CRs.
Display with high brightness on 5A to 5D (), light diffusing plate 6A on 2
Lenticular plate 6B. The image is projected onto a double lenticule plate 6 laminated with 6C. If you observe this from an appropriate distance and make sure that two adjacent images out of the four are reflected separately in the left eye, you will be able to observe the subject three-dimensionally due to binocular parallax. It's a monkey.

If only one layer of this is left on the film, attach a cassette with the film tightly attached to the lenticular root instead of the double lenticular plate 6 and perform exposure. to shoot film. When observing this, similarly wrench into the film.''
By placing the color plates close together and viewing from an appropriate distance, stereoscopic vision can be achieved using the same principle as described above.

By the way, in stereoscopic viewing, rather than observing from a fixed angle, 3D images are obtained from an angle of W one after another in succession. It is easier to sense the stereoscopic effect and see stereoscopically.

To this end, in the conventional example shown in FIG.

However, since the positions where stereoscopic vision can be viewed are discontinuous, it is difficult to appropriately shift the eye position one after another, and this places a heavy burden on the observer.As a result, the stereoscopic images obtained from different angles are difficult. It is nearly impossible to observe continuously.

Generally speaking, in order to enhance the continuous observation described above, it is necessary to increase the number of images captured at different angles and to increase the number of 3D images, but in the conventional example, it is necessary to increase the number of CRTs (print). This inevitably increases the size of the device.

Furthermore, since it is necessary to take a CRT image through a lenticular plate and observe it through the lenticular plate, the image quality is poor, such as poor resolution and interference caused by the lenticular.

(Problems to be Solved by the Invention) The device shown in FIG. Since the available angles were not known in advance, it was necessary to take several shots at appropriate angles and use only the film suitable for stereoscopic vision. Therefore, the radiation dose to the patient increases and is wasted!
Since a shadow was required, it was not possible to save film, and the diagnostic efficiency was extremely poor since it was necessary to take a picture and sort the film to see if it was valid.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a stereoscopic fluoroscopic imaging device that can reduce radiation exposure and significantly reduce waste of film when photographing film at an angle where stereoscopic vision can be effectively achieved. Our goal is to provide the following. A further object of the present invention is to provide a stereoscopic fluoroscopic imaging device that allows stereoscopic images obtained from different angles to be observed one after another and that can improve the image quality of film images.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a perspective mode for stereoscopic viewing on a TV monitor;
In a stereoscopic fluoroscopic photographing apparatus that selects a photographing mode in which an R shadow camera performs a film R shadow, an angle detection unit detects a relative rotation angle of an X-ray tube and an X-ray image-optical image conversion means with respect to a subject v1. , an angle storage section that stores each collection angle m of a plurality of images collected during the fluoroscopy mode by an input L from the angle detection section; and an operation input 16 for inputting a desired imaging angle 1σ from among the collection angles. The configuration includes an input section and a control section that controls execution of photographing by the ML shadow camera when the angle detected by the angle detection section and the photographing angle match () in the photographing mode. There is.

(Function) When collecting multiple images from the angle of the subject in perspective mode, the angle detection section simultaneously detects the collection angle,
This is stored in the angle storage section. The operator performs stereoscopic observation on the TV monitor, and manually selects the optimal angle for shooting from among multiple stereoscopic images via the input section 5. The subsequent shooting mode C' is sequentially detected by the angle detection section. The control unit controls the operation in the photographing mode so that the input angle is compared with the input photographing angle, and when the two match, photographing is automatically performed.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention.

43 in the same figure, the apparatus of this embodiment is composed of four main parts according to the user. That is, the X-ray fluoroscopic enemy shadow area 10. It is comprised of stereo units 1 to 1B, an operating section 22, and a stereo monitor 25.

The X-ray photographing unit 10 includes an X-ray tube 14 that is rotatably arranged facing the subject. 1.1 (image intensity 7/ear) as an X-ray image-optical image conversion means, a relative angle detection unit 1G that detects the relative angle between the two subjects, and the Vf subject placed thereon. The X-ray tube 14 and I are placed around the bed 13. (2) A bed control unit 17 that drives and controls the X-ray high voltage device 15 that supplies high voltage to the X-ray tube 14; A 11゛v camera 11 that converts the output image of I into a video signal, and the above-mentioned ? , and an indirect camera 12 that imprints the I output image on film. Note that this X-ray fluoroscopy enemy shadow section 10 can be switched between a normal mode in which stereoscopic vision is not performed and a slurreo mode using a switch (not shown).

The i-equipped stereo component 18 includes a CPLJ 20 as a control unit that controls the apparatus of this embodiment, including an I10 interface, and an A/D on the input side.

It is comprised of a video storage section 21 that includes a D/A on the output side and stores video signals at each rotation angle, and an angle storage section 19 that stores the angle at which the video signal is captured.

The operation unit 22 includes an output memory changeover switch 24 that selects two adjacent video signals from a large number of stored video signals and automatically switches between the two adjacent video signals in sequence, and an output memory changeover switch 24 that monitors the stereo monitor 15 and selects a video signal suitable for stereo shadows. It is composed of a photographing positioning switch 23 as an input section for selecting the R shadow angle.

The stereo monitor 25 is, for example, for left image, 'LiLiO2
For example, a to 11 monitors not shown in FIG.
If a total of 8 images are captured at equal angles,
As shown in FIG. 3, the display order is such that, for example, the left image is the image captured before the stone image, and the display is switched one after another while maintaining the relationship.

Next, the operation of the device of the above embodiment will be explained.

First, while observing with normal fluoroscopy, the X-ray tube 14°1, I is rotated and set to the position where stereo capture starts.

After that, switch to the listere soup mode using the changeover switch described in section 3 and 14. I.

X-rays are irradiated while rotating (2) to each position a to [ ] shown in FIG. And 1. A video signal for each specified angle is captured through I and stored in the video storage section 21. At the same time, the captured angle is detected by the relative angle detection section 16 and is stored in the angle memory via CI 20. It is stored in section 19.

When the specified number of sheets have been taken in, the CPU 20 sends the rotation speed 1 to 1. I stops at position [1] shown in FIG.

After this, while operating the output memory selector switch 24,
As shown in Figure 3, 7J: f! i! , shift the stone statue one by one, and view the three-dimensional image from the eyepiece of the stereo monitor 25! As soon as I realized that, I started the above-mentioned stereoscopic indirect photography operation.

Below, the operation of the three-dimensional indirect R shadow is shown in the flow diagram V- shown in Fig. 4.
Explain according to the following.

In step 1 (corresponding to ST1 in the figure, hereinafter similarly abbreviated as ST), as described above, a stereoscopic image is observed from the eyepiece of the stereo monitor 25 to search for a photographing position.

In step 2, as a result of the search in step 1, the photographing positioning switch corresponding to the stereoscopic image desired to be photographed is selected.

After the above operations are completed, the following operations are executed under the control of the CPU 20.

First, the CPU 20 reads from the angle storage unit 19 the angle information selected by the photographing positioning switch 23 and at which the currently observed stereoscopic image is captured (step 3);
, After this, when the operator operates the X-ray exposure switch,
A RE A DY signal is input from the line high voltage device 15 to the CPU 20 (step/1). And CPU20
The X-ray tube 14 and 1. A signal indicating rotational movement of (2) is output to the bed control section 17 (step 5).

Then, the X-ray tube 14 and 1. I is rotated around the subject (step 6).

During this rotational drive, the CPIJ 20 stores the angle information read from the angle storage section 19 and the relative angle detection section 16.
(Step 7)
. Then, when the peak angles match, the CPIJ 20 outputs a dance trigger signal to the X-ray high voltage device 15 (step 8). With this imaging trigger, X-rays are emitted from the X-ray tube 14 toward the subject, and 1. The output image of I is photographed by the indirect camera 12 (step 9). Then, when one photograph is completed, the indirect camera 12 prepares for the next photograph (step 10).

The operations from step 7 to step 10 described above are performed for the positions preselected by the photographing positioning switch 23, and indirect photographing is performed at each position (step 11).
). When all the photographs are taken at the positions preselected by the photographing positioning switch 23 (No. 111), the CPU 20
sends a rotation step signal to the bed control unit 17 to stop the rotation, and all operations for indirect photography are completed (step 12).

In addition to this, this embodiment
Since imaging is performed only at the imaging angle set during the dormitory, it is possible to reduce the exposure dose and save the number of imaging films.

In addition, in this embodiment, a plurality of images are stored in the image storage section 21, and the left image and the third image are stored while maintaining the display order of the left image.
As shown in the figure, the video is sequentially shifted and stored in the video storage unit 2.
1, it is possible to continuously observe three-dimensional images obtained from different angles one after another. Zarani, 1. Since the I-indirect camera 12 is used, the image quality of the film image is also improved.

Note that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention.

For example, three-dimensional observation methods on the stereo monitor 25 include a method in which two stone statues are displayed on two television monitors at the same time, a method in which they are displayed on a single television monitor in a time-sharing manner, and glasses shutters are opened and closed; Alternatively, a lenticular one type may be used.

In the case of this lenticular one-way type, the left,
If the right image is shifted and displayed in accordance with FIG. 3, continuous ˜γ body viewing becomes possible without requiring multiple monitors.

Also, the shooting camera is 1. Not only the I-indirect camera 12 but also a direct camera that directly captures an X-ray image can have the same effect. Furthermore, the X-ray tube 14 may be configured as a stereo X-ray tube having two focal points.

In this case, since the two left-hand statues can be collected at - locations, the rotation operation can be performed quickly.

[Effects of the Invention] As explained above, according to the present invention, it is possible to reduce the exposure dose and reduce the number of films when applying the film R shadow at an angle where stereoscopic vision can be effectively achieved. A good stereoscopic fluoroscopic imaging device can be provided.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an apparatus according to an embodiment of the present invention, Fig. 2 is a schematic diagram showing a collection operation for stereoscopic perspective, and Fig. 3 is a schematic diagram showing an example of switching display of two left-hand images. An explanatory diagram, FIG. 4 shows the operating procedure in the traveling image mode) [1-Diagram, FIG. 11...-FV camera, 12... Photographing camera, 14
... X-ray tube, 16... Angle detection section, 19... Angle storage section, 20... Control section, 21... Image storage section, 2
3... Input unit, 25... TV monitor, 1, I... X-ray image-optical image conversion means.

Claims (3)

[Claims] (1) X-ray tube and X that are rotated relatively around the subject
A line image-optical image conversion means, a TV camera that converts an optical image obtained at each predetermined rotation angle into a video signal and outputs it, a video storage unit that stores this video signal, and a video storage unit that outputs the video signal. A TV monitor that enables stereoscopic viewing by displaying images collected at adjacent angles based on video signals as a left image and a right image, and a camera that captures an X-ray transmission image of the subject or its optical image on film. In the stereoscopic fluoroscopic photographing apparatus, the X-ray tube and the an angle detection section that detects a relative rotation angle of the optical image conversion means with respect to the subject; an angle storage section that inputs and stores each collection angle of a plurality of images collected during the perspective mode from the angle detection section; an input section for operating and inputting a desired photographing angle from among the collection angles; and an input section for operating and inputting a desired photographing angle from among the collection angles, and executing photographing with the photographing camera when the angle detected by the angle detection section matches the photographing angle in a photographing mode. 1. A stereoscopic fluoroscopic imaging device, characterized in that it is provided with a control section for controlling. (2) The control unit executes the imaging mode by rotationally driving the X-ray tube and the X-ray image-optical image conversion means in a direction opposite to the rotation direction in the fluoroscopy mode. Stereoscopic fluoroscopy device. (3) The control unit reads and controls images from the image storage unit to enable continuous stereoscopic viewing from different angles while maintaining the display order of the left image and right image. 3. The stereoscopic fluoroscopic imaging device according to item 1 or 2.