JPS6359935A - 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]

[Object of the Invention] (Industrial Application Field) The present invention relates to a stereoscopic fluoroscopic recording device that makes an X-ray image of an object three-dimensionally recognizable and records this stereoscopic image in a reproducible manner. Ru. (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 perspective mode in which this image is projected by a TV camera and displayed on a monitor; 1. An X-ray image is obtained by copying the image of the protruding horn of I with a single-noise camera. . These images are three-dimensional objects projected onto a two-dimensional surface, so
Depth information of organs was lost. Therefore, attempts have been made to provide stereoscopic viewing of the subject, and an example of this is shown in Figure 7.
and 1. While rotating the I system 2 around the body axis of the subject 3, the system controller
It is designed to be imported into RAM memory 4. Next, each image is read out and displayed at high brightness on four projection type CRTs 5A to 5D, and the light diffusing plate 6A is pasted with two lenticular plates 6B and 6G: L-double lenticular temporary 6.
Project to 10. If you observe this from an appropriate distance (), and make sure that two adjacent images out of the four images are captured separately on the left and right 11, you can observe the subject three-dimensionally due to binocular parallax. If there are any remaining scratches on the film, use a cassette with the film in close contact with the lenticular plate instead of the dasol lenticular plate 6 to expose it with the device () and perform a one-noil decoy image.When observing this, Similarly, if a lenticular plate is closely attached to the film and viewed from an appropriate distance, stereoscopic vision can be achieved using the same principle as described above.By the way, stereoscopic vision is obtained by viewing from different angles rather than observing from a fixed angle. It is better to observe three-dimensional images one after another in succession, which gives a better sense of three-dimensionality and facilitates stereoscopic viewing.To this end, in the conventional example shown in FIG. However, since the positions where stereoscopic viewing can be viewed are discontinuous, it is difficult to appropriately shift the eye positions one after another, and the burden placed on the residents of the vA dormitory is also low.

As a result, it is nearly impossible to continuously observe stereoscopic images obtained from different angles. Furthermore, in order to enhance the continuous observation mentioned above, it is necessary to increase the number of images captured at different angles.) Is it necessary to increase the number of 1-C 3D images?
must be increased, resulting in an increase in the size of the device. Furthermore, even in the field of view, the CRT image was photographed through a lenticular plate, and it was necessary to observe the image through the lenticular plate, so the resolution was good, but the image quality was poor, such as interference caused by the lenticular. (Problems to be Solved by the Invention) The device shown in FIG. When recording a desired 3D image for observation with the rear eye, the user had to rely on film photography to record this image, which was a complicated operation, and Similarly, reproducing the three-dimensional image at a later date is time-consuming. That is, according to the example shown in Fig. 7, for film photography, it is necessary to set up the cassette 1~ in which the film is tightly attached to the lenticular plate, and to photograph the pair of left and stone statues that constitute the desired three-dimensional image. It won't happen. When observing this, it is necessary to place a wrench plate in close contact with the film. In addition, the above-mentioned direct rhyme and shadow, 1. Even in the case of indirect photography, it is simple in that it does not require a lenticular plate, but it is similar in that it requires replacing the cassette for each left image and stone image. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a stereoscopic fluoroscopic recording device that can record a 3D image observed in a fluoroscopic mode with a simple operation so that it can be easily reproduced at a later date. [Structure of the Invention] (Means for Solving the Problems) The present invention provides an X-ray tube and an X-ray image-to-optical image conversion means that are rotated relatively around a subject, and A TV camera that converts an optical image into a video signal and outputs it, a video storage unit that stores this video signal,
A VTR for recording video signals of the images of the group of images stored in the video storage section on a video tape, and a control section for controlling recording of the video signals of the group of images stored in the video storage section on the VTR. It constitutes a stereoscopic fluoroscopic recording device. (Function) A plurality of images are collected from different angles of the subject in perspective mode, and these are stored in the image storage unit. When performing three-dimensional observation, two images collected at adjacent angles out of multiple images are displayed on a TV monitor as a stone image and a left image, making it possible to perform three-dimensional recognition using the afterimage phenomenon. becomes. On the other hand, video recording is performed by reading out the video stored in the video storage section mentioned above under the control of the control section τ\/
1-R to perform recording operation. Therefore, the conventional fill 1X
Compared to recording using fi1 shadows, it is not necessary to operate the cassette device for each pattern, making the operation simpler. Furthermore, since it is not necessary to expose the X-rays Q4 during recording, the exposure dose can be reduced. (Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 3. Fig. 1 is a one-step diagram of an apparatus according to an embodiment of the present invention. . In the same figure, numeral 13 indicates that the apparatus of this embodiment is composed of five main parts for each person.
．． Sudereon roller 18. It consists of a stereo monitor 2G, a video player (VTR) 27, and an operation section 25. The X-ray fluoroscopy R-shading section 10 is arranged around the subject (X-ray tubes 14, which are rotatably arranged opposite to each other). 12
a relative angle detection unit 16 that detects the relative angle between the two subjects, and a bed 13 on which the subject 1)' is placed;
A bed control unit 17 that drives and controls the X-ray tubes 14 and 1.112 around this bed 13, an 1.7
a TV camera 11 that converts the output image of the

[It is composed of 'C. The X-ray fluoroscopy ML type section 10 can be switched between a normal mode in which stereoscopic viewing is not performed and a stereo mode using a switch (not shown). The stereo controller 18 includes a CPU 20 that includes an I10 interface and controls the device of this embodiment;
A video storage unit 21 that stores video signals at each rotation angle, including A/D on the input side and D/Δ on the output side; and an angle storage unit 19 that stores the angle at which the video signal was captured. Said\/
Record to RT27. VTR video output unit 22 for controlling playback; group image identification signal input/output unit 23;
[1] and a loop section 24. The operation unit 25 includes an output memory changeover switch that selects two adjacent images of a large number of stored video signals and automatically switches between the two adjacent images sequentially, and an ML image suitable for stereo copying by observing the stereo monitor 26. The stereo monitor 26 is composed of an input section for selecting the square shape, a switch for positioning the dance shape shadow, etc. The stereo monitor 26 is composed of two monitors, for example, one for the left image and one for the stone image. If a total of 8 images up to Anoimo 11 shown in Figure 1 are captured at equal angles, the third
As shown in the figure, the display order is changed one after another while maintaining the relationship that, for example, the left image is the image captured before the stone statue. The V''r R27 records X-ray images at each position a through the fluoroscopic mode, and is stored in the image storage section 21 under the control of the CPU 20 and the VTR control section 24. The X-ray image that has been
The R video output unit 22 is used to manually input the video data and record it on the video track. In addition, when X-ray images of the same object from each device a to a group of images are set as a group of images, this group identification signal 3eg and the image identification signal a to [1 in the group This is input via the VTR 27 and recorded on the audio track of the VTR 27. In this sense, the CPU 20. The VTR video person output unit 221, the group image identification signal person output unit 23, and the VTR unit 24 constitute a control unit that controls recording of the VTR. - Image recorded on R27 and its identification signal 3
A conceptual diagram of the recording pattern with eg, ano 1) is shown in FIG. In the same figure, there are 8 images for each of the l, N, and O liver groups, Mξ to Mh, Na to Nh, Qa to O
1, where h is recorded, the X near corresponding to the first position of each group: r-h
The image identification signals ε] to 1) are recorded on the audio track corresponding to the image recording position in each group. Next, the operation of the apparatus of the above embodiment will be explained. First, while observing with normal fluoroscopy (), the X-ray gamma beam was 14°1.
112 and set it to the position where stereo A capture starts. Thereafter, the mode is switched to the Sagereo mode using the above-mentioned changeover switch, and X-rays are emitted while rotating the X-ray tube 14°1.112 to each position from a to a shown in FIG. Then, video signals at each specified angle are captured via the TV camera 11 and stored in the video storage section 21.
At the same time, the capture angle is stored in the relative angle detection section 16.
is detected and stored in the angle storage section 19 via the CPU 20. When the specified number of sheets has been taken in, the CPU 20 sends a Get rotation step signal to the bed control section 17, and the X-ray tube 1
4 and 1.112 stop at the position shown in FIG. After this, while operating the operation unit 25, shift the two left stone images one by one as shown in FIG. Recognition becomes possible. Next, each operation when recording images at each of the ten positions a to 10 on the VTR 27 and when playing back from the VTR 27 is as follows.
The explanation will be given with reference to the flowcharts shown in FIGS. 5 and 6. FIG. 5 is a flowchart showing the recording operation procedure for the VTR 27. As shown in the figure, in step 1 (corresponding to ST1 in the figure. The same applies hereinafter), V -
Manually issue the recording command for T”R. Then, the CP
First, the U20 controls the group identification signal human output unit 23 to output the group identification signal Seg (step 2).As shown in FIG. The audio is recorded in audio 1 to rack-1x corresponding to the head position of the liver (step 3). After this, CP
A plurality of images, e.g.
2 (step 4). At the same time, CPU20
is the image identification signal anoimo-1 from the group image identification signal human output unit 23
18 output (step 5). As a result, VTR
On the tape, each video signal is recorded on a video track, and the corresponding image identification signals a through are recorded on an audio track (
Step 6). Then, when all the images stored in the video storage section 21 are recorded on the VTR 27, CP LJ 2
0 outputs a stop signal via the VTR control unit 2/l, and the series of recording operations ends (step 7). By performing each of the above recording operations for each group,
As shown in FIG. 4, recording operations regarding multiple groups can be performed. Next, regarding the playback operation from the VTR 27, see line 7 in Figure 6.
The explanation will be given with reference to the boot.
From R27, first, the group identification signal Seq is input to the CPU 20 via the group image identification (igQ input/output unit 23) (step 2).As a result, the CPU 20 puts the video storage unit 21 into a standby state (step 3).On the other hand, The video signals in the group corresponding to the group identification Seg are sequentially input from the \/TR 27 to the VTR video input/output unit 23 (step 4).
At the same time, image identification signals a to group identification signals corresponding to each video signal are input to the CPU 20 via the group image identification signal input/output section 23 (step 5). Then, C-13=PLJ 20 stores the video signal when the image identification signal is input manually in a predetermined memory of the video storage section 21 (step 6). For example, based on the image identification signal a, the first image Na of the group
18 and subsequent images are stored in the memory 1 and the next image Nb is stored in the memory 2 based on the image identification signal S. Similarly, each of the eight images is stored in the corresponding memory. and,
When all the images in the group are stored in a predetermined memory in the video storage section 21, the CPU 20 outputs a stop signal via the VTR controller section 24, and ends reading out the images (step 7). The second is the playback operation from the VTR 27, and after the image is stored in the video storage section 21, the readout is controlled in the same way as in the perspective mode described above (see Figure 3 for details), and the image is read out based on the VTR recorded image. Three-dimensional recognition of the subject becomes possible. In this way, according to the present embodiment, a group of images obtained in the perspective mode and stored in the image storage section 21 is recorded on the VTR 27, so that a single image can be recorded like a conventional film. The recording operation can be performed without the need for complicated operations such as changing the cassette every time a photograph is taken on the same film. Furthermore, since it is not necessary to irradiate X-rays during recording, the amount of radiation exposure can be significantly reduced. Furthermore, since video is automatically transferred by the CPU 20, it is possible to reduce tape consumption. Furthermore, V
T RL & generally does not have an at 1/s function, but each i
Since the group and image identification signals that distinguish each image of Y and the city are also recorded at the same time, during playback, it is possible to automatically detect the beginning of a group in which many images are continuously recorded, and also to distinguish between each image. Images can also be distinguished and stored in the image storage unit. Therefore, during reproduction, three-dimensional images from different angles can be displayed continuously in the same way as during fluoroscopy, and three-dimensional recognition can be more easily understood. 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, the stereoscopic observation f method on the monitor 26 can be used to simultaneously display the left image and the A1 image on two monitors, or to display them on a single TV monitor in a time-sharing manner. An item that opens and closes glasses, ivy, or a wrench. In the case of this one-sided system, if you display the two left stone statues on two C[shi1-] as shown in Figure 3, you will need a large number of monitors! Continuous stereoscopic viewing becomes possible. Furthermore, the X-ray tube 14 may be constructed as a Sundero X-ray tube having two focal points. In this case, since the left image and the 6 images 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 store several images obtained in the perspective mode in the video storage section (J) and to record the images in this video storage section on a VTR. Therefore, the recording operation is simpler than conventional film copying, and since no X-ray radiation is required during recording, the exposure dose can also be reduced.

[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 explanatory diagram showing a collecting operation for stereoscopic perspective, and Fig. 3 shows an example of switching display of one left image and one stone image. Schematic diagram,
FIG. 4 is a schematic explanatory diagram schematically showing a recording pattern on a videotape, and FIG. FIG. 6 shows the operating procedures during recording and playback, respectively), and FIG. 7 is a schematic explanatory diagram of the conventional apparatus. DESCRIPTION OF SYMBOLS 11... TV camera, 12... X-ray image-optical image conversion means, 14... X-ray tube, 20.22, 23.24... Control section, 21... Image storage section, 26...TV monitor, 27 ・VTR.

Claims (2)

[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, VTR that records video signals of a group of images on videotape
and a control section that controls recording of video signals of the group of images stored in the video storage section on the VTR. (2) The control unit controls the recording of video signals of a group of images on the video track of the videotape, and records the group identification signal on the audio track corresponding to the beginning of the image recording position of the group. 2. The stereoscopic perspective recording apparatus according to claim 1, wherein image identification signals are controlled to be recorded on audio tracks corresponding to each image recording position.