JPS61159941A - Continuous rotary three-dimensional image observation apparatus - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention is used in the field of X-ray television equipment. The present invention relates to a continuously rotating three-dimensional image observation apparatus comprising these stereo control devices and using a three-dimensional observation mirror if necessary.

(b) The conventional continuous rotation stereoscopic image observation device consists of an image intensifier (I,
Construct an X-ray scanner using I) and its construction.

Attach a cine camera or It consists of a device that performs X-ray radiation and photographs the X-ray image, and a group of three-dimensional image re-maintaining devices that obtain a three-dimensional image from the photographed cine film or the video disk recorder that records the image.

The present invention preferably relates to a stereoscopic image reproduction device using a video disc recorder. Conventionally, a cine projector (a stereoscopic observation device using a stereoscopic observation device) is known.Compared to this, when a video disk recorder is used, the time from the end of X-ray photography to the observation of a three-dimensional image is significantly reduced. It became possible to treat the image as electrical signal data, and image processing was also possible by adding equipment. However, the resolution and image quality of the image on the X1ii TV monitor is lower than that of a cine image.Especially, In the still image, the defects are microscopic.

(c) Purpose The purpose of the present invention is to enable continuous stereoscopic viewing of images from any direction in the same way as still images, and to improve the resolution and quality of images by continuous projection, and to provide a video recording and playback device. The forward and backward relationship of the 3D image can be maintained constant in both forward and reverse directions, and it is also possible to switch the front and back.
It is an object of the present invention to provide a continuous rotation stereoscopic image observation device that has the same effect as stereoscopic viewing even when there is only one V monitor, and has a microscopic synergistic effect when a stereoscopic image observation mirror is used.

(d) Configuration The above purpose is to provide a video recording and reproducing device for continuous X-ray images obtained from an X-ray scanner that rotates around the subject, two IC storage devices, two TV monitors, and It is equipped with a stereo control device for controlling the video recording and playback device, and is equipped with a circuit that counts the synchronization signals output from the video recording and playback device and switches the video playback between normal and reverse rotation when a predetermined count setting value is reached. This is achieved by: In this case, a switching circuit is added that uses a reverse signal as a control lp signal to reverse the images of the two IC storage devices and display them on their respective TV monitors when the video playback operation is switched in reverse. Preferably, another switch is provided to change the context of the image.

In other words, when reproducing a continuously rotated X-ray image, it is possible to continuously repeat forward and reverse rotations at any desired rotation angle range around the desired angle of the image, and the playback of the video recording and reproducing device can be performed in the normal direction. Keeps the front and back of the stereoscopic image constant regardless of whether it is reversed,
The switch allows you to change the front and back of the image, allowing you to observe the X-ray image three-dimensionally until you are satisfied.

(E) Embodiment Next, a preferred embodiment of the present invention will be described based on the drawings.

FIG. 1 is an overall schematic block diagram showing one embodiment thereof. In this figure, 1 is an X-ray high voltage device, 2 is an
A wire tube device, 3 is a subject, 4 is a gantry, 5 is 1. I, 6
is X! iTV camera, 7 is a TV camera controller, 8 is a video disc recorder, 9 is a stereo controller, 10 is an IC
Storage device 11 is an IC storage device 112 is an X-ray 'rv
The monitor a113 is an XfIITV monitor b, and 14 is a stereoscopic image observation mirror. The data in the IC storage device alO is X&t
The X-ray image is sent to the TV monitor a12 and displayed. Also I
The data in the C storage device bll is displayed as an image on the X-ray TV monitor 13.

FIG. 2 is a block diagram of the forward/reverse rotation signal generation system of the video recording and reproducing apparatus 8 according to the present invention, and FIG. 3 shows the image data of the IC storage device 10, 11 at the time of the reverse rotation.
FIG. 3 is a circuit block diagram for transferring data to a TV monitor 12, 13 by arranging each other. These circuits are built into the stereo controller 9.

In Figures 2 and 3, 15.16.17 and 18
is an interface, 19 is a counter, 20 is a programmable counter, 21 is a digital switch, 22 is a flip-flop, 23 and 25 are inverters, 24 is a 3D image front/back switching switch, 26 is a multiplexer, 27 is a count pulse input terminal, 28 is a Forward rotation signal output terminal, 2
9 is a reverse rotation signal output terminal, 30 is a reverse rotation signal input terminal, 31
and 32 are video signal input terminals, 33 and 34 are video signal output terminals, 35 is a set switch, and 36 is a phase delay circuit.

The X-ray tubes N2, I, and I5 are attached to a gantry 4 facing each other, and at the same time as the gantry 4 rotates at a set rotation speed, the X-ray height is adjusted in synchronization with a synchronization signal from the stereo controller 9. A high voltage is applied from the voltage generator 1 to the xl tube device 2, and X-rays are emitted. I,
The output image of I5 is converted into a video signal by a TV camera 6, and then passed through a TV left camera controller 7 and recorded by a video recorder 8. When recording is finished, return the head to the recording start position. The stereo controller 9 causes the video recorder 8 to start playback, and as soon as images at intervals of 5 degrees, for example, are stored in the IC storage device 10 according to the write signal from the stereo controller 9, the data is transferred to another one. The data is sent to the IC storage device 11. These video data pass through the switching circuit of the stereo controller 9 (Fig. 3) and are sent to T.
Output to V monitor 12.13. TV monitor 12.
When the images reflected on the two cameras 13 are observed with the stereoscopic image observation mirror 14, a stereoscopic view can be obtained.

A count pulse output from the video recorder 8 every time a frame changes is input to the pulse input terminal 27, and after being counted down by the counter 19, the pulse input terminal 27 has a setting value of the digital switch 21 for setting the rotation angle width. The pulse is input to the programmable counter 20, and when the set value is reached, a pulse is output to the flip-flop 22.

When the flip-flop 22 receives a pulse, it sends forward and reverse rotation signals to the video recorder 8 via the interface 17 and output terminal 28, and the interface 2 and output terminal 29, respectively.
Output to.

The video signal output from the video recorder 8 has the order of frames switched between normal rotation and reverse rotation as shown in FIG. If you send it to .13, the context of the projected 3D image will also be changed.

Therefore, it is necessary to switch between the video signals output to the two X-ray TV monitors when the reproduction operation is in the forward direction and in the reverse direction. An example circuit for this purpose is shown in FIG.

A reverse signal is input from the video recorder 8 to the terminal 30, the phase is delayed by one frame by the phase delay circuit 36, and one is sent to the control bin of the multiplexer 26 on the a side through the switch 24, and the other is sent to the control bin of the multiplexer 26 on the a side. b via inverter 25
It is input to the control pin of the multiplexer 26 on the side. As a result, when the reproduction is reversed, the IC storage device 10
．． 11 frame images are exchanged with each other and displayed on TV monitor 1.
Sent to 2.13. Note that 24 is a switch for switching the front and rear of the stereoscopic image.

FIG. 4 is an output frame image (a) of the video recorder 8)
Based on , the output image of the IC storage device 10 at that time (b)
), output image (C) of IC storage device 11), TV monitor 1
2 input image (d)') and TV monitor input image 13 (e
)) are shown respectively.

Note that the 7-picture video playback device is not limited to a video disc recorder, but may be any device that can play back images continuously in either forward or reverse rotation, such as a laser disc.

(F) Effects The present invention provides the following effects by repeatedly rotating a continuously rotating X-ray image between normal and reverse rotations at an arbitrary rotation angle width around the desired stratum corneum and enabling stereoscopic viewing.

(a) Both resolution and image quality are improved compared to still images.

(b) Compared to stereoscopic viewing of still images, the use of a stereoscopic image observation mirror provides more effective stereoscopic viewing.

(C) If there is no 3D image observation mirror or only 1 TV monitor
Information close to stereoscopic vision can be obtained even with a stand (d) Also,
By changing the switch, it is possible to change the front and back of the stereoscopic image, so by selecting the part with a large magnification to be in the front and the part with a small magnification to be in the back, natural stereoscopic viewing is possible.

(e) Since images can be continuously output in forward and reverse directions, observation can be continued until the user is satisfied.

[Brief explanation of drawings]

FIG. 1 is an overall block diagram showing one embodiment of the present invention, FIG. 2 is a forward/reverse signal generation block diagram according to the present invention, FIG. 3 is a block diagram of a frame image front/back switching circuit according to the present invention, and FIG. 4 FIG. 2 is a detailed explanatory diagram of the present invention. 8 is a video recording/playback device, 9 is a stereo controller, 10 and 11 are IC storage devices, 12 and 13 are TV monitors, 19, 20, and 21 are programmable counters, 22 is a flip-flop, 23 and 25 are inverters, 26 is a multiplexer.

Claims (3)

[Claims] (1) A video recording and playback device for continuous X-ray images obtained from an X-ray scanner that rotates around the subject, two IC storage devices, two TV monitors, and a stereo control device that controls them. It is characterized by adding a circuit that counts the synchronization signals output from the video recording/playback device and switches the video playback between normal and reverse rotation when a predetermined count setting value is reached. Continuously rotating 3D image observation device. (2) At the time of reverse switching of video playback operation, a switching circuit is added that uses a reverse signal as a control signal so that the images in the two IC storage devices are reversed and displayed on their respective TV monitors. A continuously rotating three-dimensional image observation device according to claim 1, characterized in that: (3) The continuously rotating three-dimensional image observation device according to claim 2, characterized in that a switch for inverting the control signal is inserted.