JPS61118999A - X-ray picture diagnosis device - Google Patents

Abstract

PURPOSE:To carry out concurrently taking the spot picture and the TV image of a specified region in a body to be diagnosed and enable the dynamic analysis by controlling a spot shooting device and a TV camera via a timing controller, synchronized with X-ray radiation. CONSTITUTION:A timing controller 1 impresses a control signal instructing film feed and a shutter release to a spot camera 11 for which an X-ray control ler 3 is fed with an X-ray demand signal S3, a synchronous control signal S2 showing the start of an X-ray TV system frame or each of its fields to an X-ray TV camera 6 and a spot shooting indication signal S1 as a mode selective signal. And cameras 6 and 11 receive, via attenuators 20 and 21, an X-ray picture as converted into light image and a TV image of high color density resolution and a spot film shooting of high space resolution concurrently take place for the specified region, so that its good dynamic analysis can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an X-ray image diagnostic apparatus capable of simultaneously performing spot imaging and television imaging.

[Technical background of the invention and its problems] Cardiac angiography images obtained by X-rays transmitted through a subject using an X-ray cineangiography device for testing cardiac function are continuously photographed on cine film using a cine camera. , after developing this, the image is played back and displayed as a movie to observe the form and movement of a predetermined part within the subject, and if necessary, various feature quantities for regularly analyzing cardiac function. A method of manually measuring and analyzing this has been widely adopted.

However, observing the image after developing the film,
The problem is that it takes a lot of time and effort to obtain analysis results because of the need for manual measurements.

Therefore, in order to solve the above problem, conventionally,
By combining an X-ray television imaging device and an X-ray cine angiography device, and using the X-ray television signal simultaneously output from the television imaging system installed for monitoring during cine imaging, this X-ray contrast image is converted into an X-ray television signal. digitize the agent,
A method has been proposed in which the above-mentioned digital signals are inputted to an image processing apparatus consisting of one electronic computer system to perform image processing.

In this case, in order to reduce the amount of X1lll for the subject and to increase the X-ray tube capacity, the Xa cine angiography system generates X-rays intermittently in synchronization with the frame advance of the cine camera when photographing on cine film. I'm doing a video transfer. To explain more specifically, during cine shooting, the frame-advance motor of the cine camera rotates at a predetermined speed, and the cine shutter and frame-advance mechanism, which are mechanically connected to the rotating shaft, operate to take pictures. By outputting a signal indicating that the cine shutter is open, the X-ray generation system generates pulsed X-rays in conjunction with this signal. Furthermore, since the beam scanning of the X-ray television camera and the rotation of the cine camera motor are not synchronized, the image obtained as the output of the X-ray television signal is an image corresponding to the frame imaged on the cine film. do not have.

On the other hand, digital radiography equipment can simultaneously control the X-ray generation system and the X-ray television system and input images continuously, making it suitable for cardiac function dynamics analysis such as cardiac volume measurement. can be said to be the most suitable image diagnostic device,
Another feature of this device is that the image output from the television camera has a high density resolution.

However, the spatial resolution of images that can be output by the digital radiography apparatus is currently inferior to that of film, and is insufficient for the examination of coronary arteries, which is the most important part of cineangiography. Therefore, in order to conduct a diagnostically sufficient test using the conventional apparatus, it is necessary to perform cine photography and television photography separately twice. In this case, the contrast medium must be injected into the subject twice, and the subject is exposed to X-rays twice, which increases the invasiveness of the X-rays to the subject. Moreover, if images are taken separately, the images obtained are images taken at different times, and there is a problem in that it is difficult to associate these images and use them for diagnosis.

In addition, an Xl1lvJ image diagnostic apparatus that stores images simultaneously on cine film and a videotape recorder was proposed in Japanese Patent Application No. 119571/1983 (proposed by the applicant).
However, since the dynamics are photographed using an X-ray television and used for analysis, there is no need to double photograph using a cine camera, which is inconvenient for both development and storage. There was also a problem from the point of view that one or two copies would be enough.

[Object of the Invention] This invention was made in view of the above-mentioned circumstances, and is an X-ray dynamic system that simultaneously images a predetermined region within a subject using a spot R imaging device and a television camera, and enables dynamic analysis. The purpose of this invention is to provide an image diagnostic device.

[Summary of the Invention] The summary of the present invention for achieving the above object includes an X-ray tube,
an image conversion device that converts an X-ray image created by X-rays emitted from an X-ray tube and transmitted through a subject into a light image; and a television camera that photographs the light image output from the image conversion device and outputs a television signal. X! ! a television camera device, an image processing device that processes a television signal output from the X-ray television camera device to perform dynamic analysis, and a spot photographing device that photographs a light image output from the image conversion device on a spot film. , the X-ray television camera device and the spot photographing device are operated in synchronization with the X-ray exposure, the television photographing and the spot photographing device are operated, and the simultaneous decoying of the television photographing and the cine photographing is possible. The present invention is characterized in that it includes a timing control section that controls the device.

[Embodiment of the Invention] An embodiment of the invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a timing control section, which outputs a mode select signal S1 instructing execution of spot shooting to the spot camera 11 when performing spot shooting and TV R shadow at the same time. After outputting the mode select signal $1, a television shooting control signal is output to the X-ray television camera 6, and a timing signal S2 indicating the start of each frame or each field of the X-ray television system in the television shooting control signal is output. The spot camera control signal Sho synchronized with the spot camera 11
and further outputs a control signal S8 for controlling the image input interface unit 9, and when not performing spot photography, outputs a mode select signal S1 that instructs the spot camera 11 to prohibit spot photography, and then outputs the timing signal The X-ray request signal S3, which is synchronized with S2, is output to the X-ray 11JIII device 3, thereby controlling the operation timing of each section.

X Ill 1lill The Ill device 3 inputs the xm request signal S3 output from the timing control section 1, and
It is configured to output an X-ray control signal S5 for setting X-ray exposure conditions such as a ray tube current and an X-ray tube voltage, and for executing X-ray exposure control. The high voltage generator 4 receives the X-ray control signal S
5 is input and a high voltage is applied to the X-ray tube 5 according to the X-ray exposure conditions. An image conversion device such as an image intensifier eye (II) is installed opposite the X-ray tube 5.
(not shown) is arranged, and the fluorescent image output from I-1 is sent to the spot camera 11 via the half mirror 12.
and an X-ray television camera 6. Incidentally, between the half mirror 12 and the television camera 6 or the spot camera 11, first and second optical attenuators 20 and 21 for attenuating the amount of light from I-1 are respectively arranged. The brightness of the images output from each spot camera 11 is made equal. Various types of optical attenuators 20 and 21 are conceivable, such as one that uses liquid crystal to attenuate light due to a polarization phenomenon, or one that attenuates light by appropriately selecting a plurality of N-D filters. As shown in FIG. 3, the spot camera 11 includes a phase difference detector 33, a filter 34, a motor drive circuit 35, and an encoder 32 mounted on a rotating shaft, as well as a motor that transports spot films one by one to an exposure area. 31 and inputs the spot camera control signal S+o from the timing control unit 1, the phase detector 33 detects the phase difference between the position signal @S12 and the spot camera control signal S+o simultaneously output from the encoder 32. The detection signal S+3 outputted from the filter 34 is inputted to the motor drive circuit 35, and the drive signal S+s that cancels the phase difference is sent to the motor 31 from the motor drive circuit 35. The configuration is such that the XM television camera 6 can operate, particularly film frame advance and spot camera shutter operation in synchronization with field scanning. By inputting a television photography control signal, the X-ray television camera 6 forms a latent image on the photoconductive surface by blanking the lff1 picture tube during X-ray exposure, and after blanking is released, the photoconductive The television signal S7 is configured to output the television signal S7 by performing interlaced scanning over the screen, and more preferably sequential scanning. The output television signal S7 is output to the television monitor 7 and the image input interface unit 9, and the image is displayed on the television monitor 7. The image input interface section 9 is
The input television signal S7 is digitized according to a control signal S8 output from the timing control section 1, and then output to the image processing device 10. The image processing device 10 is configured to input the digitized image data S9 and perform various image processing such as subtraction and contour extraction as appropriate.

Next, the operation of the above configuration will be explained.

A case will be described in which spot shading and television scanning are performed at the same time, and spot imaging is performed once every three frames of the X-ray television system.

After outputting a mode select signal S1 instructing spot photography and television photography to the spot camera 11, the timing control unit 1 outputs a television photography control signal to the X-ray television camera 6, and at the same time outputs the television photography control signal. A spot camera control signal S10 synchronized with a timing signal S2 indicating the start of each frame of the X-ray television system is output to the spot camera 11.

By inputting the spot camera control signal S+o, the spot camera 11 rotates the motor 31 to transport the spot film to the exposure area, opens and closes the spot shutter, and also controls the X-ray controller 3 when the spot shutter is opened. By outputting an X-ray request signal from the timing control section 1, xm pulses are emitted from the X-ray tube 5 according to predetermined X-ray exposure conditions via the X-ray controller 3 and the high voltage generator 4. be done.

The X-ray television camera 6 inputs a television photographing control signal to output a television signal by blanking the photoconductive surface and beam scanning the photoconductive surface.

XIl shot and spot camera. The operations of the xJI television camera are timed as shown in FIG.

That is, in synchronization with the timing signal S2 indicating the start of each frame of the X-ray television system as shown in FIG. 2(a), the spot camera control signal S+o shown in FIG. 2(b) is generated.
is generated and input to the spot camera 11, the spot camera 1 sends one spot film to the exposure area,
In addition, the spot shutter is opened for the shutter opening time shown in FIG. 2(C), and X-rays are irradiated at the timing spot shown in FIG. 2(d). The output fluorescent image is photographed on a spot film via a half mirror 12. Furthermore, in synchronization with the timing signal S2, blanking is applied to the image pickup tube in the X-ray television camera 6 at the timing shown in FIG. 1
After the blanking period has elapsed, the beam is scanned over the photoconductive surface until the start of the next blanking, and the television signal 1[, as shown in FIG. S7 will be output.

As described above, a fluorescent image outputted from I-1 by one X-ray beam 1lpH irradiation is simultaneously photographed by the television camera 6 and the spot camera 11.

An image with high spatial resolution can be obtained by spot imaging, and at the same time, the television signal output from the X-ray television camera 6 is digitized and input to the image processing device 10, which automatically measures the cardiac volume. Dynamic image analysis can be easily performed. Image processing device 1
If image processing at 0 is performed at high speed, analysis results can be obtained in real time during image diagnosis.

Furthermore, since a spot film image with high spatial resolution and a television camera output image with high density resolution and easy image processing are captured simultaneously, the accuracy of diagnosis can be improved by correlating these images. This allows coronary angiography, which requires high-resolution images, and cardiac function testing, which requires dynamic analysis, to be performed simultaneously in a short time. Invasive effects such as double showering can be reduced.

Note that when the spot shutter is closed and an image is input from an X-ray television signal, the timing control section 1 generates an X-ray request signal S3 and inputs the image.

Although one embodiment of the present invention has been described in detail above, this invention is not limited to the above-mentioned embodiment, and can be implemented with appropriate modifications within the scope of the gist of the invention. Not even.

In the apparatus of the present invention, when only spot photography is required, each part may be operated to enable only spot photography.

[Effect of the invention 1] According to the invention detailed above, television shooting and spot shooting can be performed simultaneously in synchronization with the XMA shooting,
Images with high spatial resolution from spot photography and images with high density resolution from television photography can be correlated and observed, improving diagnostic accuracy.Furthermore, dynamic analysis can be performed in real time based on images from television photography. It is possible to provide an X-ray dynamic imaging diagnostic apparatus that can perform the following.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a timing chart showing the operation timing of each part when performing TV shooting and spot shooting in synchronization with X-ray radiation in the embodiment. FIG. 3 is a block diagram showing the configuration of the spot camera in the embodiment. 1...timing control section, 5...xI! Tube, 6...
- X-ray television camera (device), 1o... Image processing device, 11... Spot camera. Agent Patent attorney Kensuke Norichika (and 1 other person) Figure 2 (f) ・

Claims (2)

[Claims] (1) An X-ray tube, an image conversion device that converts an X-ray image created by X-rays emitted from the X-ray tube and transmitted through the subject into a light image, and a light image outputted from the image conversion device that is displayed on a television. an X-ray television camera device that takes pictures and outputs television signals; an image processing device that processes the television signals output from the X-ray television camera device and performs dynamic analysis; and an optical image output from the image conversion device. a spot photographing device that photographs the X-rays on a spot film;
Operates line television camera equipment and spot photography equipment,
X characterized by comprising a timing control unit that operates the television shooting and spot shooting devices and controls each of the devices to enable simultaneous shooting of the television shooting and spot shooting.
Line image diagnostic equipment. (2) The spot imaging device includes a shutter that can be controlled by the timing control unit, and performs spot imaging by releasing the shutter once every multiple X-ray exposures, and performs spot imaging for each X-ray exposure. 2. The X-ray image diagnostic apparatus according to claim 1, wherein the X-ray image diagnostic apparatus performs television imaging.