JPS62127035A - X-ray diagnostic 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 [Field of Industrial Application] The present invention belongs to the technical field of X-ray imaging devices, and particularly relates to an X-ray diagnostic device using digital radiography.

[Conventional technology] x! The I diagnostic device is generally constructed as shown in FIG. 1 is an Xl1il tube that irradiates X-rays to the subject 3 when a high voltage generated by a high-voltage generator 2 is applied. 4 indicates an image intensity that receives an image of the X-rays irradiated by the Xm tube 1 and transmitted through the subject 3, and converts this image into an optical image. ia(1,1,), and this 1
．． The optical image outputted from 1.4 is projected into the imaging tube of the camera head shown at 6 via the optical system and aperture shown at 5, and then converted into a video signal at the camera control unit 7, and this video signal is The signal is input to a video processor shown at 8. In this video processor 8, the video No. 18 from the camera control unit 7 is passed through an input switch 9, and if necessary, a log converter (
logAml)) A/D indicated by 11 via 10
It is converted into a digital signal in a converter. Then, the video signal converted into a digital signal is subjected to appropriate arithmetic processing in an arithmetic unit indicated by 12, and then stored in a frame memory 1 indicated by 13. This frame memory 13 stores the X of the subject 3 before contrast medium injection.
This is a line image converted into a video signal.

Reference numeral 14 denotes a frame memory 2 having the same structure as the frame memory 13. This frame memory 14 is used to store a video signal obtained by converting an X-ray image of the subject 3 after injection of a contrast agent. The process leading to this is exactly the same as the process leading to storing the video signal in the frame memory 13. These two frame memories 13.1
The video signals of the two subject images stored in the subtraction unit 12 are subjected to subtraction processing in the arithmetic unit 12 to obtain a subtraction video signal. And this navtraction video signal ii! It passes through an i-image enhancement circuit 15, is converted into an analog signal by a D/A converter shown at 16, and is sent to a monitor shown at 17 outside the video processor 8 for display on the monitor. The data is sent to a recorder and recorded on a video disc. Note that within the video processor 8 there is a D/Δ converter 19 that converts the video signal of the subject image stored in the frame memory 13 or the frame memory 14, which is not subject to sub-1-transaction, into an analog signal.
The video signal outputted from 9 can be input to a monitor 20 to be visualized. Further, an analog video signal outputted from one or more D/A converters 16 is transmitted to a multi-format camera 21 and can be recorded on film. still,
The output signal of the video disk recorder 18 is sent to the input switch 9 of the video processor 8 at any time and applied to the monitor 17 through the video processor 8 so that it can be visualized.

Note that 22 indicates an XvA interface, and 23 indicates a system controller and operation panel of the video processor 8.

[Problems to be Solved by the Invention] By the way, the conventional X-ray diagnostic equipment as described above has some problems, including contrast imaging of the coronary arteries and other planar canals surrounding the heart. In order to perform this, a circulatory system imaging device is used, and this device accurately determines the position and condition of blood vessels that extend in various directions within the subject's body. ! In order to grasp the subject, two different
A diagnostic procedure called pie-brain, in which images are taken from different directions simultaneously using different tiangular systems, is being implemented. However, the conventional! In this case, it is necessary to use two devices including an image processing system, or to change the direction and compare images twice, which makes the overall configuration of the imaging system complicated and the system This has the disadvantage of increasing the overall cost. Also, along with that,
It also had the disadvantage that the operation was extremely complicated.

[Means for Solving the Problems 1] The present invention eliminates the above-mentioned drawbacks.
As shown in the figure, two sets of X-ray image detection systems sandwiching the subject 3 are installed at different angles (b. From the F and L camera heads 6.106 of these two sets of X-ray image detection systems The analog video signal obtained is switched to output one of the obtained analog video signals to the next stage by the input switch 9 which is i++1 tall in the system controller 23.After that, the processing is performed in the same manner as the conventional device described above, such as subtraction, image enhancement, etc. The images are processed and displayed on monitors 17 and 20 for diagnosis.

[Function] The device configured as described above is controlled as follows. That is, the system controller L-roller 23 alternately sends control signals to the F and L side X-ray tubes 1 and 101 via the interface 22 to irradiate X-rays. In synchronization with this, the system controller 23 also outputs the control signal (Fi) to the camera control units 7 and 107 on both the L side and the input switch 9. As a result, at the first timing, the X A video signal obtained by exposure of the wire tube 1 is output to the A/D converter 10 via the input switch 9, subjected to bimodal processing, and then displayed.

At the second timing, the video signal ti produced by the radiation from the L side X-ray tube 101 is outputted to the A/D converter 10 via the input switch 'a9, subjected to image processing, and then displayed. In this way, image I1g! The unit is single, and input signals from each camera head for each X-ray meditation are appropriately switched by an input switcher 9.

(Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

1 is an X-ray tube that irradiates X-rays to a subject 3 when a high voltage generated by a high-voltage generator 2 is applied. 4 is an image intensifier that receives an image of X-rays emitted by the X-ray tube 1 and transmitted through the subject 3, and converts this image into an optical image. The optical beam output from 1.4 passes through the optical system and aperture shown at 5, is projected into the Mrt image whistle of the camera head at 6, and is converted into an image @1 word at the camera control unit 7. and this reflection ('tjl (fi T'r is 8
is input to the measuring via A 1:1 processor. The above is the X-ray system that goes to the L side, and the same goes for the X-ray system on the other L side.In other words, the X-ray tube 101 is The transmitted image of the object generated by this is as follows: 1.1.104.Optical system 105, 7] Camera head 106. Camera control [1-L unit 107]
is inputted to a video processor shown at 8 via. The system controller 23 in the video processor 8 has a built-in synchronization signal generator (not shown) and outputs a vertical synchronization signal (hereinafter referred to as a VD signal).
For example, a pulse is generated for each field in synchronization with the signal and supplied to the interface 22. Incidentally, this VD signal is also supplied to the L side and the camera heads 6.106 on the L side. The interface 22 divides the frequency of the input pulse, and as shown in FIG.
It is supplied to each high pressure generator 2°102 on the L side. As a result, high pressure is supplied to both the L-side and L-side X-ray tubes 1, 101, and X-rays are alternately generated.

First, in synchronization with the first VD signal, the F side Xtil tube 1 is
When Fil is exposed, r, f, 4 and optical system 5 on the L side
An optical image is input to the camera head 6 on the left side via the 1100-degree side, and is accumulated on its photocathode.Then, an image accumulated on the camera head 6 from the left side in synchronization with this at the time of the second VD signal is transmitted. The information is read out and its video signal is output.Furthermore, at the time of this second VD signal, X-rays are emitted from the L-side X-ray beam 101, and the image transmitted by the X-rays is transmitted to the L-side camera head 106. Then, the image information accumulated on the L side is continuously outputted at the time of the third VD signal.

In this way, the video signal which is alternately 1q on the L side and L side for each field is inputted alternately to the input switch 9 via each camera control unit 7.107 in the next stage, and is controlled by the system controller 23. Depending on the signal, the L side is alternately moved as shown in Fig. 2 (6).

One of the L sides is selected and sent to 10 A/D converters.

Convert to digital signal with A/D converter 1o.

The resulting video signal (for example, the L side) is sent to the arithmetic unit 12 via the log converter 11, subjected to appropriate arithmetic processing, and then stored in the frame memory 13.

Similarly, the L-side video signal sent in the next field is stored in the frame memory 13a.

Also, 14.14a indicates frame memory 13.1
The frame memories 14 and 14a have the same structure as the frame memories 14 and 14a, and the frame memories 13 and 13a described above store images of the subject 3 before contrast agent injection, and the frame memories 14 and 14a have the same structure.
An image of the subject 3 after contrast medium injection is stored in .

These four frame memories 13.13a, 14.1
The two types of subject video signals stored in the frame memories 13 and 14 and the pair of frame memories 13a and 14a are subjected to subtract processing in the focusing unit 12, and are input to the image enhancement circuit 15 at the next stage.

This circuit processes the subtract image, for example, by emphasizing the edge of the blood vessel, to make it easier to see. After that, on the F side,
The image on the processing surface 81h<F side of each side is converted into an analog signal by the D/A converter 16, and the image on the L side is converted into an analog signal by the D/A converter 19, and is output to each monitor shown at 17.20 and displayed. provide Further, the outputs of the D/A converters 16 and 19 are also output to video disc recorders (hereinafter referred to as VDRs) 18 and 24, respectively, and are configured to be recorded on a disc.

The outputs of the VDRs 18 and 24 are connected to the aforementioned input switch 9 in the video processor s, and in response to a control signal from the system controller 23, the outputs of the VDRs 18 and 24 are switched to the video signals from the camera control unit 7 and 107 for processing by the processor 8. It can be provided to This makes it possible to perform image processing on past images recorded on the VDR again and display them.

Next, a second embodiment will be described based on FIG. Although the configuration is the same as the block diagram shown in FIG. 1, the timing of X-ray exposure and the timing of LLI images are different. In other words, the F-side and L-side X-ray image detection systems are set to different parts of the subject 3 (for example, the front and back parts of blood flow in the same blood vessel J3).
For example, as shown in the timing shown in Figure 3,
The tube 1 is exposed to a predetermined brightness (see Fig. 3 (1)) for a period of time before the contrast agent reaches the X position of the blood vessel. (No. 8 is l'V (see figure (3))), and then the L side X-ray tube is set at the Y position distal to the X position of this blood vessel (see figure (2)). ), the video signal for a predetermined period before and after the arrival of the contrast agent is placed at this Y position.
4)). This has the excellent effect of being able to diagnose two areas of the subject with one injection of z ti and five drugs.

Next, a third embodiment will be described with reference to FIGS. 4 and 5. This third embodiment is the same as the first embodiment described above in that it uses two camera heads that receive external synchronization signals, but the portion corresponding to the video processor 8 in FIG. 1 is replaced with the one in FIG. It is structured as follows. In other words, a video signal with an aspect ratio (width-to-vertical ratio of an image) of 4=3 is sent from the D/A converter 16.19 to a monitor with an aspect ratio of 4:3.
Both the side and L side are supplied. At the same time, the output of the image enhancement circuit 15 is supplied to a pair of speed conversion circuits 25 and 26, and converted as shown in FIG. That is 4:
The third monitor 17.20 displays, for example, a circular perspective image with galactor information related to this image added to the side.
When displaying this image data on a monitor 27.28 with an aspect ratio of 1:1, which is used for displaying general perspective images, a circular image area portion is determined for each horizontal scanning line, and the readout speed for this portion is set to l- ID signal (horizontal synchronization signal)
The output is output at a slightly slower speed. The video signal output after undergoing such processing is converted into an analog signal by a D/A converter 29.30 and supplied to a 1:1 monitor 27.28.

The 1:1 monitors 27 and 28 for general fluoroscopy not only display image-processed video signals from the video processor 8, but also directly input and display video signals from each camera head 7 and 107. It is also possible to do so. For this purpose, a pair of changeover switches 31 and 32 are provided, which can be selected as required by control signals from the system controller 23.

In addition, all of the above-mentioned embodiments are explained using two systems of X-rays (gI detection system, but three or more systems may be provided. In this case, it is necessary to control the collection timing according to the number of systems. .

[Effects of the Invention] According to the present invention described above, although the configuration is extremely simple, it is possible to
f! It is possible to provide an X-ray diagnostic apparatus that collects images during shadowing by injecting a contrast medium once and can perform 11 desired image processes.

[Brief explanation of drawings]

FIG. 1 is a diagram showing one embodiment of the present invention, FIG. 2 is a time chart showing the operation of the device shown in FIG. FIG. 4 is a partial block diagram showing a third embodiment of the present invention, FIG. 5 is a diagram that does not show the operation of the apparatus shown in FIG. 4, and FIG. 6 is a block diagram showing a conventional X-ray diagnostic apparatus. 1.101... X-ray tube, 2,102... High pressure generator 3... Subject, 4,104...1. I. 5.105...Optical system 6.106...Camera head 8...Video processor, 9...Input switch 10.
・・A/D converter 16.19...D, / A converter 17.20・
··monitor

Claims (2)

[Claims] (1) An X-ray image detection system consisting of a plurality of pairs of X-ray tubes and imaging members arranged with the subject in between, and any one of the video signals output from the plurality of X-ray image detection systems. an A/D converter that digitizes the output from this switching means; an image processing means that inputs the output of this A/D converter and performs predetermined image processing; A D/A converter that converts the output from the image processing means into an analog signal, a display means that receives the output of the D/A converter and displays an image based on the output, and controls the X-ray image detection system. An X-ray diagnostic apparatus comprising system control means for also controlling the selection in the switching means in synchronization with the X-ray diagnostic apparatus. (2) The X-ray according to claim 1, wherein the output of the image processing means is inputted, converted to a speed corresponding to the display area of the display means, and outputted to the display means for display. Diagnostic equipment.