JPS62137989A - X-ray diagnostic device - Google Patents

Abstract

PURPOSE:To display information required for diagnosis such as photographic conditions of a body to be examined, by performing the operation processing and the speed conversion processing of a video signal to output video signals of two systems, namely, 1:1 aspect ratio and a different aspect ratio. CONSTITUTION:This device is provided with the first display means 25 which displays a picture at 1:1 aspect ratio, the second display means 26 which displays a picture at 4:3 aspect ratio, and a video processor 80 which performs the operation processing and the speed conversion processing of the video signal outputted from a TV camera 81 and outputs video signals of two systems used for picture display of the first and second display means 25 and 26. Since information required for diagnosis such as photographic conditions of the body to be examined and operation processing conditions of the video signal are displayed sufficiently together with the processed picture, the diagnostic capacity is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] 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.

[Technical background of the invention and its problems]

An X-ray diagnostic apparatus is generally constructed as shown in FIG. Reference numeral 1 denotes an X-ray tube, which irradiates the subject 3 with X-rays when a high voltage generated by the X-ray high voltage device 2 is applied. 4 is the X that was irradiated by this X-ray tube 1 and passed through the subject 3.
X-rays that receive an image by yA and convert this image into an optical image.
Optical conversion means such as image intensive eye (I.
(2) The optical image output from the l-14 is projected into the imaging tube of the camera head 6 via the optical system and the aperture 5, and then converted into a video signal by the camera control unit 7. This video signal is output to the video processor 8. In this video processor 8, a video signal from a camera control unit 7 is taken in via a manual switch 9, and an A/D (analog/digital) converter 10 and a log converter 1 as necessary.
1, undergoes appropriate arithmetic processing in the arithmetic unit 12, and then stores it in the first frame memory 13.

What is stored in the first frame memory 13 is an X-ray image of the subject 3 before injection of the contrast medium, which is converted into a video signal. Reference numeral 14 denotes a second frame memory having the same structure as the first frame memory 13, and this second frame memory 14 stores a video signal obtained by converting an X-ray image of the subject 3 after contrast agent injection. The process leading to the storage is carried out in the first frame memory 13.
The process by which video signals are stored is exactly the same. This first. The video signals of the two subject images stored in the second frame memories 13 and 14 are subjected to subtraction processing in the arithmetic unit 12 to obtain subtraction video signals. This subtraction video signal is passed through the image enhancement circuit 15, converted into analog by the D/A converter 16, and sent to the monitor 17 outside the video processor 8 for display on the monitor, and also sent to the video disk recorder 18. It is designed to be sent out and recorded on a video disc. Note that a D/A converter 19 that converts a video signal that is not subjected to subtraction processing into an analog signal is arranged in the video processor 8, and this D/A converter 19 converts a video signal that is not subjected to subtraction processing into an analog signal.
The video signal output from the converter 19 can be input to a monitor 20 and visualized. Also, D/A
The analog video signal output from the converter 16 or 19 can be transmitted to the multi-format camera 21 and recorded on film, and the output signal of the video disc recorder 18 can also be transmitted to the video processor 8 using the manual switch at any time. It is also possible to send the data to the monitor 17 through the video processor 8 and visualize it. Note that 22 is an X-ray interface, and 23 is a system controller that controls the operation of the video processor 8 and the like.

By the way, in such conventional X-ray diagnostic equipment,
Since the input fluorescent surface 114 is circular, the aspect ratio of the monitor for displaying images is usually set to 1:1. When characters and the like are displayed together with images, priority is given to the images, and the characters and the like are displayed at the four corners of the display screen so that the characters and the like do not overlap with the images.

However, in this type of display, the amount of characters etc. that can be displayed is limited, so there is a problem in that it is not possible to sufficiently display information necessary for diagnosis, such as the imaging conditions of the subject and the arithmetic processing conditions of the video signal. Live points. The above problem can be solved by displaying the text smaller, but this not only makes it difficult to see the text displayed on the monitor, but also makes it difficult to see the text on the film when recording on film with a multi-format camera. It is no longer recognizable.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to sufficiently display information necessary for diagnosis, such as the imaging conditions of the subject and the arithmetic processing conditions of the video signal, along with images. The object of the present invention is to provide an X-ray diagnostic device that can perform

[Summary of the invention]

The present invention provides an X-ray-optical image converter that converts an X-ray image obtained by irradiating an X-ray toward a subject into an optical image, and a device that captures this optical image and outputs a video signal. In an X-ray diagnostic apparatus that has a television camera and visualizes an X-ray image of the subject based on the video signal for diagnosis, a first display means that displays an image at an aspect ratio of 1:1; a second display means for displaying an image with an aspect ratio different from the aspect ratio of the first display means; and performing arithmetic processing on the video signal output from the television camera and speed conversion processing on the video signal; Said 1st. The apparatus is characterized in that it includes a video processor that outputs two systems of video signals to be used for image display on the second display means.

[Embodiments of the invention]

Hereinafter, the present invention will be specifically explained with reference to Examples.

FIG. 1 is a block diagram of an X-ray diagnostic apparatus that is an embodiment of the present invention. In the figure, parts having the same functions as those shown in FIG. ″
do. This X-ray diagnostic apparatus is largely different from conventional ones in that it has a first display means (monitor) 25 that displays images at an aspect ratio of 1:1, and an aspect ratio that is different from that of the first display means 25. A second display means (monitor) 26 that displays an image at a ratio of, for example, 4:3 performs arithmetic processing on the video signal output from the camera control unit 7, and performs speed change IQ processing on the video signal.
The present invention has a video processor 80 that outputs a system video signal, and the first display means 25 can be used for both x'gA perspective image display and processed image display by switching the switching means S. be.

Furthermore, the apparatus of this embodiment is equipped with a video tape recorder (VTR) 24, and is capable of recording a video signal to be displayed on the second display means 26.

It should be noted that a camera controller having an image pickup tube and a camera control unit 7 that outputs a video signal are used as a television camera 8.
Collectively referred to as 1.

Next, the internal configuration of video processor 80 will be described.

The configuration of this video processor 80 is different from the conventional video processor 8 because the output data (
In this embodiment, it has a speed conversion means 23 for converting digital data for aspect ratio display (4:3) into digital data for aspect ratio a1:1 display, and converts the conversion output of this speed conversion means 23 into D/ This is because the A converter 19 is configured to convert the signal into an analog signal. The detailed configuration of this speed converting means 23 will be explained below based on FIG. 2.

This speed conversion means 23 includes a buffer 30, AND circuits 31 and 34, and FIFO (First InF
irst Out (first in first out) 32 and a latch circuit 33. The image data (8-bit data for display with an aspect ratio of 4:3) output from the image enhancement circuit 15 (FIG. 1) is transferred to the buffer 3.
0 to the data input terminal (D) of the FIFO 32, and which area of the applied image data is to be captured depends on the area signal DMAREA. That is, while the area signal DMAREA is at a high level, the AND circuit 31 is activated, and image data is taken into the FIFO 32 at the timing of the clock CK75.

The captured image data is a 1:1 image area signal PI
During the period when FOA is at a high level, it is outputted at the timing of clock CK100, and is outputted to D/A converter 19 via launch circuit 33 arranged at a subsequent stage.

Incidentally, the area signal DMAREA, the 1:1 image area signal PIFOA, and the clocks CK15 and CK100 are output from the system controller 23 (FIG. 1).

The operation of the apparatus of this embodiment constructed as described above will be described in detail.

When an operation panel (not shown) is operated to perform an X-ray diagnosis, the X-ray high voltage device 2 generates a high voltage and the X-ray tube 1
irradiates X-rays toward the subject 3.

The X-ray image formed by the X-rays transmitted through the object 3 is converted into an optical image by the image intensifier (1-1) 4, and then transmitted through the optical system and diaphragm 5 into the imaging tube of the camera head 6. The image is then projected onto the camera control unit 7 and converted into a video signal, which is then input to the video processor 8.

In this video processor 8, the video signal is input to an A/D converter 11 via an input switch 9, and is converted into a video signal in the form of a digital signal. This video signal is input to the arithmetic unit 12 via the log converter 11, undergoes appropriate arithmetic processing in the arithmetic unit 12, and is stored in the first frame memory 13 or the second frame memory 14.

And this first one. The video signals of the two subject images stored in the second frame memory 13 and 14 are processed by the arithmetic unit 1.
2, subtraction processing is performed to obtain a subtraction video signal. This subtraction video signal passes through the image enhancement circuit 15, is converted into an analog signal by the D/A converter 16, and is sent to the second display means 26, where the image is displayed at an aspect ratio of 4:3.

Note that characters and the like are simultaneously displayed on the second display means 26 under the control of the system controller 23.

On the other hand, the output of the image enhancement circuit 15 is
The image data is also captured and converted into image data for display with an aspect ratio of 1:1. FIG. 3 shows the operation timing of this speed conversion circuit 23, and one frame is divided into 512
When using x512 matrix, area signal DMAR
EA high level period is 75ns x 512 = 38.4μs
, l:1 The high level period of the image area signal PIFOA is 1
00nsX512=51.2μs.

The video signal converted by the speed conversion means 23 is D/
After being converted into an analog signal by the A converter 19, it is sent to the first display means 25 via the switching means S, and an image is displayed at an aspect ratio of 1:1. Figure 4 is 1. This shows the relationship between image display on the second display means 25°26, and the first display means 25 has an aspect ratio of 1:
A processed image (subtract image) is displayed at l, and the processed image is displayed at an aspect ratio of 4:3 on the second display means 26, and additional information regarding this processed image, such as photographing conditions, processing conditions, etc. is displayed. Furthermore, X
When performing line perspective image monitoring, the video signal output from the camera control unit 7 may be selected by the switching means S and sent to the first display means 25. As a result, the first display means 25 displays x with an aspect ratio of 1:1.
The vA fluoroscopic image can be visualized.

In this way, in the device of this embodiment, the aspect ratio is 1:
The first display means 25 displays an image at an aspect ratio of 4:3, the second display means displays an image at an aspect ratio of 4:3, and performs arithmetic processing on the video signal output from the television camera 81. Speed conversion processing is performed, and the first. Since the video processor 80 outputs two systems of video signals to be used for image display on the second display means 25 and 26, the second display means 26 displays the processed image as well as the subject. It is possible to sufficiently display information necessary for diagnosis, such as imaging conditions for video signals, arithmetic processing conditions for video signals, etc., and it is possible to improve diagnostic performance. Further, the first display means 25 displays the video signal output from the video processor 80 and the television camera 81.
By switching and displaying the video signal output from the The X-ray diagnostic apparatus can be provided at a lower cost than when a dedicated monitor (display means) 20 is provided.

Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the above-mentioned embodiment, and that various modifications can be made.

For example, in the above embodiment, the image data for display with an aspect ratio of 1:3 is converted into image data for display with an aspect ratio of 1:1 by performing speed conversion processing. :1 display image data may be speed-converted to obtain image data for 4:3 aspect ratio display.

Note that the aspect ratio of 4:3 display is just one example, and may be determined as appropriate, taking into consideration the display characteristics of characters and the like.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to sufficiently display information necessary for diagnosis, such as the photographing conditions of the subject and the arithmetic processing conditions of the video signal, along with the image. It is possible to provide an X-ray diagnostic device, which can greatly contribute to improving diagnostic performance.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an X-ray diagnostic apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram showing a detailed configuration of a speed converting means in this embodiment, and FIG. 3 is an operation of the speed converting means. The timing diagram in FIG. FIG. 5 is a block diagram of a conventional X-ray diagnostic apparatus. 3... Subject, 4... Image intensifier (X-ray-optical image conversion means), 25... First display means, 26... Second display means, 80... Video "Official" Rosenosa, 81...TV camera.

Claims (6)

[Claims] (1) X-ray-optical image conversion means for converting an X-ray image obtained by irradiating X-rays toward a subject into an optical image;
In an X-ray diagnostic apparatus that has a television camera that captures this optical image and outputs a video signal, and visualizes an X-ray image of the subject based on this video signal for diagnosis, the aspect ratio is 1:1. a first display means for displaying an image with an aspect ratio different from that of the first display means; a second display means for displaying an image at an aspect ratio different from that of the first display means; and a video processor that performs speed conversion processing on video signals and outputs two systems of video signals that are used for image display on the first and second display means. . (2) The X-ray diagnostic apparatus according to claim 1, wherein the aspect ratio of the second display means is 4:3. (3) The video processor outputs a video signal for an aspect ratio display of 4:3 to the second display means, and outputs a video signal for an aspect ratio display of 4:3 to a video signal for an aspect ratio display of 1:1. The X-ray diagnostic apparatus according to claim 2, which converts the image signal into a video signal and outputs it to the first display means. (4) The first display means can be used for both X-ray fluoroscopic image display and processed image display by switching and displaying the video signal output from the video processor and the video signal output from the television camera. An X-ray diagnostic apparatus according to any one of claims 1 to 3. (5) The X-ray diagnostic apparatus according to any one of claims 1 to 4, wherein the X-ray-optical image conversion means is an image intensifier. (6) The X-ray diagnosis according to any one of claims 1 to 5, wherein the arithmetic processing in the video processor is subtraction processing between images taken before and after contrast agent injection. Device.