JPH04129390A - X-ray tomography - Google Patents

Abstract

PURPOSE:To obtain a television image as a still image at film pickup by controlling an X-ray tube device, an image pickup, an X-ray video camera device and a picture processor to the X-ray tomography. CONSTITUTION:A timing controller 10 outputs an X-ray request signal according to the entry of the operator. Thus, an X-ray tube device 3 exposes an X-ray pulse according to a prescribed X-ray exposure condition via an X-ray controller 2 and a high voltage generator 1. Moreover, the controller 10 takes an actual delay in the production of X-ray into account to give a pickup start signal just before the X-ray is generated immediately to an X-ray television camera device 9. Thus, device 9 blanks a photoconductive face of the image pickup tube as to a frame at the exposure of the X-ray and a fluorescent image outputted from an I.I.5 is stored on the photoconductive face via a half mirror 7. After the end of exposure of the X-ray, blanking is released in matching with the vertical synchronizing signal and the photoconductive face is subject to beam scanning and a television signal is outputted. The outputted television signal is inputted to a picture processing unit 11, in which the signal is digitized and a still image is displayed on a television monitor 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an X-ray fluoroscopic imaging device that can simultaneously perform film (or photograph, hereinafter the same) photography and television photography.

[Prior Art] Conventionally, this type of X-ray fluoroscopic imaging apparatus used for gastric mass examinations, etc. has an image intensifier (hereinafter referred to as 1.
The light image emitted from the camera is divided into two through a half mirror, one of which is used as an indirect photographed image (film photographed image), and the other is provided to a television camera device for monitoring.

[Problems to be Solved by the Invention] In the above-mentioned conventional device, the operator can view the image at the moment of shooting on a TV monitor, so the operator only needs to check the area to be shot, the exposure state, and the success or failure of the TV shooting itself. I can do it. Diagnosis is performed using film on which the photographed image has been imprinted, but as it takes time to develop the film, the success or failure of film photography cannot be immediately determined, and subjects who have ingested barium contrast agent may not have the opportunity to take a photo. Failure is not allowed.

However, in the conventional device, the television image obtained during film shooting is an instantaneous image only at the time of shooting, and therefore it is not possible to check the details of the television image at the time the shot image is obtained on the monitor. Although it is possible to check the X-ray input and the body position, it is possible to check the affected area necessary for film diagnosis, how the barium contrast agent adheres to the inner wall of the stomach, whether the exposure and image quality are good or not, in other words whether re-imaging is necessary, etc. in an instant. The problem was that it could not be confirmed.

The present invention makes it possible to obtain a still image from a TV image during film shooting, and to check the affected area necessary for film diagnosis, how to apply barium contrast agent to the inner wall of the stomach, and whether the exposure and image quality are good or not, in other words, re-shooting. It is an object of the present invention to provide an X-ray fluoroscopic imaging device that can confirm the necessity of diagnosing and improve diagnostic efficiency.

[Means for Solving the Problems] The above object includes an X-ray tube device, an image conversion device that converts an X-ray image formed by X-rays emitted from the X-ray tube device and transmitted through a subject into a light image. , a photographing device for photographing or filming the light image from the image conversion device or the X-ray image; an X-ray television camera device for photographing the light image from the image conversion device; an image processing device that processes the output television signal to display a desired image, and operates the photographing device and the X-ray television camera device in synchronization with the X-ray exposure to perform television photography and photography or film photography. This is achieved by providing a timing control device that controls each part of the device so that the images can be simultaneously photographed and the image taken on television can be displayed on the image processing device as a still image.

When the photographing device is a spot camera device, a light image distribution device is added that distributes the light image emitted from the image conversion device into two directions. In this case, a light image from one light image output section of the light image distribution device is given to the X-ray television camera device, and a light image from the other light image output portion is given to the spot camera device.

[Operation] The co-timing control device operates the imaging device and the X-ray television camera device in synchronization with X-ray exposure, performs simultaneous television photography and photography or film photography, and freezes the television image. Each part of the apparatus, mainly an X-ray tube apparatus, a photographing apparatus (a spot camera apparatus, a film photographing apparatus such as a film cassette or a film speed copy apparatus), an X-ray television camera apparatus, and an image processing apparatus, can be displayed as an image by the image processing apparatus. Control the device.

This makes it possible to obtain a still image of the television image during film shooting, which helps in confirming the affected area, which is necessary for film diagnosis, how the barium contrast agent adheres to the inner wall of the stomach, and whether the exposure and image quality are good or not. It is possible to confirm whether or not it is necessary, thereby improving diagnostic efficiency.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an X-ray fluoroscopic imaging apparatus according to the present invention.

In this FIG. 1, 1 is a high voltage generator, and this high voltage generator 1 applies a high voltage to the X-ray tube device 3 according to the X-ray radiation conditions inputted in advance to the X-ray controller 2. It is.

An image conversion device, here 1.1.5, is arranged opposite to the X-ray tube device 3 with the subject 4 in between.

6 is a light image distribution device that distributes the light image emitted from 1.1.5 in two directions, and the half mirror 7 that constitutes the main component is:
The fluorescent image emitted from step 1.1.5 is made incident on the spot camera device 8 and the X-ray television camera device 9.

In this case, the X-ray television camera device 9 forms a latent image on the photocathode by blanking its image pickup tube during X-ray exposure by receiving an imaging start signal from the timing control device 10. After canceling blanking, the beam scans the photoconductive surface and outputs a television signal. As the beam scanning method at this time, sequential scanning is preferable in order to reduce flicker.

The image processing device 11 receives a television signal from the X-ray television camera device 9 into its main body 12, digitizes the input television signal according to a control signal output from the timing control device 10, and then stores the input television signal in a memory (Fig. (not shown) and output it to the television monitor 13 as a still image.

The image processing device 11 performs real-time processing, such as noise reduction processing using a cursible filter, in addition to displaying a still image of the digitized image data. This is switched by a signal input by the operator who resumes fluoroscopy.

Here, the operation of the timing control device 10 and each unit thereof will be described in detail. Timing control device 1
0 outputs an X-ray request signal according to the operator's input. Thereby, X-ray pulses are emitted from the X-ray tube device 3 via the X-ray controller 2 and the high voltage generator 1 in accordance with predetermined X-ray exposure conditions.

In addition, the timing control device 10 takes into account the delay in the actual generation of X-rays and gives an imaging start signal to the X-ray television camera device 9 immediately before the actual generation of X-rays.

As a result, the X-ray television camera device 9 blanks the photoconductive surface of the image pickup tube for the frame at the time of X-ray exposure, and
．． A fluorescent image outputted from 1.5 is accumulated on the photoconductive surface via a half mirror 7. After the end of X-ray exposure (the end of film photography, which will be described later), blanking is canceled in accordance with the vertical synchronization signal, the beam scans over the photoconductive surface, and a television signal is output. The output television signal is input to an image processing device 11, digitized, and then displayed on a television monitor 13 as a still image.

The timing control device 10 gives a shooting start signal to the X-ray television camera device 9 and at the same time gives a shooting start signal to the spot camera device 8, so that film shooting is performed simultaneously with the still image shooting. Therefore, by observing the above-mentioned still image, it is possible to observe the photographed film image, mainly to confirm whether re-photographing is required.

After the TV shooting for obtaining the above-mentioned still image is completed, when the operator gives a fluoroscopic input signal when fluoroscopy is restarted, the image processing device 11 stops displaying output 1 of the still image, and performs real-time processing (output 1 of the fluoroscopic image). display) and the inspection continues.

The image processing device attached to the television camera device 9 normally outputs the input image as it is, but upon receiving the shooting start signal, it operates to capture the image immediately after that and output it as a still image. This allows the operator to observe the photographed image (actually, the television image at the time the photographed image was obtained, that is, the above-mentioned still image) for as long as necessary. If the quality of the obtained image is insufficient, film photography can be repeated at that point, so that the inspection does not end with insufficient photography.

In the above-described embodiment, the spot camera device 8 is used for film photography, but an X-ray image film photography device (such as a film cassette or a film speed copying device) for photographing an X-ray image on film may be used. In this case, the optical image distribution device 6 becomes unnecessary.

In addition, controlling the gain and optical aperture of the X-ray television camera device 9 so that the brightness signal is constant during fluoroscopy and during imaging is important in determining whether or not re-imaging is necessary by regarding a still image as a film image. This is effective for controlling the exposure of still images.

``Effects of the Invention'' According to the present invention, it is possible to obtain a still image of a television image during film shooting, which can be observed for as long as necessary. This has the effect of making it possible to check how the barium contrast agent is deposited, the exposure, and the quality of the image, in other words, whether or not re-imaging is necessary, thereby improving diagnostic efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the apparatus of the present invention. 1...High voltage generator, 2...X-ray controller, 3...X
Ray tube device, 4... Subject, 5/[1, (image conversion device), 6... Light image distribution device, 7... Half mirror
18... Spot camera device, 9... X-ray television camera device, 10... Timing control device, 11... Image processing device, 12... Image processing device main body, 13...
TV monitor.

Claims (1)

[Scope of Claims] 1. An X-ray tube device, an image conversion device that converts an X-ray image of X-rays emitted from the X-ray tube device and transmitted through a subject into a light image, and this image conversion device a light image distribution device that distributes a light image emitted from the light image in two directions; an X-ray television camera device that photographs a light image from one of the light image output portions of the light image distribution device; and this X-ray television camera. an image processing device that processes a television signal output from the device to display a desired image; a spot camera device that spots a light image from the other light image emitting section of the light image distribution device; and the X-ray The apparatus operates the X-ray television camera device and the spot camera device in synchronization with exposure, performs simultaneous television photography and spot photography, and enables the television photography image to be displayed as a still image on the image processing device. An X-ray fluoroscopic imaging apparatus characterized by comprising a timing control device for controlling each part. 2. An X-ray tube device, an X-ray image film photographing device that photographs on film an X-ray image of X-rays emitted from the X-ray tube device and transmitted through the subject, and converts the X-ray image into a light image. an X-ray television camera device that photographs a light image from the image conversion device; and an image processing device that processes a television signal output from the X-ray television camera device to display a desired image. and operating the film photographing device and the X-ray television camera device in synchronization with the X-ray exposure to perform simultaneous photographing of film and television, and using the television photographed image as a still image in the image processing device. An X-ray fluoroscopic imaging apparatus, comprising: a timing control device that controls each part of the apparatus to enable display. 3. The image processing device outputs the input television signal as is or performs real-time image processing during a fluoroscopic examination other than imaging, and continuously outputs the captured image as a still image during imaging;
3. The X-ray fluoroscopic imaging apparatus according to claim 1, wherein the still image output is canceled when fluoroscopy is restarted from this imaging, and the output of the input television signal or real-time image processing is returned to. 4. The X-ray television camera device according to claim 1 or 2, wherein at least one of its gain and optical aperture is controlled so that the luminance signal is constant during fluoroscopy and during imaging. X-ray fluoroscopy equipment. 5. The X-ray fluoroscopic imaging according to claim 1 or 2, wherein the X-ray television camera device stops beam scanning during imaging, and starts beam scanning in accordance with a vertical synchronization signal after imaging is completed. Device. 6. The X-ray fluoroscopic imaging device according to claim 1 or 2, wherein the X-ray television camera device performs beam scanning using a sequential scanning method.