JPS61172544A - 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 relates to an X-ray diagnostic apparatus using an X-ray sensor array.

Conventional technologyIn X-ray photography using X-ray film or X-ray television (a combination of an image intensifier and image pickup tube), a fixed planar X-ray beam is used to perform the image, so it is necessary to confirm the imaging range. It was easy to apply the illumination light. Also, in imaging equipment such as computed tomography (CT) that uses fan beam X-rays and an X-ray sensor array, the fan beam X-rays and X-ray sensor array rotate around the axis of the object to be inspected. However, the relative positional relationship remains the same, and it is easy to confirm the irradiation position.

Problems to be Solved by the Invention However, in an X-ray diagnostic apparatus that scans an object to be inspected with fan beam X-rays and an X-ray sensor array to obtain a transmitted X-ray image, fan beam X-rays and an Since the array scans across the irradiation field and the subject, the irradiation position changes over time, making it difficult to confirm the position of the irradiation field and the subject before irradiation.

Means for Solving the Problems The technical means of the present invention for solving the above problems is to superimpose visible light on fan beam X-rays to visualize the position of the fan beam X-rays, and to The X-ray and X-ray sensor arrays are fixed at the central position of the irradiated hepatic portal.

Function: With the subject being examined on the bed of the X-ray diagnostic equipment, the fan beam X-rays and X-ray sensor array are fixed at the central position within the Kumano field before and after imaging, and the fan beam X-rays are emitted using illumination light. By visualizing the irradiation position, it is possible to confirm whether the imaged part of the subject is located in the center of the X-ray irradiation field before irradiation and after face sealing, and as a result, it is possible to reduce imaging errors.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing the basic configuration of the present invention. The X-rays emitted from the X-ray generator 1 are converted into a Schiffian beam X-ray by the slit 2, and are irradiated onto the X-ray sensor array. Above X
By changing the positional relationship between the ray generator 1, slit 2, and the X-ray sensor array, the X-ray sensor array can be moved from the 3' position to the 3' position.
If the fan beam X-ray is scanned to the position ' and the fan beam X-ray is also scanned, if an object exists in the fan beam, an X-ray transmission image of the object can be obtained. In addition, the illumination light source 4. When the light beam is shaped using the mirror 5 and the slit 2 so as to be superimposed on the fan beam X-ray,
The irradiation position of the line can be visually confirmed. If the area to be subjected to X-ray photography is the area surrounded by the positions of X-ray sensor arrays 3' and 3', the area to be imaged can be confirmed using visible light during the photography, that is, during the scan, but before the photography, i.e. Positioning cannot be performed without scanning. Therefore, before photographing, that is, before starting the scan, the fan beam Xa and the X-ray sensor array 3 are fixed at the center position of the photographing range, and only the light flux 6 from the illumination light source 4 is irradiated. The line can be visually observed, and the position of the imaging site can be determined when the subject is placed in the imaging range. Furthermore, if the camera is configured to return to the center position after the shooting is completed, as before starting, it becomes possible to confirm the position after the shooting and prepare for the next shooting.

FIG. 2 is a diagram showing the operation when applied clinically. It is possible to photograph a range indicated by a photographing range 13 on the top plate 11 of the X-ray diagnostic apparatus. The object to be inspected 1 is placed on this top plate 11.
2, even if a mark indicating the imaging range 13 is placed on the top plate 11, it will be hidden behind the subject 12, making it difficult to confirm the imaging region.

Therefore, if an illumination line 14 is created at the center of the imaging range 13 using the light flux from the illumination light source, the illumination line 14 can be visually observed on the object 12 and the target imaging area is within the imaging range 13. You can confirm that it is in the designated position. After this confirmation, the X-ray fan beam and
If the line sensor is scanned, for example, in the direction of the arrow in the figure, accurate imaging of the imaging region becomes possible.

Although one embodiment of the scanning method has been described above, the following method is also available as an illumination method for confirming the center position before photographing. In other words, when imaging is not performed, the light flux from the illumination light source and the position of the X-ray sensor array do not need to be fixed at the same position; the light flux returns to the center position of the imaging range before and after imaging, but the X-ray sensor array is located at the starting point. A similar effect can be obtained by returning the camera to the position shown in FIG. One way to improve the accuracy of photographing position is to use a light bulb or laser light as a light source, by providing a mask that cuts only visible light in a part of the slit, and placing a line center point and a distance scale on the illumination line 14 in Figure 2. By creating a mark, it is possible to further improve the accuracy of confirming the location of the irradiated area.

Furthermore, when a laser beam is used as a light source, it is also possible to modulate the laser output and mark the center point or the like on the illumination line.

Effects of the Invention The present invention provides an X-ray diagnostic apparatus that scans fan beam X-rays and an X-ray sensor array to obtain an X-ray image. By fixing it at the center of the range and illuminating the center line with visible light, it is extremely easy to confirm the location of the area to be imaged on the object to be inspected, which in turn makes it possible to prevent accidents such as imaging mistakes. It is.

[Brief explanation of drawings]

FIG. 81 is a diagram showing the basic configuration of the present invention, and FIG. 2 is a diagram showing the operation when applied clinically. 1...X-ray generator, 2...Slit,
3...X-ray sensor array, 4...Illumination light source, 5...Mirror, 6...Light flux, 1
3... Shooting range, 14... Lighting line. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
figure! ×Ryosuke Moat

Claims (4)

[Claims] (1) Equipped with a generator that generates fan beam X-rays, an X-ray sensor array that detects fan beam X-rays, and an illumination light source, and converts the luminous flux from the illumination light source into fan beam X-rays for X-ray irradiation. Visualize position, fan beam X-ray and
An X-ray diagnostic device characterized by visualizing the central position of the imaging range by positioning the fan beam X-ray and the X-ray sensor array at the center of the imaging range before and after scanning the radiation sensor array and performing imaging. . (2) The X-ray diagnostic apparatus according to claim 1, wherein the illumination light source comprises an illumination light bulb and a reflector. (3) The X-ray diagnostic apparatus according to claim 1, wherein the illumination light source comprises a laser light source and a rotating mirror. (4) The X-ray diagnostic apparatus according to claim 1, characterized in that a mask is provided on a part of the light flux generated from the illumination light source, and shadows are created in the center of the light flux or at equidistant positions of the light flux.