JPH0423538B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an X-ray photographing apparatus that records an X-ray transmitted fluorescent image whose brightness is amplified by an image intensifier tube on an X-ray film.

[Prior art] In mass examinations or adult disease examinations conducted to find patients with cancer diseases etc. from an unspecified number of examinees, it is necessary to calculate the X-ray exposure dose to the examinees who are diagnosed by X-ray photography. In order to reduce
The transmitted image formed by the radiation dose is amplified in brightness by an image intensifier, the image is observed on a television monitor, and when the image displayed on the television monitor is the desired one, it is transmitted from the television monitor to an X-ray film camera. Devices that take pictures by switching are widely used.

FIG. 7 is an example of an indirect photograph of the stomach at the time of medical examination for adult diseases. X-ray tube 2 is placed on the patient S lying on the support table 1.
X-rays are irradiated from the The irradiated X-rays pass through the subject S, are amplified in brightness by an image intensifier 3, are distributed to a television camera 5 by a light distributor 4, and an image is displayed on a television monitor (not shown).

When the desired image has been obtained, the X-ray image is guided to the X-ray film camera 7 attached via the lens barrel section 6 to the opposite side of the image intensifier tube 3 of the light distributor 5, and the recorded on film. In normal gastroscopy, the support stand 1 is moved as shown by A-A' and six to seven X-ray images are recorded.

In the above-mentioned X-ray imaging apparatus, the top surface of the support base 1 is set so that the patient S can easily move up and down the support base 1, and so that the X-ray technician can easily adjust the body position of the patient S. It is desirable that the distance l to the floor is approximately 700 to 750 mm. However, due to the physical limitations of the image intensifier tube 3, light distributor 4, X-ray film camera 7, etc., it is not always possible to obtain a height that makes it easy to ascend and descend.

[Problems to be Solved by the Invention] When changing the film, the support stand 1 is held upside down as shown in FIG. 8 in order to improve work efficiency.
In the conventional example described above, in order to shorten the distance l between the floor surface and the support stand 1, the film exchange back cover 7a and the support stand 1 are
This has the disadvantage that the space between the two becomes narrower, making it difficult to load and replace the film. In order to improve this drawback, when attaching the X-ray film camera 7 to the light distributor 4, it is necessary to remove the film exchange back cover 7a.
may be directed downward in FIG. 7, but as mentioned above, the distance l between the floor and the support base 1 must be long, and the patient S can be raised and lowered and the X-ray technician can
It becomes an obstacle when adjusting the body position. Therefore, at present, it is necessary to remove the photographing camera 7 from the light distributor 4 every time the film is replaced.

[Object of the Invention] In view of the above-mentioned drawbacks, an object of the present invention is to reduce the distance between the floor surface and the top surface of the support by making the X-ray film camera attached to the light distributor rotatable around the optical axis. An object of the present invention is to provide an X-ray photographing apparatus in which the film loading performance is improved by shortening the length of the film and rotating an X-ray film photographing camera when changing the film.

[Summary of the invention] The gist of the present invention for achieving the above object is as follows:
An X-ray tube that generates X-rays, a patient support stand, an image intensifier tube that amplifies the transmitted X-ray image, an optical distributor that distributes the output image of the image intensifier tube, and the optical distributor. A television camera and an X-ray film camera are connected to the light distributor to receive the output from the light distributor, respectively, and the X-ray film camera is rotatable at a predetermined angle with respect to the light distributor. This is a characteristic X-ray imaging device.

[Embodiments of the Invention] The present invention will be described in detail based on embodiments illustrated in FIGS. 1 to 6. Note that the same reference numerals as in FIG. 7 indicate the same members.

Figure 1 is a front view of the device in an inverted state;
In order to facilitate film replacement of the X-ray film camera 7, the camera 7 is rotated 90 degrees from the conventional state shown in FIG. 8, so that the back cover 7a can be opened and closed without any trouble. FIG. 2 is a front view of the photographing camera 7 in a photographing state, and FIG. 3 is a rear view of the photographing camera in a rotated state. . Lens barrel part 6
The connection between the photographing camera 7 and the lens barrel section 6 can be loosened or tightened by moving a lever 10 provided at the camera 7 in the direction of the arrow shown in FIG. The photographing camera 7 can be positioned relative to the lens barrel section 6 during photographing and when changing film. In addition, 12
indicates a hanging holder for the photographing camera 7.

Fig. 4 is a partial view of the connecting portion seen from the direction of arrow A in Fig. 2, Fig. 5 is a partial view taken from the direction of arrow B in Fig. 4, and Fig. 6 is a partial view taken along the - line in Fig. 4. FIG. The rotation shaft 10a of the lever 10 is connected to the lens barrel portion 6.
The two clamping ends 13 of the clamping member 13 provided in
a, 13b, and the tightening member 1
A cylindrical portion 14 on the photographing camera 7 side is fitted into the inside of the cylindrical portion 3 . Note that the clamping member 13 and the cylindrical portion 14 are able to rotate freely relative to each other when no clamping force is applied to the clamping member 13, but even in that case, accidental rotation cannot occur. To prevent this, considerable frictional resistance is applied to its rotation. Further, a protruding pin 15 operated by a spring is provided as a positioning mechanism 11 on the photographing camera 7 side.
This pin 15 is designed to fit into pin holes 16a and 16b provided in the tightening member 13, respectively. Further, the pin 15 is provided with a pin lever 15a, and the pin 1 is operated by operating the pin lever 15a.
5 can be pulled out from the pin holes 16a, 16b.

In the state shown in FIG. 2 in which the support stand 1 is raised to replace the film, the pin 15 is inserted into the pin hole 16a, and the tightening member 13 narrows the gap between the split portions d formed by the tightening ends 13a and 13b. Thus, the cylindrical portion 14 is in a tightened state. In order to rotate the X-ray film camera 7 as shown in FIG. 3 in order to change the film, the pin 15 is lifted upward by the pin lever 15a and pulled out from the pin hole 16a, and the lever 10 is rotated. Moving tightening end 1
When the gap d between the slotted parts 3a and 13b is widened and the tightening member 13 is loosened, the photographing camera 7 can be attached to the lens barrel part 6.
It can be rotated against. Shooting camera 7
When the photographing camera 7 is turned 90 degrees and directed to a predetermined position, the pin 15 enters the pin hole 16b by the force of the spring. Then, rotate the lever 10 and tighten the tightening member 1.
3 to tighten the cylindrical portion 14 on the photographing camera 7 side. In this state, as shown in FIG. 1, the back cover 7a of the photographing camera 7 faces toward a wider space, so that film can be easily loaded and replaced. Then, in order to use it again for shooting, move the shooting camera 7 in the reverse order and move it to the second position.
It may be oriented as shown in the figure.

[Effects of the Invention] As explained above, the X-ray imaging apparatus according to the present invention rotates the X-ray film imaging camera at the time of film loading/exchange, thereby adjusting the distance from the floor to the support stand during X-ray imaging. without lengthening the
Further, there is an effect that the work efficiency is improved when changing the film.

[Brief explanation of drawings]

The drawings show an embodiment of the X-ray imaging device according to the present invention, and FIG. 1 is a front view of the device in an inverted state, and FIG.
The figure is a front view of the photographing camera in a photographing state, and Figure 3 is a rear view of the photographing camera in a rotated state.
Figure 4 is a partial view of the connecting part seen from the direction of arrow A in Figure 2, Figure 5 is a partial view of the connecting part seen from the direction of arrow B in Figure 4, and Figure 6 is the - line in Figure 4. FIG. 7 is a front view of a conventional X-ray imaging apparatus in use, and FIG. 8 is a front view of the apparatus in an inverted state. 1 is a support stand, 2 is an X-ray tube, 3 is an image intensifier, 4 is a light distributor, 5 is a television camera, 6 is a lens barrel, 7 is an X-ray film camera, 10 is a lever, and 13 is a The tightening member includes a cylindrical portion 14, a pin 15, and pin holes 16a and 16b.

Claims (1)

[Claims] 1. An X-ray tube that generates X-rays, a patient support stand,
An image intensifier that amplifies an X-ray transmitted image, an optical distributor that distributes the output image of the image intensifier, and a television camera that is connected to the optical distributor and receives the output from the optical distributor, respectively. and an X-ray film camera, the X-ray film camera being rotatable at a predetermined angle with respect to the light distributor. 2. The X-ray imaging apparatus according to claim 1, wherein the rotation is locked at two rotation angles. 3. The X-ray imaging apparatus according to claim 1, wherein frictional resistance is applied to rotation of the X-ray film camera with respect to the light distributor.