JPS58149742A - Bed apparatus for radioactive ray tomography - 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 [Technical Field of the Invention] The present invention relates to a bed apparatus for radiation tomography used when performing imaging in a radiation tomography apparatus, such as a CR scanner apparatus.

[Technical background of the invention and its problems]

For example, when reconstructing a tomographic image of the head using a CT scanner, place the patient on a bed and position the head so that the beam emitted from the X-ray tube passes perpendicularly to the body axis. must be set. At this time, for example, a patient whose neck is bent due to an accident, or whose entire body is bent, may be placed in a normal position on a bed and in good condition, the beam from the X-ray tube will 1ki may not be transmitted directly. In this case, moving the patient to set the position is a burden on the patient, and it is extremely difficult to finely adjust the position setting.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a radiation tomography bed device that can transmit a beam from an X-ray tube perpendicularly to the body axis without putting a burden on the patient. That is.

[Summary of the invention]

A summary of the present invention that achieves the above object is a radiation therapy system including a bed which is disposed oppositely above and below a passage hole for a patient and which allows a patient to be removably inserted into a pedestal having a built-in nine radiation tubes and a radiation detector. In the bed device for faults, one end is semi-fixed to a part of the pedestal, and it is attached so as to be able to rotate on the floor surface around the semi-fixed part, and the bed is placed on a nine-swivel board and a crease-swivel board. a rotating member that is pivoted on an axis perpendicular to the floor surface and reversibly rotates at a predetermined distance (from the semi-fixed part), and a rotating member that is provided on a part of the swivel base to rotate the rotating member; The apparatus is characterized in that it has a driving source for driving, and a tensioning member, one of which is locked to a part of the pedestal and the other of which is stretched along the side WJK of the rotating member.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIGS. 1(g) and 1(h) are a top view of the bed apparatus for radiation tomography, and in FIG.
A patient passage hole 1α is provided in the intermediate portion, and a nine-X tube 1b and an X-ray detector 1c are disposed oppositely above and below this patient passage hole 16. Further, on the base 2 of the pedestal 1,
Center lines 3 and 0 of the direction of X-ray radiation from the X@ tube 1k and the sliding direction of the top plate 1o (direction C in the figure)
A fulcrum shaft 4 is provided at the intersection, and a sprocket 5 is pivotally attached to the upper end of the fulcrum shaft 4. It is a 6FU swivel base,
For example, it has rotatable rollers 7 at the four corners, allowing it to move freely on the floor. Furthermore, a connecting plate 8 is identified on the side of the crisscrossing table 6 facing the pedestal 1, and a hole provided at the other end of the connecting plate 8 is loosely fitted into the fulcrum shaft 4. Rotating H
The stand 6Fi can swing freely around the fulcrum shaft 4.

9tj bed, the bottom surface of which is fixed to the swivel 6KWA, and a top plate 10 that is movable by Lx ride in the direction C shown in the figure so as to guide the patient 11 toward the patient passage hole 16 of the gantry 1. The rotation drive device for the swivel base 6 will be explained with reference to FIG. Pottery, in Figure 2, Figure 1 (-).

(A) The same members as those shown in K are given the same reference numerals and detailed explanation thereof will be omitted. In Figure 2, 5
is a sprocket fixed to the upper end of the fulcrum shaft 4. A reversible motor 12 is fixed on the connecting plate 8, and the motor shaft of the reversible motor 12 is connected to a gear shaft (not shown) in a reducer 14 via a coupling 13.

Although not shown, the speed reducer 14 has nine various gears, clutches, etc. set at appropriate speed reduction ratios, and the end of its output shaft is set opposite to the tin rocket 5. The numeral 16 on which the tin rocket 15 is pivoted is a chain, which is stretched endlessly between the sprocket 5 and the sprocket 15. Reference numeral 17 denotes a motor drive circuit, which is a ninth circuit that receives commands based on operation buttons or the like on an operation panel (not shown) and drives the motor 12 at a desired rotation speed and in a desired rotation direction. The operation of the apparatus constructed as described above will be explained with reference to FIG. 3 and 4. Figure 3 shows sprocket 150
It is a schematic explanatory view explaining an effect|action.

First, the swivel table 6 in FIG.
When the rotation angle and rotation direction are set by operating the operation button on the operation panel (not shown), the reversible motor 12 rotates, for example, in the forward direction. Power is transmitted to the reduction gear 14 via the coupling 13. The speed reducer 14Fi increases the torque of the rotational power using its own speed reduction ratio, and rotates in the direction 16a shown in the third figure. The sprocket attached to the fulcrum shaft 4 of this 1 base 2)
5F111 To avoid rotation, one of the chains 16 (
16a) in FIG. 3 receives a tensile force, and the other (16h in FIG. 3) receives a relaxing force. Therefore, the tooth 1 that engages the chain 16 on the sprocket 15
5g applies a tensile force P in the radial direction to each chain 16 that is locked, and the resultant force of the tensile force P acts to rotate the sprocket 15 in the direction of the arrow in the figure. At this time, the reducer 14 holding the tin rocket 15 is fixed to the connecting plate 8), and
One end of the connecting plate 8 is identified on the pace 2 on the pedestal 1 and is rotatably loosely fitted to the fulcrum shaft 4, so that the connecting plate 8 can rotate once in the direction shown in the figure about the fulcrum shaft 4. . Furthermore, the other end of the connecting plate 8 is connected to the swivel base 6, and the four corners of the swivel base 6 are provided with rollers 7 that rotate freely on the floor surface, so that they act on the connecting plate 8. When the rotational force overcomes the frictional force between the roller 7 of the swivel table 6 and the floor surface, the swivel table 6 rotates about the fulcrum shaft 4, and the bed 9 is rotated as shown in FIG. 1 (-). This means that you can make a turn in the A direction. #], the number of revolutions of the reversible motor 12 is
The bed 9 will turn by a predetermined angle determined by the motor drive enclosure 17 in response to the operation of an operation button on an operation panel (not shown). If the bed 9 is to be rotated in the direction of the arrow B shown in FIG. 1, the sprocket 15 may be rotated in the direction B shown in FIG.

As explained above, in the case where the X-rays from the KSX II tube 1h are not transmitted perpendicularly to the patient's body axis, it is possible to obtain a tomographic image perpendicular to the body axis without imposing any burden on the patient.

It goes without saying that the BAFi of the present invention is not limited to the above embodiments, and includes various modifications within the scope of the gist of the present invention. For example, the sprocket 5.15 and chain 16 in the above embodiment may be other members having the same function, and the sprocket 5, which is used to simply tension the chain 16 without requiring rotation, is not necessarily made of tin. At least 4 chains 16 without the need to use rockets
All you have to do is lock it. Also, the sprocket) 5Fi must be attached to the fulcrum shaft 4! ! 4, but may be at other positions on the base 2. Furthermore, in order to reduce the friction between the swivel base 6 and the floor during one turning movement, K is not limited to the roller 7, but may be another member, or a flat plate with low friction may be laid on the floor. I can do it with you.

Also, it is not necessary to use a reversible motor as the drive IIhIN of the tin rocket 15, and the sprocket 15 can be moved to the AI shown in the figure by changing the meshing of the gears of the reducer 14.

It can also be driven in the B1 direction.

〔Effect of the invention〕

As explained above, according to the present invention, when the radiation from the radiation tube does not directly pass through the body axis Kll of the subject due to the shape of the subject, the bed can be moved without imposing a burden on the patient, who is the subject. It is possible to provide a bed apparatus for radiation tomography that can obtain vertical tomographic images along the body axis when rotated. Moreover, since it has a simple configuration, it can be provided at low cost.

[Brief Description of the Drawings] Figure 1 ←), (j) #i% A top view and a front view of a bed for radiation tomography, which is an embodiment of the present invention, and Figure 2 show an example of a swing drive device. The schematic perspective view and FIG. 3 are schematic explanatory diagrams illustrating the function of the sprocket. 1... Frame, 16... Test hole, 1h...X
Ray tube, 1C...xII detector, 4... Fulcrum shaft, 5.
15... Sprocket, 6... Swivel base, 7... Roller, 8... Connecting plate, 12... Reversible motor, 14...
...Reduction gear, 16...Chain, 17...Motor drive circuit. Representative Patent Attorney Kensuke Chika (and 1 other person) -2';

Claims (1)

[Claims] In a radiation tomography bed apparatus including a bed on which a patient can be removably inserted into a pedestal which is disposed oppositely above and below a passage hole for the specimen and has a built-in nine radiation tube and a radiation detector, one end is made into a part of the pedestal. The bed is semi-fixed and can be rotated on the floor centering on the semi-fixed part, and the bed is placed on it. a rotating member that is pivoted on an axis perpendicular to the floor surface and rotates reversibly in a placed position; a drive source that is provided on a part of the swivel base and rotates the rotating member; and the other side of the (c) rotation member.