JPH021497B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an X-ray fluoroscopic imaging apparatus, and particularly to an undertable type X-ray fluoroscopic imaging apparatus.

This type of X-ray fluoroscopic imaging apparatus will be explained with reference to FIGS. 1 and 2, which show the X-ray fluoroscopic imaging apparatus of the present invention. an X-ray tube device 3 disposed inside the table 2 (located below the table surface), a support frame 7 integrally protruding from the top surface of the table 2, and a support frame 7 with the table surface sandwiched between the support frames 7. It includes an image intensifier 6 and a snapshot device 5 disposed facing the X-ray tube device 3, and a compression tube 9 integrally provided with the snapshot device so as to be rotatable in a plane parallel to the table surface. The operation will be explained below. An X-ray fluoroscopic image of the subject 4 on the table 2 using the X-rays from the X-ray tube device 3 is observed by the image intensifier 6, and directly photographed by the snapshot device 5 as appropriate. At this time, the compression tube 9 is positioned from the retracted position b to the compression position a on the lower surface of the rapid imaging device 5, and the compression tube 9 is configured to appropriately compress the diagnostic organ to obtain a good X-ray image. There is.

However, in the conventional X-ray fluoroscopic imaging device described above, since the compression tube 9 is integrally provided with the quick-shooting device 5, there is no problem as mentioned above in normal direct imaging, but in the case of enlarged imaging. There's a problem. That is, in enlarged imaging, the subject 4
The distance from the photographic device 5 is increased to enlarge the diagnostic organ and photograph it on film. A problem arises in that it cannot be compressed and a good X-ray image cannot be obtained.

The present invention aims to provide an X-ray fluoroscopic imaging apparatus that solves the above-mentioned problems. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the X-ray fluoroscopic imaging apparatus of the present invention will be described below with reference to the accompanying drawings.

Note that since the reference numerals 1 to 7 and 9 in the figure have been explained above, their explanations will be omitted here.

Therefore, the X-ray fluoroscopic imaging apparatus of the present invention in this embodiment has two guide rails 7 on the support frame 7.
A is laid in a direction perpendicular to the table surface, and the guide rollers 5a provided at both ends of the snapshot device 5 are engaged with the guide rail 7a, and one of the two guide rails 7a is A balance weight 12 having the same weight as the snapshot device 5 is mounted so as to be movable back and forth by a guide roller 12a. This snapshot device 5 and the balance weight 12 are connected by a wire rope 11, and a sheave 10 is attached to the top and bottom of the support frame 7 with this wire rope 11.
to engage. A first feed screw 13 is provided on the support frame 7 rotatably by a bearing 13a and in a direction perpendicular to the table surface, while a first nut 13c is integrally provided on the quick copying device 5, and this first nut 13c
is screwed onto the first feed screw 13. The first feed screw 1
3, the first driven V sheave 13b is fixed to the lower end of the support frame 7, and the first motor 15 is mounted on the support frame 7.
A first drive V sheave 15a and a second drive V sheave 15b are fixed to the output shaft of the motor 15, and the first
Drive V sheave 15a and the first driven V sheave 13
Wrap the first V belt 14 around b.

A guide pipe 8 is fixed to the side of the support frame 7, and an inverted L-shaped guide groove 8a is formed in the guide pipe 8.
is provided, and the compression cylinder 9 can rotate between the retracted position b and the compression position a in a plane parallel to the table surface at the upper part of the guide pipe 8, and reciprocate in the direction perpendicular to the table surface in the compression position a. Configure it so that you can. A second feed screw 17 is provided in the guide pipe 8 so as to be rotatable by a bearing 17b and perpendicular to the table surface. On the other hand, the compression tube 9
A second nut 19 is fixed to the base end of a support arm 20 that is integrally provided at the tip, and this second nut 19 is screwed onto the second feed screw 17, and a roller 20a is attached to the middle part of the support arm 20. This roller 2 is attached rotatably.
0a is engaged with the guide groove 8a of the guide pipe 8. A second driven V sheave 17a is fixed to the lower end of the second feed screw 17 via a first electromagnetic clutch 18, and the second driven V sheave 17a and the first motor 1
A second V-belt 16 is wrapped around a second driving V-sheave 15b fixed to the output shaft of the second V-sheave 15b. Meanwhile, the upper end of the second feed screw 17 is connected to a second motor 22 through a second electromagnetic clutch 21 .

A first power transmission means for reciprocating the snapshot device 5 (i.e., a first feed screw 13, a first nut 1
3c, first driven V-sheave 13b, first driving V-sheave 15a) and a second power transmission means for reciprocating the compression tube 9 (i.e., second feed screw 17, second nut 19, second driven V-sheave 17a) , second drive V
The acceleration/deceleration ratio and the like with the sheave 15b) are made the same, and the photographing device 5 and the compression tube 9 are configured to be able to reciprocate at the same speed by the first motor 15.

The X-ray fluoroscopic imaging apparatus of the present invention in this embodiment has the above configuration, and its operation will be explained below.

When performing normal direct photography, first
is positioned above, and the first electromagnetic clutch 18
on the other hand, connect the second electromagnetic clutch 21, and connect the second electromagnetic clutch 21.
The motor 22 is driven. Then, the second motor 2
The rotational force of 2 is transmitted to the second nut 19 via the second electromagnetic clutch 21 and the second feed screw 17, and the compression tube 9 located at the retracted position b rotates along the guide groove 8a to the photographing position a. To position. Therefore, the second motor 22 is stopped and the second electromagnetic clutch 2
1, and then the first motor 15 is driven to position the snapshot device 5 above the compression tube 9. And the first
By connecting the electromagnetic clutch 18 and driving the first motor 15, the compression cylinder 9 is reciprocated along the guide groove 8a of the guide pipe 8 together with the copying device 5, that is, at the same speed as the reciprocating speed of the copying device 5. and can put pressure on the diagnostic organ.

When performing enlarged photography, the first electromagnetic clutch 18
By turning off, the edge between the first motor 15 and the compression tube 9 can be cut, and the first motor 15 is driven to move only the quick-shooting device 5 upward to remove the subject 4.
You can increase the distance between you and On the other hand, the second
By connecting the electromagnetic clutch 21 and driving the second motor 22, the compression cylinder 9 moves back and forth independently of the photographic device 5, compressing the diagnostic organ even if the photographic device 5 is far away from the subject 4. be able to. Therefore, even in magnified imaging, the diagnostic organ can be compressed and a good X-ray image can be obtained.

As is clear from the above embodiments, the X-ray fluoroscopic imaging apparatus of the present invention has a first
Since the compression means is connected to the drive part via the first disconnection means, and the compression means is connected to the second drive part through the second disconnection means, the second disconnection means is turned off and the first disconnection means is connected to the compression means. By connecting, the compression means can be moved back and forth together with the snapshot device, and normal direct photography can be performed. In addition, by turning off the first intermittent means and connecting the second intermittent means, the compression means can be moved back and forth independently from the photographic device, and even if the photographic device is far away from the subject, the compression tube can be used for diagnosis. It has the effect of compressing organs and allowing enlarged images to be taken.

[Brief explanation of drawings]

The accompanying drawings show an embodiment of the X-ray fluoroscopic imaging apparatus of the present invention, in which FIG. 1 is a front view, FIG. 2 is a plan view,
FIG. 3 is a sectional view of the main parts, FIG. 4 is a sectional view taken along the line A--A in FIG. 3, and FIG. 5 is a perspective view of the guide pipe and compression tube. DESCRIPTION OF SYMBOLS 1...Support stand, 2...Table, 3...X-ray tube device, 4...Subject, 5...Snapshot device, 6...Image intensifier, 7...Support frame, 8...
... Guide pipe, 8a ... Guide groove, 9 ... Compression cylinder, 13 ... First feed screw, 13b ... First driven V
Sheev, 13c...1st Natsuto, 14...1st V
Belt, 15...First motor, 15a...First drive V sheave, 15b...Second drive V sheave, 16
...Second V belt, 17...Second feed screw, 17a
...Second driven V sheave, 18...First electromagnetic clutch, 19...Second nut, 20...Support arm, 20
a...Roller, 21...Second electromagnetic clutch, 22
...Second motor.

Claims (1)

[Claims] 1 A table tiltably attached to a support base, an X-ray tube device disposed on the underside of the table, and an image injector disposed above the table facing the X-ray tube device across the table surface. In an X-ray fluoroscopic imaging apparatus equipped with a tensifier and a quick-transmission device, the quick-shot device is mounted on the support frame of the table so as to be movable back and forth in a direction perpendicular to the table surface, and the quick-shot device is connected to a first power transmission means. The abdominal pressure means is connected to the first drive section through the support frame and is mounted on the support frame so as to be reciprocated in a direction perpendicular to the table surface, and the abdominal pressure means is connected to the second power transmission means and the first drive section.
The intra-abdominal pressure means is connected to the second drive section via the second power transmission means and the second disconnection means, and the second disconnection means is turned off. By connecting the intermittent means, the abdominal pressure means can be linked with the snapshot device, and by cutting off the first intermittent means and connecting the second intermittent means, the abdominal pressure means can be moved back and forth independently of the snapshot device. An X-ray fluoroscopic imaging device characterized by: