JP2003047604A - Fluorography - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluorography capable of keeping constant the distance between a focal point of an X-ray source and the film surface of a Bucky table. SOLUTION: This fluorography is provided with an X-ray tube 11 for applying X-rays to an object, a support mechanism for supporting the X-ray tube to be freely elevated, the Bucky table 20 disposed opposite to the X-ray tube 11, and a connecting mechanism 40 for elevating the X-ray tube 11 interlocking with elevation of the Bucky table 20.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an X-ray imaging system. Especially for lifting and lowering the bucky table and X
The present invention relates to an X-ray imaging system that can be linked with the elevation of a radiation source.

[0002]

2. Description of the Related Art Conventionally, a floor traveling type X-ray tube supporting device has been used,
A popular X-ray imaging system including a lifting bucky table and a bucky stand is known. The floor-traveling X-ray tube support device includes a support mechanism that vertically supports an X-ray tube that is an X-ray source, and a slide mechanism that horizontally slides the support mechanism itself. Further, the lifting type bucky table is arranged below the X-ray tube so as to be able to move up and down. The bucky stand supports the bucky part so that it can be raised and lowered. Such an X-ray imaging system is mainly used for general surgery imaging and chest imaging.

When performing general surgical imaging, the subject is placed on a bucky table and imaging is performed. At that time, the distance between the focus of the X-ray tube and the film surface of the bucky is made constant by raising and lowering the Bucky table and raising and lowering the X-ray tube.

On the other hand, in the case of photographing with a bucky stand, the bucky part is moved up and down according to the height of the subject, and the X-ray tube is moved up and down corresponding to the focus of the X-ray tube and the film center of the bucky part. To match.

Normally, the raising and lowering of these X-ray tubes is manually performed each time.

In addition, a position detecting mechanism is incorporated in a bucky table or bucky stand, and a displacement mechanism of a table surface or a bucky part is detected, and an X-ray tube is electrically moved up and down in accordance with the displacement amount to provide an electric mechanism. There is also.

[0007]

[Problems to be Solved by the Invention] However, manual X
Adjustment of the position of the wire tube is time-consuming and burdens the operator.

On the other hand, in the case of using the electric mechanism, the burden on the operator is reduced, but an X-ray tube supporting mechanism and an elevating bucky table require an independent electric elevating mechanism.
Their position detection mechanism is also required. Therefore, there is a problem that the mechanism is complicated and expensive.

Therefore, the main object of the present invention is to provide an X-ray imaging system capable of maintaining a constant distance between the focal point of the X-ray source and the film surface of the bucky table with a simple mechanism.

Another object of the present invention is to provide an X-ray imaging system which can easily align the focal point of the X-ray source and the film center of the bucky stand.

[0011]

SUMMARY OF THE INVENTION The present invention achieves the above object by connecting an elevating mechanism for an X-ray source and a bucky table, and interlocking the X-ray source and the bucky table.

That is, the X-ray imaging system of the present invention comprises an X-ray source for irradiating a subject with X-rays, a support mechanism for vertically supporting the X-ray source, and a bucky arranged to face the X-ray source. X in conjunction with the lifting of the table and bucky table
And a coupling mechanism for moving the radiation source up and down.

In this way, by connecting the bucky table and the X-ray source, X
The radiation source can be moved up and down, and the distance between the focal point of the X-ray source and the film surface of the bucky table can be easily kept constant.

The X-ray source support mechanism is usually configured to be slidable in the horizontal direction as well, and the coupling mechanism itself may be configured to slide along the bucky table as the support mechanism slides in the horizontal direction. It is suitable.

Further, a bucky stand that supports the bucky part so that it can be lifted and lowered, a position detection mechanism that detects the lifted position of the bucky part, and a bucky table that is moved up and down based on the detection result of the position detection mechanism. It is preferable to have a drive mechanism for interlocking the X-ray source and aligning the Bucky section and the X-ray source.

With this configuration, the focus of the X-ray source and the film center of the bucky stand can be easily aligned without using an electric lifting mechanism for the X-ray source support mechanism.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the X-ray imaging system of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic front view of the X-ray imaging system of the present invention, and FIG. 2 is a schematic side view thereof.

This system comprises a floor traveling type X-ray tube supporting device 1
0, liftable bucky table 20 and bucky stand 3
Contains 0 and.

The floor traveling type X-ray tube supporting device 10 serves as an X-ray source.
An X-ray tube 11 and a support mechanism for supporting the X-ray tube 11 so as to be able to move up and down are provided. The support mechanism includes a pillar 12 slidably held at one end on the ceiling 50 and the other end at the floor 60, and the pillar 12.
A slider (13) vertically slid along the arm (13) and an arm (14) extending from the slider (13) and having an X-ray tube (11) attached to the tip thereof. With this support mechanism, the column 12 can be slid horizontally (direction of arrow A) and the slider 13 can be slid vertically (direction of arrow B).

Sheaves 15 and 16 are installed at the upper and lower ends of the column 12, respectively, and the wire rope is provided between these sheaves.
17 has been passed over. When the slider 13 is fixed to the wire rope 17 and the X-ray tube 11 is moved up and down, the wire rope 1
7 runs and slider 13 slides along the column.

Further, the X-ray tube 11 can be rotated from the downward X-ray irradiation direction to the horizontal X-ray irradiation direction. This rotation irradiates X-rays to the bucky stand side and uses it for chest imaging.

On the other hand, the liftable bucky table 20 is supported by a vertical movement frame 21 and moves up and down (direction of arrow D).
It has 2. A cassette is installed below the table surface 22, and a film is set in the cassette. The vertical movement frame 21 is configured to be movable up and down by an electric drive mechanism, and the table surface 22 can be moved up and down in order to move to a position where it is easy for a subject to get on and off and to be photographed.

Here, the vertical moving frame 21 of the bucky table and
The support mechanism of the X-ray tube 11 is connected by the connection mechanism 40. The coupling mechanism 40 is a rod-shaped body, one end of which is fixed to the wire rope 17 of the support mechanism via the joint 41, and the other end of which is attached to the vertical moving frame 21 of the bucky table. The joint 41 is provided at a position such that the X-ray tube focal point and the film surface of the bucky table have a distance suitable for photographing. The connecting mechanism 40 and the vertical moving frame 21 are attached via the guide rail 42 so that the connecting mechanism 40 can be slid horizontally with respect to the vertical moving frame 21. Thereby, when the support column 12 is slid in the horizontal direction, the connecting mechanism 40 is also slid in synchronization. Then, when the table surface 22 is moved up and down, the wire rope 17 also travels in the up and down direction via the connecting mechanism 40. Along with this, the slider 13 also moves up and down, and the X-ray tube 11 moves up and down in conjunction with each other, so that the distance between the X-ray tube focus installed on the bucky table 20 and the film surface can be kept constant.

Further, the bucky stand 30 comprises a bucky part 31 on which a cassette is arranged and a column 32 which supports the bucky part so that it can be raised and lowered (in the direction of arrow E). here,
The bucky stand 30 is provided with a position detection mechanism for detecting the vertical position of the bucky portion 31, and the bucky table is provided with a position detection mechanism for detecting the vertical position of the table surface. The position detection mechanism may be any mechanism as long as it can detect the vertical position of the bucky part or the table surface.

The detection result of the position detection mechanism is transmitted to the drive mechanism of the bucky table 20 as position data. Then, the drive mechanism is operated according to the transmitted position data to move the table surface 22 up and down to move the X-ray tube 11 up and down. Then, the focal point of the X-ray tube 11 and the film center of the bucky stand 30 are aligned.

[0026]

As described above, according to the system of the present invention, by mechanically connecting the X-ray source support mechanism and the bucky table, the X-ray source is moved up and down in conjunction with the vertical movement of the table surface. The distance between the focal point of the X-ray source and the film surface of the bucky table can be kept constant by moving the X-ray source.

Further, the focus position of the X-ray source and the film center of the bucky stand can be easily aligned by detecting the vertical position of the bucky part of the bucky stand and raising and lowering the bucky table based on the detection result. You can In that case, it is not necessary to use an electric lifting mechanism for the support mechanism of the X-ray source, and the system can have a simple configuration.

[Brief description of drawings]

FIG. 1 is a schematic front view of an X-ray imaging system of the present invention.

FIG. 2 is a schematic side view of the X-ray imaging system of the present invention.

[Explanation of symbols]

10 X-ray tube support device 11 X-ray tube 12 columns 13 Slider 14 arms 15, 16 sheaves 17 wire rope 20 bucky table 21 Vertical movement frame 22 table surface 30 bucky stand 31 Bucky section 32 columns 40 connection mechanism 41 fittings 42 Guide rail 50 ceiling 60 floors

Claims (2)

[Claims] 1. An X-ray source that irradiates an object with X-rays, a support mechanism that supports the X-ray source so that the X-ray source can move up and down, a bucky table that faces the X-ray source, and a bucky table that moves up and down. An X-ray imaging system characterized by comprising a connecting mechanism for moving the X-ray source up and down in conjunction with each other. 2. A bucky stand that supports the bucky part so that the bucky part can move up and down, a position detection mechanism that detects an up-and-down position of the bucky part, and a bucky table that moves up and down based on the detection result of the position detection mechanism. 2. The X-ray imaging system according to claim 1, further comprising a drive mechanism for interlocking the X-ray source and aligning the bucky part and the X-ray source.