JPH0543380B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a CT system equipped with a tilt mechanism that tilts a mount in order to perform tomography at various angles with respect to the body axis of a subject. The present invention relates to a gantry device, and particularly to improvements in the tilt mechanism and gantry housing structure.

(Prior Art) Currently, X-ray CT apparatuses equipped with a tilt mechanism are in practical use.

This tilt mechanism is used to image a subject inserted into the imaging space formed on the pedestal in a plane perpendicular to the subject's body axis with the pedestal in an upright position. By tilting it to the side, tomography images can be taken at various angles with respect to the subject's body axis.

As this tilt mechanism, a mechanism as shown in FIG. 4 is used. In this mechanism, a stand 3 that is raised from a base component 1
, while the lower end is pivoted, the gantry bottom component 1
Telescopic power cylinder 5 that can be launched from
and a rotating member 7 which is disposed in the depth direction of the frame and has the upper end of the power cylinder 5 attached to one end and the stand 3 attached to the other end, and this rotating member 7. A tilting frame 9 is fixed to the end portion of the side on which the power cylinder 5 is pivoted, and is tilted by the rotation of the rotation member 7.

In this tilt mechanism, as shown in FIGS. 4a and 4b, the tilting frame 9 is rotated to the right or to the left in the paper of FIG. tilt in the direction. And, due to this tilting,
A pedestal cover 11 fixed to the tilting frame 9
In addition, each member provided within the gantry cover 11 also tilts.

With such arrangement of each member, when the tilting frame 9 is tilted to the right or left, the lower part of the pedestal cover 11 is vertically raised from the pedestal bottom component 1. This results in collision with the power cylinder 5 or the lower part of the stand 3.

For this reason, a configuration is adopted in which the flappers 13a and 13b are connected to the pedestal cover 11 and the lower part thereof by hinges 15a and 15b. Collision with the power cylinder 5 is avoided, and the stand 3 or the power cylinder 5 is surrounded by flaps 13a, 13b.

(Problem to be Solved by the Invention) However, in order to provide the flappers 13a and 13b on the pedestal cover 11, when manufacturing the pedestal cover 11, it is necessary to mold a flat part with a predetermined portion removed or to remove a predetermined portion. It takes a lot of man-hours to attach the flappers 13a, 13b formed in another process, and the cost involved cannot be ignored.

The present invention has been made in consideration of the problems of the prior art, and an object of the present invention is to provide a CT mount device that can omit the flapper and reduce the manufacturing cost of the mount cover.

[Structure of the Invention] (Means for Solving the Problems) In order to perform tomography at various angles with respect to the body axis of a subject, a tilt mechanism is provided to tilt a pedestal that supports an X-ray tube and a detector. , in a CT mount device further equipped with a cover that covers the mount,
A stand that is tilted toward the front or rear side of the gantry with its base at the position of the gantry bottom component that is approximately at the center in the depth direction of the cover, and a stand that is arranged on the same plane as the stand and a rotating member having one end axially connected to the upper part of the stand and the other end disposed in the depth direction of the pedestal on the opposite side to the substantially central portion; and one end axially connecting to the other end of the rotating member and the other end. a telescoping means that is axially connected to the vicinity of the base of the stand to apply a telescoping force to the rotating member, and a tilting frame fixed to the rotating member, at least the stand, the rotating member, and the rotating member. The present invention is characterized in that the telescopic means and the pedestal including the tilting frame are covered with the cover.

(Function) According to the above-described configuration, the following effects are achieved. That is, by tilting and standing up the stand or the power cylinder from the bottom component of the gantry toward the opposite side of the tilting frame or towards the tilting frame, in other words, the space occupied by the gantry cover below the stand or the gantry cover below the power cylinder is raised. By reducing the space occupied by the stand side or the power cylinder side, even if the stand cover is flat and does not have a flap, when the tilting frame is tilted in the upward or downward direction, the space under the stand cover on the stand side or power cylinder side can be reduced. Since the side portions do not collide with the stand or the lower portion of the power cylinder, the flapper can be omitted and the manufacturing cost of the pedestal cover can be reduced.

(Example) Hereinafter, an example of the CT mount device according to the present invention will be described with reference to FIGS. 1 and 3.

CT mount device according to the present invention, for example, X-ray CT
In FIG. 1 showing an example of a mount device for
Inside this gantry device, an X-ray tube 21 and a detector 23 are disposed facing each other with an imaging space (not shown) in between. The X-ray tube 21 is configured to rotate about a center assumed in the imaging space and emit X-rays in a fan shape toward a detector 23 which also rotates about the center. .
The signal obtained by the detector 23 is then amplified and integrated.
Processing such as digital conversion and image reconstruction is performed, and the content of the processing results is displayed as an image on a monitor such as a CRT (not shown).

The X-ray CT and its gantry having such a configuration are equipped with a tilt mechanism in order to perform tomography at various angles with respect to an opposite axis of a subject (not shown).

This tilt mechanism includes a gantry bottom component 1 having the same functions as the components shown in FIG. A front cover 11a, a back cover 11b, etc., which constitute the main body are used.

In this frame device, the stand 3
is tilted and raised toward the side opposite to the tilting frame 9 with the position of the gantry bottom component member 1, which is approximately the center in the depth direction of the gantry cover 11, as a base, and an elastic force is applied to the rotating member. The power cylinder 5 serving as a telescoping means is tilted upward from near the base of the stand 3 toward the tilting frame 9.

That is, as shown in FIG. 2, the stand 3 and the power cylinder 5 are arranged so as to be released upward from each other, and furthermore, the power cylinder 5 is arranged such that the extendable part is on the lower side. It is mounted upside down, and a motor 25 for telescopic driving is attached to the upper end, and its lower end is mounted upright from the base component 1 through an opening 27 provided in the side of the stand 3 on the tilting frame 9 side. It's been raised.

In addition, the stand 3, the rotating member 7, and the cylinder 5
are disposed on the same plane at both ends, and these 3, 7, and 5 are covered with covers 11a and 11b.

In this way, the stand 3 is attached to the gantry bottom component 1.
By tilting and standing up the tilting frame 9 to the opposite side, the occupied space on the front cover 11a side below the stand 3 is reduced. When tilting, the lower part of the front cover 11a on the side of the stand 3 will not collide with the lower part of the stand 3 even if a flapper or the like is not provided. Similarly, by tilting and raising the power cylinder 5 from the gantry bottom component 1 toward the tilting frame 9 side, the space occupied below the power cylinder 5 on the rear cover 11b side is reduced. As shown in FIG. 2, when the tilting frame 9 is tilted in the downward direction, the lower part of the back cover 11b on the power cylinder 5 side collides with the lower part of the power cylinder 5 even if a flap or the like is not provided. There is no need to put it away.

With such a structure, the flapper can be omitted, and by omitting the flapper, the manufacturing cost of the pedestal cover 11 can be reduced by providing the pedestal device with the flapper, and furthermore, the reliability of the device can be improved by reducing the number of parts. In addition, the pedestal cover can be made to have a sleek appearance and design.

Furthermore, a stand 3, a rotating member 7 and a cylinder 5
Since the tilting devices such as the one shown in FIG.

[Effects of the Invention] As explained in detail above, the present invention has
In a CT mount device, by tilting and standing up the stand or the power cylinder from the bottom component of the mount toward the opposite side of the tilting frame or toward the tilting frame, in other words, the space occupied by the mount cover below the stand or the power cylinder can be raised. By reducing the space occupied by the lower pedestal cover side, even with a flat pedestal cover without flaps, when the tilting frame is tilted in the upward or downward direction, the space on the stand side or power cylinder side is reduced. Since the lower part of the pedestal cover does not collide with the lower part of the stand or the power cylinder, the flapper can be omitted and the manufacturing cost of the pedestal cover can be reduced.

Further, since the stand and the rotating member are housed inside the cover, the lateral dimension can be reduced, and the overall size of the device can be reduced.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the main part configuration of an embodiment of a CT mount device according to the present invention, FIG. 2 is a perspective schematic external view of an embodiment of the stand and power cylinder in a standing state, and FIG. 3 FIGS. 4a and 4b are sectional views of essential parts for explaining the operating state of the tilt mechanism in the gantry shown in FIG. 1, and FIGS. 4a and 4b are sectional views of essential parts of the conventional gantry. 1... Frame bottom component, 3... Stand, 5
... Power cylinder, 7 ... Rotating member, 9 ... Tilting frame, 11a, 11b ... Frame cover, 2
1...X-ray tube, 23...detector.

Claims (1)

[Claims] 1. A CT stand that is equipped with a tilt mechanism that tilts the stand that supports the X-ray tube and the detector, and further equipped with a cover that covers the stand, in order to perform tomography at various angles with respect to the body axis of the subject. In the device,
A stand that is tilted toward the front or rear side of the gantry with its base at the position of the gantry bottom component that is approximately at the center in the depth direction of the cover, and a stand that is arranged on the same plane as the stand and a rotating member having one end axially connected to the upper part of the stand and the other end disposed in the depth direction of the pedestal on the opposite side to the substantially central portion; and one end axially connecting to the other end of the rotating member and the other end. a telescoping means that is axially connected to the vicinity of the base of the stand to apply a telescoping force to the rotary member, and a tilting frame fixed to the rotary member, at least the stand, the rotary member, and the retractable member. and a pedestal including the tilting frame is covered with the cover.
mount device.