JPH0231743A - Bed device for ct apparatus - Google Patents

Abstract

PURPOSE:To reduce the load of an examinee by easily taking the tomographic image of an arbitrary cross section by providing an inclination imparting means for inclining a top plate. CONSTITUTION:In order to incline a top plate 3 within the flat vertical plane containing the body axis O of the examinee P placed on the top plate 3, the oil pressure applied to a hydraulic cylinder 8 is made constant and the oil pressure applied to a hydraulic cylinder 9 is reduced at the same time. By this method, a rod 9a is contracted and the top plate 3 is inclined. As mentioned above, since the hydraulic cylinders 8, 9 can be independently adjusted each other so as to extend and contract the rods thereof, the top plate 3 can be easily inclined at an arbitrary height at an arbitrary angle. By mounting this inclination imparting means, the tilt angle of a gantry can be adjusted and the tomographic image of an arbitrary cross section can be obtained and, therefore, diagnostic accuracy can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a CT apparatus bed device used in a CT apparatus such as an X-ray CT apparatus or a magnetic resonance imaging apparatus.

(Prior Art) As a conventional bed apparatus for a CT apparatus, there is one shown in FIG.

The CT apparatus bed device shown in the figure includes an upper frame 2 that supports a top plate 3 on which a subject is placed so as to be slidable in the direction of arrow B;
A lower frame 1 supports the upper frame 2 via a link 5, and the upper frame 2 supports the link 5 with a linear actuator 5.
a allows it to be raised and lowered in the vertical direction (in the six directions of arrows). Note that 4 in the figure indicates a state in which the upper frame 2 is raised.

(Problems to be Solved by the Invention) As described above, in the conventional CT apparatus bed device, the top plate 3
can only be moved in the six directions indicated by arrows in the figure or in the direction B. In particular, movement in the six directions of the arrows merely raises and lowers the upper frame 2 that supports the top plate 3 using a single linear actuator 5a, and it is not possible to obtain a tomographic image of the subject at a tilt angle of the gantry 11 of ■ or more. . Furthermore, since the top plate 3 can only be moved in the horizontal direction (direction of arrow B),
There is a drawback that it is necessary to perform coordinate movement processing to obtain the rotated tomographic image. Note that 11' in the figure shows a state in which the gantry 11 is not tilted.

For this reason, in the past, the subject placed on the top plate 3 was forced into an unreasonable posture, and there was a problem in that it was not possible to easily obtain a tomographic image of only 1q in an arbitrary cross section.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a bed apparatus for a CT apparatus that can easily capture a tomographic image of an arbitrary cross section and reduce the burden on a subject.

[Structure of the Invention] (Means for Solving the Problems) The structure of the present invention for achieving the above object is a CT that is equipped with a top plate on which the above-described subject is placed, and that can move the top plate up and down.
The apparatus bed device includes an inclination imparting means for inclining the top plate. In this case, the inclination imparting means may be one that tilts the top plate within a plane that includes the body axis of the subject placed on the top plate; The top plate may be tilted within orthogonal planes.

(Function) The function of the present invention having the above configuration is that the top plate is not only moved vertically and horizontally, but also tilted by the tilting means. This makes it possible to easily obtain tomographic images of arbitrary cross sections, and to reduce the burden on the subject.

(Example) The present invention will be described below with reference to the drawings. In this embodiment, the same components as those explained in FIG. 5 are given the same reference numerals, and the explanation thereof will be omitted, and the explanation will be given here focusing on the differences.

FIG. 1 (a> is a front view of a bed device for a CT apparatus as an embodiment, FIG. 1 (b) is a view taken along the line CC shown in FIG. 1 (a), and FIG. It is a HH arrow view shown in (a).

The difference between the CT apparatus bed apparatus shown in FIG. 1 and the conventional CT apparatus bed apparatus shown in FIG.

The inclination imparting means 8°9 shown in FIGS.
This allows the top plate 3 to be tilted.

Specifically, a hydraulic cylinder, for example, is used as the expansion adjustment means that can be expanded and contracted independently of each other.

These hydraulic cylinders 8 and 9 are connected to both ends 2 of the upper frame 2 and the lower frame 1.
a, 2b, 1a, and lb, and in this embodiment, one end 1 of the lower frame 1 is provided as shown in FIG. 1(a).
a (1b) and the other end 2b (2a) of the upper frame 2, respectively, and are arranged diagonally, and are moved by arrows E and 2b, respectively, by pressure supplied from a hydraulic source (not shown).
The rods 3a and 9a are adjusted to expand and contract independently in the D direction.

In this case, the open ends of the rods 3a, 9a and the upper frame 2 are each attached via a rotation shaft 6°7 rotatable in the direction of arrow G, and the cylinder body 8c.

9C and the lower frame 1 are attached via rotation shafts 8b and 9b that are rotatable in the direction of arrow F, respectively.

Therefore, the attitude of the upper frame 2 can be adjusted according to the expansion and contraction of the rods 8a and 9a.

By the way, in this embodiment, the above-mentioned inclination imparting means 8
, 9, in a plane perpendicular to the body axis O of the subject P placed on the top plate 3 as shown in FIG. 1(C).
It is provided with an inclination imparting means 14 for inclining.

Specifically, the illustrated inclination imparting means 14 is a gear 10 disposed within the upper frame 2. It has a rack 12 attached to the lower surface of the top plate 3 that meshes with the gear 10, and a drive source for the gear 10 (not shown).

The functions and effects of the bed device configured as described above will be explained with reference to FIGS. 2 to 4.

First, in FIG. 2, when hydraulic pressure is similarly applied to both hydraulic cylinders 8 and 9, the respective rods 8a.

9a extends similarly. Therefore, the upper frame 2 supporting the top plate 3
rises while remaining horizontal. On the other hand, when lowering the top plate 3, the hydraulic pressure applied to the cylinders 8 and 9 may be reduced at the same time. In the figure, 2' and 3' indicate the raised state.

Next, in order to tilt the top plate 3 within a plane (vertical plane) including the body axis O of the subject P placed on the top plate 3, the hydraulic pressure applied to the hydraulic cylinder 8 is kept constant; At the same time hydraulic cylinder 9
Reduce the hydraulic pressure applied to the This causes the rod 9a to contract and the top plate 3 to tilt. In this way, the hydraulic cylinder 8
, 9 can be adjusted to extend or contract independently of each other, so it can be adjusted to any desired height.
The top plate 3 can be easily tilted to any angle.

In the figure, 3'' and 9a' respectively indicate the states of the top plate 3 and the rod 9a after tilting.

By providing such a tilt imparting means, it is possible to obtain a tomographic image at an arbitrary cross section, that is, at an angle greater than or equal to the above-mentioned gantry tilt angle, thereby improving the accuracy of diagnosis.

Incidentally, in order to tilt the top plate 3 within a plane perpendicular to the body axis O of the subject P, the gear 10 is rotated, for example, counterclockwise as shown in FIG. 4.

As a result, the rack 12 is moved, and the top plate 3 to which the rack 12 is attached to the lower surface is tilted as shown.

Therefore, there is no need to perform coordinate movement processing when attempting to obtain a tomographic image of the subject P in a rotated state as in the conventional case, and the time required for imaging can be shortened.

According to the bed apparatus as one embodiment described in detail above, it is possible to easily take a tomographic image in an arbitrary cross section without forcing the subject P into an unreasonable posture. In this case as well, the subject P can be photographed without changing its posture, which can contribute to shortening the photographing time. In addition, when applied to an X-ray CT apparatus, it is possible to reduce X-ray exposure to the subject.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and that various modifications can be made within the scope of the invention.

[Effects of the Invention] According to the present invention described in detail above, it is possible to easily take a tomographic image of an arbitrary cross section, and to reduce the burden on the subject.
We can provide a bed device for equipment.

[Brief explanation of the drawing]

FIG. 1(a) is a front view of a bed device for a CT apparatus as an embodiment of the present invention, FIG. 1(b) is a view taken along the line C-C, and FIG. 2 to 4 are explanatory views of the operation of the CT apparatus bed apparatus shown in FIG. 1, and FIG. 5 is an explanatory view of the conventional CT apparatus bed apparatus. 3...Top plate, 8,9,14...Inclination imparting means,
P: Subject, O: Body axis. Agent Patent Attorney Norihiro Konshu Kanshu Takeshi Kondo

Claims (5)

[Claims] (1) A bed for a CT apparatus, which includes a top plate on which a subject is placed and is capable of raising and lowering the top plate, characterized in that the bed for a CT apparatus is provided with inclination imparting means for tilting the top plate. Device. (2) The bed apparatus for a CT apparatus according to claim 1, wherein the tilting means tilts the top plate within a plane including the body axis of the subject placed on the top plate. (3) The bed apparatus for a CT apparatus according to claim 1, wherein the tilting means tilts the top plate within a plane perpendicular to the body axis of the subject placed on the top plate. (4) The bed device for a CT apparatus according to claim 1 or 2, wherein the inclination imparting means includes a telescopic adjusting means that can be telescopically adjusted independently of each other. (5) The bed apparatus for a CT apparatus according to claim 1, wherein the inclination imparting means comprises a gear mechanism.