JPH084006Y2 - MRI equipment - Google Patents

Description

[Detailed description of the device]

[0001]

[Field of Industrial Application] This invention is applied to nuclear magnetic resonance (NM).
R) for obtaining a tomographic image of the human body (Mag
(net Resonance Imaging),
In particular, the present invention relates to a bed device for inserting and moving a subject in an imaging space of a gantry.

[0002]

2. Description of the Related Art An MRI apparatus comprises a gantry G and a bed apparatus B'as shown in FIG. Gantry G
For example strong, static magnetic field generating source 1 consisting of the cryostat 1 ₂ to accommodate them superconducting coil 1 ₁ to create a uniform static magnetic field, static magnetic field generating source having a shim coil (not shown) for correcting the inhomogeneities of the static magnetic field 1. A gradient magnetic field coil support portion for accommodating a gradient magnetic field coil 3 in the X, Y, Z3 directions, which is arranged near the inner peripheral surface of 1 via a gradient magnetic field coil support portion 2, a guide 4 for guiding and supporting a bed described later, An imaging space 1a inside the gantry 1 is formed at a position closest to the inner side of 2.

In the gantry imaging space 1a, a high frequency pulse (RF pulse) is transmitted to a patient (subject) M and an FID signal (Free Induction Dec).
The RF coil 5 for detecting (ay: free induction attenuation) is set. The bed device B ′ is provided with a top plate 1 on which the patient M is supine.
1 and a top plate supporting portion 1 for slidably supporting the top plate 11.
2 and a base portion 13 provided on the floor surface for fixedly supporting the top support portion 12, and the base portion 13 accommodates a bed drive mechanism (not shown) for sliding the top plate 11.

In order to set the patient M at the scan position P, the top plate 11 supporting the patient M is moved along its longitudinal direction and inserted into the gantry imaging space 1a, and the scan position P is set.
Move to. At this time, the rolling wheels 14 provided at the tip of the top plate 11 are supported on the guides 4 in the imaging space 1a of the gantry G to ensure the smooth movement of the top plate 11 in the gantry imaging space 1a.

The figure shows a state in which the top 11 is inserted into the imaging space 1a and the patient M is positioned at the scan position P.

[0006]

As described above, the patient M is set at the scan position P by moving the top 11. Since the depth of the gantry G is as long as 2 m or more, a long top plate stroke is required, resulting in MR
As a bed device of the I device, the depth inevitably becomes long,
Requires a large installation space.

In view of the above, it is an object of the present invention to provide an MRI apparatus in which a bed apparatus is incorporated in a gantry, the installation space of the MRI apparatus can be reduced, and the configuration is simple.

[0008]

In order to achieve the above object, the present invention is characterized in that a top plate is incorporated in a gantry so that it can be inserted into and removed from a photographing space in the gantry.

[0009]

According to the above construction, since the bed apparatus is incorporated in the gantry, even if the depth of the gantry is long and the top plate having a long stroke length is required, the photographing, that is, the scan position of the subject is scanned. Only when set to, the top plate should be pulled out from the gantry shooting space by the required length. Therefore, it is not necessary to install the bed apparatus separately from the gantry, so that the installation space of the MRI apparatus can be made as small as possible, and the effective use of the installation room can be achieved. Moreover, since the installation work of the bed apparatus is not required, the MRI apparatus can be easily installed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG. It should be noted that components having the same functions as those in FIG. B is a bed device which is a main part of the present invention. Reference numeral 6 denotes a top plate for supineing the patient M, which is supported on a guide 4 in the gantry via a rolling wheel 7 attached to the lower part on the front side thereof, and a top plate leg attached to the lower surface on the rear side. It is supported on the floor surface 10 via wheels 9 at the lower end of 8. The top plate 6 moves along the longitudinal direction thereof and is inserted into and removed from the gantry imaging space 1a together with the patient M.

Therefore, the top plate 6 is not supported by the base portion installed on the floor surface for accommodating the bed drive mechanism provided on the floor surface as in the conventional example, and is structurally simple and simple for the patient M. It is easy to transfer.

Next, the operation will be described. At the time of photographing, the top plate 6 located in the photographing space 1a indicated by the chain double-dashed line is pulled out and moved as indicated by the solid line. At this time, the rolling wheels 7 on the front side of the top plate 6 roll on the guides 4 in the gantry G, and the wheels 9 roll on the floor surface 10, so that the moving operation thereof can be performed easily. In this state, the patient M lies on the top 6.
The operator pushes the top plate 6 and moves it along the longitudinal direction thereof to insert the patient M together with the top plate 6 into the gantry imaging space 1a, and set the patient M at the scan position P.

At this time, since the moving operation can be smoothly performed by the action of the rolling wheels 7 and the wheels 9 on the front end of the top plate 6, the setting can be accurately performed. The chain double-dashed line indicates the position of the top plate 6 when the setting is completed. The setting position is adjusted by the amount of insertion of the top plate 6 into the imaging space 1a of the gantry G.

[0014]

[Effect] According to this invention, the top plate is incorporated in the gantry so that it can be inserted into and removed from the imaging space of the gantry. Therefore, the subject can be placed in the imaging space of the gantry without installing a bed apparatus in parallel with the gantry. It can be inserted and moved, and the installation space of the MRI apparatus can be reduced. Further, since the bed apparatus need not be installed on the floor surface, the MRI apparatus can be installed easily. Further, since the top plate can be housed in the imaging space of the gantry except when photographing, the photographing room in which the MRI apparatus is installed can be effectively used.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a vertical sectional side view showing a conventional MRI apparatus.

[Explanation of symbols]

G ... Gantry B ... Sleeper device 1a ...
Shooting space 4 ... Guide 6 ... Top plate 7 ... Rolling wheel 8 ... Top plate leg 9 ... Wheel

Claims (1)

[Scope of utility model registration request] 1. An MRI apparatus characterized in that a top plate is incorporated in a gantry forming an imaging space so as to be insertable into and removable from the imaging space.