JPH0545072Y2 - - Google Patents

Description

[Detailed explanation of the invention] (1) Industrial application field This invention is applicable to MRI (magnetic resonance imaging) equipment, especially the high-frequency coil and gantry (device main body).
The present invention relates to a cable processing mechanism for connecting a signal processing device installed in a cable.

(2) Prior art As shown in Fig. 4, an MRI apparatus has a main body (gantry) 1 having an opening 7 into which a subject 4 is inserted.
and a bed 2 that has a top plate 3 that supports the subject 4 and moves it left and right and up and down in the figure, and inside the gantry 1 there are magnets for generating static magnetic fields, gradient coils, etc. (not shown). It is accommodated.

When imaging with an MRI device, the imaging area is placed at the imaging position 8 in the gantry 1. For example, when imaging the head, the head is placed at the imaging position 8 as shown in FIG.
At the same time, it is necessary to install the high-frequency coil 5 for the head at the head position on the top plate 3.

Using a normal conducting magnet as a magnet for generating a static magnetic field
Since the depth dimension l of MRI equipment is relatively short,
The high-frequency coil 5 for the head is photographed from the end of the opening 7 at the photographing position 8.
However, as is well known in MRI systems using superconducting magnets, the depth dimension l is long, so the top plate 3 at the imaging position 8 is placed from the end of the opening 7.
It is difficult to install the head high-frequency coil 5 on top of the head, and the installation is also dangerous.

Therefore, when the top plate 3 supporting the subject 4 is pulled out from the opening 7, the top plate 3
A high-frequency head coil 5 is installed on the head of the subject 4 above, and the top plate 3 is moved into the opening to set the imaging position 8.
I'm trying to send it to you. At this time, the cable 6b' connected to the signal processing device (signal processing unit) 11 installed at a predetermined position in the gantry 1 and the cable 6a' of the high frequency coil 5 for the head are installed at an appropriate position in the gantry 1. Connected with connector c.

(3) Problems to be solved by the invention The cable 6a' of the head high frequency coil 5 is connected to the cable 6b' connected to the signal processing device 11 on the gantry 1.
In the case where the cable 6a' of the high-frequency coil 5 is connected to the connector c installed in the gantry 1, the cable 6a' of the high-frequency coil 5 must be It needs to be kept long.

For this purpose, the high frequency coil 5, that is, the top plate 3
As the cable 6a' of the high-frequency coil 5 moves, it is dragged and moved, and gets entangled with the subject 4.
There were problems in that the movement of the top plate was obstructed, and the cable 6a' collided with the fixed part in the opening 7 or the top plate and was damaged.

In view of the above, an object of the present invention is to provide an MRI apparatus in which the cable of the high-frequency coil installed on the top plate is not dragged and moved by the movement of the top plate.

(4) Means for Solving the Problems In order to achieve the above object, the present invention connects the end of the top plate inserted into the opening of the gantry in a removable manner, and when connected, it is integrated with the top plate. A support member is provided that moves, and this support member is provided with a connector that removably connects the high-frequency coil disposed on the top plate to a cable that connects to a signal processing section fixed in the gantry, and In order to enable the cable to move as the member moves, the cable is curved in the middle and fixed to the fixed part.

(5) Function The support member is provided with a connector that removably connects the high frequency coil placed on the top plate to the cable connected to the signal processing section, and the support member is connected to the end of the top plate to connect the high frequency coil placed on the top plate. move inside the opening in unison with the

Therefore, as the top plate moves, the cable of the high-frequency coil is not dragged and moved, and the cable of the high-frequency coil can be shortened.

In addition, the cable leading from the support member to the signal processing device is curved and fixed to the fixed part, so when the support member is moved, the cable can be moved smoothly below the support member, and the cable processing can be carried out under the top plate. Since it can be done inside the gantry, it does not interfere with the movement of the top plate.

(6) Embodiment An embodiment of the present invention will be described below with reference to FIG. 1.

FIG. 1 is a cross-sectional view showing a schematic configuration of an MRI apparatus according to the present invention. Parts having the same functions as those in FIG.

In the figure, reference numeral 9 denotes a support member disposed within the opening 7 so as to be movable in the depth direction (horizontal direction in the figure).The top plate 3 is attached to the end of the support member 9.
A connecting means is provided to removably connect to the end of the top plate 3 with a hook or the like when the top plate 3 is moved (inserted) inside the opening 7. .

13 is a connector provided on the support member 9;
The cable 6a of the head high-frequency coil 5 is detachably connected to the end of the cable 6b connected to the signal processing device 11.

Further, the middle of the cable 6b from the signal processing device 11 to the connector 13 of the support member 9 is bent as shown in the figure and fixed to the fixing part 10.
This allows for movement in the direction of movement.

Next, the imaging operation of the MRI apparatus with the above configuration will be explained.

The top plate 3 supporting the subject 4 is raised to the upper limit position, and then the top plate 3 is moved in the direction of the opening 7,
The end of the top plate 3 is brought into contact with the end of the support member 9, and the two are connected by a connecting means such as a hook.

In this state, the high-frequency coil 5 for the head is arranged at the head position of the subject 4 on the top plate 3, and the high-frequency coil 5 for the head is connected to the cable 6b by connecting the cable 6a to the connector 13. be done. FIG. 1 shows this state.

Next, when the top plate 3 is moved to the left in the figure,
The support member 9 moves in the opening 7 together with the top plate 3, and as shown in FIG. 2, the movement of the top plate 3 is stopped at the position where the head of the subject 4 reaches the imaging position 8. At this position, a well-known pulse sequence is run to image the head.

When the shooting is finished, move the top plate 3 to the gantry 1.
It is moved in the opposite direction to the state shown in FIG. 1 where it is pulled out from the opening 7 of the. At this position, the connection between the support member 9 and the top plate 3 is released, and the high-frequency coil 5 is removed from the subject 4 and returned to the front of the gantry 1. Thereafter, the top plate 3 is lowered to the lower limit position and the subject 4 is lowered from the top plate 3.

FIG. 3 shows another implementation in which another coil 12 is attached to the subject 4 and its signal cable 6a'' is connected to the connector 13 of the support member 9.

As mentioned above, the connector 13 is detachably connected to the cable 6b connecting the high frequency coil 5 arranged on the top plate 3 to the signal processing device 11 on the support member 7.
The support member 7 is removably connected to the top plate 3, and when connected to the top plate 3, moves together with it within the opening 7 of the gantry 1, so that the cables 6a of the high frequency coils 5, 12 , 6a'' may be the shortest length corresponding to the distance between the connector 13 and the placement positions of the high-frequency coils 5 and 12 on the top plate 3 when the top plate 3 and the support member 7 are connected, and the movement of the top plate 3 The cable 6a of the high frequency coils 5 and 12 is dragged by the
6a″ does not move.

Further, since the cable 6b leading from the support member 7 to the stationary signal processing device 11 is curved in the middle and fixed to a fixed part, movement of the support member 9 is ensured, and the signal cable 6b is connected to the top plate. 3 changes from the state shown in Figure 1 to the state shown in Figure 2, or,
In the opposite situation, as shown in the figure, the cables are handled without getting tangled.

This cable processing can be done using a well-known mechanism such as a cable carrier, but due to the nature of the MRI apparatus, it must be made of non-magnetic material.

In addition, in the above embodiment, the connection and release of the top plate and the support member are performed manually, but the connection and release of both may be performed automatically by using the movement of the top plate 3. .

It is also possible to provide the support member with a connector for connecting an electrocardiogram detector and a respiration detector for electrocardiogram synchronization and respiratory cycle.

(7) Effects According to the present invention, the cable of the high-frequency coil placed on the top plate is not dragged and moved by the movement of the top plate, so the cable of the high-frequency coil is not moved by the top plate or the object placed on it. The top plate can be moved smoothly without getting tangled, and the cable of the high-frequency coil can be shortened because there is no need to make the cable long to allow the movement of the high-frequency coil as in the conventional case.

In addition, since the cable from the support member to the signal processing device (signal processing section) is curved in the middle and fixed to the fixed part, it is possible to ensure smooth movement of the support member and the accompanying cable. Since the cables are handled within the gantry below the top plate, they do not interfere with the movement of the top plate.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing one embodiment of the present invention;
FIG. 2 is a schematic sectional view for explaining the imaging operation, FIG. 3 is a schematic sectional view showing another embodiment, and FIG. 4 is a schematic sectional view of a conventional device. 1... Gantry (MRI apparatus body), 2... Bed, 3... Top plate, 4... Subject, 5, 12... High frequency coil, 6a, 6a''... High frequency coil cable, 6b... Signal Cable connected to the processing device, 7...opening, 9...supporting member, 10...cable fixing section, 11...signal receiving section (signal processing device), 13...connector.

Claims (1)

[Scope of utility model registration request] A gantry having an opening, a bed having a top plate that supports a subject and is movable into the opening, and a high-frequency coil located on the top plate connected to a signal processing unit fixed in the gantry via a cable. In the connected MRI apparatus, a support member that is detachable from the end of the top plate and that moves together with the top plate when connected is movably arranged in the opening, and the high-frequency coil is attached to and detached from the support member. An MRI apparatus characterized in that a connector is provided to freely connect to the cable, and the cable is curved in the middle and fixed to a fixed part.