JPH0690925A - Cable processing mechanism - Google Patents

Abstract

PURPOSE:To dispense with a coiling mechanism of a cable, and to improve the performance and a service life of the cable by constituting a signal receiving cable in an MRI device so that an examinee can be contained into a bed by dead weight of the cable in connection with a movement of a horizontal moving part of a placing device. CONSTITUTION:A top plate 4 on which an examinee can be placed in a lying state is placed so that it can be taken in and out freely and can be moved horizontally and freely against a static magnetic field space, and a signal receiving cable 5 for connecting a receiving coil for receiving a nuclear magnetic resonance signal and a signal amplifier in connection with a movement of this top plate 4 is contained in a bed. That is, the cable 5 is connected to the signal amplifier through a connector base 8 in a state that one end and the other end are fixed to the rear end of the top plate 4, and the rear part of a pan 6, respectively. Also, a movable part 5a placed in an unloose state at the time when the top plate 4 is in an initial position on the bed is loosened in connection with a movement of the top plate 4, contained by dead weight on the pan 6 combined with a water receiver, and the part protruding from the pan 6 is extended on a cable receiver 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable processing mechanism for connecting a probe and a preamplifier in MRI.

[0002]

2. Description of the Related Art A cable for connecting a probe and a preamplifier in a commonly used MRI is laid on a top plate, and the probe is moved to move in and out along with the movement of the probe or a winder. Is forcibly wound up with.

[0003]

When the cable is moved in and out with the movement of the probe, there are many problems such as when the cable does not move in and out smoothly or when the cable is caught in the gap between the devices. Further, in order to forcibly wind up, a winding mechanism is required, and the cable is bent strongly with a small curvature, which adversely affects the performance and life of the cable. The present invention aims to solve these problems.

[0004]

[Means for Solving the Problems] A movable part of a cable is provided inside a device and a guide is provided at the movable part, and the cable is allowed to fall onto a cable pedestal by its own weight without applying an excessive force. The mechanism allows it to be stored.

[0005]

[Function] A cable length equal to the movement amount of the probe is provided in the apparatus in a free state, half of the movement amount pushes out the cable, and the weight of the cable causes it to fall inside the bed, while the remaining half of the movement amount , The mechanism to pull up the cable.

[0006]

Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 is a diagram conceptually showing the overall system configuration of an MRI to which a cable processing mechanism according to the present invention is applied.

In FIG. 1, there is a magnet 1 and a static magnetic field space 2 generated by the magnet 1. The subject 3 is lying on the top plate 4, and the static magnetic field space 2 is moved along with the horizontal movement of the top plate.
To move inside. FIG. 1 is a diagram showing a state before the movement of the tabletop is started.

2 to 4 are views conceptually showing how the cable moves as the top plate moves.

FIG. 2 is a diagram before starting the movement of the top plate.

FIG. 3 is a diagram in which the top plate has moved half the amount of movement.

FIG. 4 is a diagram in which the top plate has moved the entire amount of movement.

FIG. 2 shows a state in which the movable portion 5a of the cable 5 is not loose. FIG. 3 shows a state in which the movable part 5a is maximally loosened and is accommodated on the tray 6 which also serves as a water receiver inside the bed by its own weight. Further, the portion protruding from the tray 6 extends on the cable receiver 7.

In FIG. 4, the movable part 5a is pulled up,
Although it is not on the tray 6 but there is some looseness, it means that the hole 10 for dropping the cable is provided on the front side (on the magnet side) of the 1/2 position of the top plate movement amount.
The hole 10 may be provided at a slightly different position.

One end of the movable portion 5a of the cable 5 is attached to the top plate 4
The other end is fixed to the rear part of the tray 6.
The cable 5 is further connected to the connector base 8 and connected to the preamplifier. Between the saucer 6 and the connector base 8,
The fixed portion 5b is not affected by the movement of the top plate 4.

The movable portion 5a of the cable 5 is constructed so as to slide on the cable guide 9 which also serves as a water receiver as the top plate 4 moves.

The cable 5 is covered with a coating in order to reduce sliding friction.

Connect the front side (magnet side) of the cable guide 9 to 9
a and 9b on the rear side.

In addition to the illustrated 9a and 9b, the cable guides are also provided on the left and right sides and on the upper side (not shown).

In other words, if the expression of this embodiment is changed, "the cable 5 is accommodated in the two-step one-sill of moving the top plate 4 forward and backward,
It is a four-step, one-sail method of discharging, storing, and discharging, and when viewed from the position of the tray 6, the moving length of the cable is half the moving distance of the top plate, which makes it easy to process the cable. ”

[0021]

As described above, according to the present invention, as shown in FIGS. 2 to 4, the movable portion 5a of the cable 5 moves along with the movement of the top plate 4 through the hole 10 through which the cable is dropped. The movable part 5a is housed on top of 6 by its own weight.

Therefore, the cable winding mechanism becomes unnecessary, and the performance and life of the cable are not adversely affected by applying unreasonable force to the cable.

Furthermore, since the processing of the cable is performed inside the bed, there is no effect on the handling of the subject.

[Brief description of drawings]

FIG. 1 is an MRI using a cable processing mechanism according to the present invention.
It is a block diagram which shows the whole system of FIG.

FIG. 2 is a conceptual diagram showing an operation of a cable in a bed, and is a diagram showing a state before the top plate starts moving.

FIG. 3 is a conceptual diagram showing the operation of the cable in the bed, and is a diagram showing a state in which the top plate has moved half the movement amount.

FIG. 4 is a conceptual diagram showing the operation of the cable in the bed, and is a diagram showing a state in which the top plate has moved the entire amount of movement.

[Explanation of symbols]

1 ... Magnet, 2 ... Static magnetic field space, 3 ... Subject, 4 ... Top plate, 5
... cable, 5a ... movable part of cable, 5b ... fixed part of cable, 6 ... saucer, 7 ... cable receiver, 8 ... connector base, 9 ... cable guide, 9a ... cable guide front side,
9b ... Rear side of the cable guide, 10 ... Hole for dropping the cable.

Claims (5)

[Claims] 1. An MR imaging device (hereinafter referred to as MRI) for performing image diagnosis, chemical measurement, and blood flow measurement using a nuclear magnetic resonance phenomenon.
In the above), a signal receiving cable (hereinafter referred to as a cable) that connects a receiving coil (hereinafter referred to as a probe) and a signal amplifier (hereinafter referred to as a preamplifier) that receives a nuclear magnetic resonance signal is measured at a measurement position in the static magnetic field space of the MRI. A cable processing mechanism characterized in that a horizontal movement part (hereinafter, referred to as a top plate) of a subject placement device (hereinafter, referred to as a bed) in which a person is placed is stored in the bed by its own weight due to movement of the cable. 2. When the probe moves to a measurement position in the static magnetic field space according to claim 1, half of the moving amount is stored in the bed by the weight of the cable, and the other half of the moving is
A cable handling mechanism characterized by being pulled out by moving the bed. 3. The bed according to claim 2, wherein the cable is fixed from the probe attached to the tip of the top plate (on the side of the static magnetic field) to the rear end of the top plate, and then folded back without being fixed to the middle of the bed. A cable processing mechanism characterized by being pulled into the bed from the part and being connected to the preamplifier through the inside of the bed. 4. The cable processing mechanism according to claim 3, wherein the cable folded back from the rear end portion of the top plate is provided with a cable guide vertically and horizontally to have other functions. 5. The cable processing mechanism according to claim 4, wherein the cable is provided with a friction reducing coating.