JP4699178B2 - X-ray CT system - Google Patents

Description

  The present invention relates to an X-ray CT apparatus having a bed on which a subject is placed, particularly a function for ensuring safety when the bed is lowered, and a function for freely moving in the horizontal direction to change the scanning position. And an X-ray CT apparatus provided with

Conventionally, transfer of a patient from a patient transfer apparatus such as a stretcher to a bed of an X-ray CT apparatus is performed as described in Patent Document 1. Specifically, the top plate shared between the stretcher and the couch or between the two couches, and the height of at least one of the stretcher, the couch, or the two couches is set to the height of the other couch With the height adjustment mechanism that matches the mounting part, the top board guide mechanism that guides the movement of the top board between the stretcher and the couch or the two couches where the height of the couch mounting part is matched, and this top board guide mechanism A top plate fixing mechanism for fixing the guided and moved top plate at a predetermined position is provided so that the subject can be transferred together with the top plate between the stretcher and the bed or between the two beds. As a result, when rapid subject transfer is required, labor and labor at the time of subject transfer between the stretcher, the medical image diagnostic apparatus, and the bed of different medical image diagnostic apparatuses Reduction of the burden on the subject, reduction of the risk of catheter removal from the patient can be achieved.
Japanese Patent Laid-Open No. 7-18156

  However, since the subject gets on and off the bed, the bed has a mechanism that can move vertically and change the height, but if the stretcher or wheelchair is near the bed, the bed is lowered when the bed is lowered And avoiding contact with stretchers and wheelchairs.

  An object of the present invention is to provide an X-ray CT apparatus capable of contacting a couch with a stretcher or a wheelchair when adjusting the couch height.

In the X-ray CT apparatus having a bed on which a subject is placed, the object is to provide a contact detection unit that is provided in the bed and detects contact, and a bed control that controls the operation of the bed based on the detection of the contact detection unit. To achieve this.

  According to the present invention, it is possible to avoid contact between a bed and a stretcher or a wheelchair when adjusting the bed height.

Hereinafter, an embodiment of the present invention will be described.
The X-ray CT apparatus moves the movable part of the bed in the horizontal direction and scans at that position to collect tomographic images of various parts of the subject. It is possible to collect a large amount of tomographic images at a time by moving in the direction and scanning the subject spirally.

  The bed includes a bed fixing portion, a vertical movable portion, and a horizontal movable portion. The vertical movable part is connected to the fixed part by a link mechanism or the like and moves vertically. The horizontal movable part moves horizontally on the vertical movable part by a belt or a ball screw. Thus, the subject on the horizontal movable part can move vertically and horizontally.

The horizontal movable part of the bed is operated by positioning by pressing the movement button by the operator or by driving a belt or a ball screw by a signal from the CPU controlling the CT device at the time of operation. The movable part cannot freely move horizontally on the vertical movable part.
In addition, in order to retract the bed movable part from the scanner in the event of an emergency, a mechanism that releases the fixed horizontal movable part of the bed and can freely move in the horizontal direction is also provided.
The horizontal movable part can be fixed / released by turning the grip at the end of the horizontal movable part, pressing the button located beside the grip, or latching or clutching between the vertical movable part and the horizontal movable part. It is realized by canceling.

FIG. 1 shows a schematic configuration of an X-ray CT apparatus according to the present invention, and FIG. 2 shows a block diagram of the X-ray CT apparatus according to the present invention.
As shown in FIG. 1, a tape-like switch 002 (which may be a linearly continuous switch group) may be attached below the bed vertical movable portion 003.

As shown in FIG. 2, the ON / OFF signal of the switch 002 is sent to the bed control CPU 007. When the bed control CPU 007 receives an ON signal from the switch 002 when it does not receive a signal for instructing to lower the bed vertical movable unit 003 from the main control CPU 006, the bed control CPU 007 releases the fixation of the bed horizontal movable unit 004 and A signal that the fixing of the movable part 004 is released is transmitted to the main control CPU 006. The main control CPU 006 turns on the LED 005 of the scanner 001 to indicate to the operator that the bed horizontal movable unit 004 has been released. If the bed control CPU 007 receives an ON signal from the switch 001 again without receiving a signal for instructing to lower the bed vertical movable part 003 from the main control CPU 006, the bed horizontal movable part 004 is fixed and the bed horizontal A signal that the movable part 004 is fixed is transmitted to the main control CPU003. The main control CPU 006 turns off the LED 005 indicating that the bed horizontal movable portion 004 has been fixed.
However, when the bed control CPU 007 receives an ON signal from the switch 001 while receiving a signal for instructing to lower the bed vertical movable unit 003 from the main control CPU 006, the bed control CPU 007 immediately lowers the bed vertical movable unit 003. And stop signal is sent to the main control CPU006.

  With this embodiment, you can press the switch at the bottom of the bed anywhere near the bed to release the fixed horizontal moving part and move the horizontal moving part of the bed manually. It is possible to respond, and safety is improved. Also, in order to manually move the horizontal movable part of the bed not only during emergency evacuation but also to adjust the subject to the scanning position, it is very possible to fix / release the horizontal movable part anywhere near the bed. Useful.

  In addition, the switch functions when the couch is lowered. By detecting that the switch has been pressed when descending and stopping the descending operation, it is possible to prevent pinching, and further safety can be ensured.

  In this embodiment, the case where the bed is lowered has been described as an example. However, even when there is a possibility that the patient transfer device may be touched when the bed is raised, the embodiment of the present invention is included.

Schematic configuration of X-ray CT apparatus. Block diagram of an X-ray CT apparatus.

Explanation of symbols

  001 Scanner, 002 Tape-like switch, 003 Vertical moving part of bed, 004 Horizontal moving part of bed, 005 LED, main control CPU, 007 bed control CPU

Claims (3)

In an X-ray CT apparatus having a bed on which a subject is placed,
A contact detection unit provided in the bed for detecting contact;
A bed control unit for controlling the operation of the bed based on the detection of the contact detection unit;
Equipped with a,
The X-ray CT apparatus characterized in that the bed control unit fixes or releases the bed in the horizontal direction when the contact detection unit detects contact while the bed is stopped in the vertical direction . The X-ray CT apparatus according to claim 1,
The X-ray CT apparatus characterized in that the bed control unit stops movement of the bed in the vertical direction when the contact detection unit detects contact while the bed is moving in the vertical direction. The X-ray CT apparatus according to claim 1 or 2,
The X-ray CT apparatus , wherein the contact detection unit is provided below the bed and extends in a longitudinal direction of the bed .

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