Capsule medical device position/posture detecting system

Abstract

A detecting system of the position and the posture of a capsule medical device includes a main body of the capsule medical device that is inserted in a living body, a coil in a capsule that is arranged to the main body of the capsule medical device and forms a resonant circuit, a magnetic field generating device that is arranged around the living body and generates the Alternating magnetic field for generating an induced magnetic field in the coil in the capsule, and a plurality of magnetic field detecting devices that detect the strength of the induced magnetic field generated by the coil in the capsule by the magnetic field generated by the magnetic field generating device.

Description

technical field [0001] The present invention relates to a capsule medical device position / posture detection system for detecting the direction and position of a capsule medical device main body inserted into a body cavity. Background technique [0002] As a conventional example of traveling within a subject by means of a rotating magnetic field, there is, for example, Japanese Patent Laid-Open No. 2001-179700. In the above-mentioned Japanese Patent Application Laid-Open No. 2001-179700, a mobile control system for a movable micro-equipment is disclosed, which has: a magnetic field generator that generates a rotating magnetic field; a robot body that receives the rotating magnetic field and rotates to obtain thrust; a position detecting unit for the position of the robot main body; and a magnetic field changing unit that changes the direction of the rotating magnetic field formed by the magnetic field generating unit so that the robot main body faces a direction to reach a de...

AI Technical Summary

Problems solved by technology

[0005] However, in the position detection unit used in the movement control system of the microdevice described in the above-mentioned Japanese Patent Laid-Open No. 2001-179700, the rotating magnetic field that supplies the rotating magnetic field to the microdevice and the magnetic field based on the above-mentioned magnet interfere (mutual influence). ), it is difficult to correctly detect the orientation and position of the aforementioned tiny devices

[0006] In addition, in the movement control system of the microdevice described in the above-mentioned Japanese Patent Laid-Open No. 2001-179700, when the width or diameter of the lumen becomes smaller or narrower, or the lumen is wavy, such as the intracavity pipeline, there may be problems. Phenomenon that micro devices, etc. cannot be guided smoothly

[0007] Therefore, when the movement control system for a microdevice described in Japanese Patent Application Laid-Open No. 2001-179700 is applied to guide and control a capsule medical device moving in a body cavity, the direction change of the capsule medical device is suppressed by the lumen, Cannot always travel in the specified direction, switch directions

Therefore, when a magnetic field in the target direction is generated without taking the above into consideration, the capsule medical device may become inoperable due to the restraint of the lumen.

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