POSITION SENSOR, MEDICAL DEVICE GUIDING SYSTEM, POSITION SENSING METHOD, AND MEDICAL DEVICE GUIDING METHOD

摘要

The position of an object incorporating an LC marker is stably sensed. A position sensor (10) comprises sets of drive coils (DXs, DYs, DZs), a magnetic field producing coil changing section (15) for changing the drive coil for applying a magnetic field to an LC marker (2a) inside a capsule endoscope (2) among the sets of drive coils (DXs, DYs, DZs), a storage unit (19) for storing therein predetermined information on the selection condition of the drive coils, and a control unit (20). From the results of sensing the induced magnetic field from the LC marker (2a), the position of the capsule endoscope (2) is determined. According to the predetermined information, the control unit (20) determines the selection condition of the drive coils and selects a drive coil satisfying the determined selection condition from among the drive coils (DXs, DYs, DZs), and controls the magnetic field producing coil changing section (15) so as to change the drive coil to the selected one.