Position detecting apparatus using the magnetic field...

Details Position detecting apparatus using the magnetic field... Position detecting apparatus using the magnetic field...

2007-03-27

2011-11-01

Smith, Ruth S (Department: 3737)

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

C600S117000, C600S118000, C600S407000, C128S899000, C702S150000, C702S153000

Reexamination Certificate

active

08050738

ABSTRACT:
A position detecting apparatus includes a linear magnetic-field generator that generates a linear magnetic field in an area inside the subject; a diffuse magnetic-field generator that generates a diffuse magnetic field having position dependency on magnetic field direction in the area; a magnetic-field line orientation database in which a correspondence between magnetic field direction and position of the diffuse magnetic field in a reference coordinate axis is recorded; an orientation calculator that calculates orientation information of a body-insertable device introduced into a subject in the reference coordinate axis based on linear magnetic-field information and the earth magnetism direction; and a position calculator that calculates a magnetic field direction of the diffuse magnetic field at the position of the body-insertable device based on the linear magnetic-field information, orientation information, and diffuse magnetic-field information, and calculates the position of the body-insertable device based on the magnetic field direction and correspondence recorded.

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