Patent ID: 7686757
Filing Date: 2010-03-30
Classification: A61B

Abstract:
1. A body-insertable apparatus system comprising: a body-insertable apparatus that is introduced into a subject and moves inside the subject, the body-insertable apparatus including a magnetic field sensor that detects strength of a magnetic field for position detection at a position at which the body-insertable apparatus is present, and a radio transmitting unit that transmits a radio signal that contains information on the strength of the magnetic field detected by the magnetic field sensor; and a position detecting apparatus that detects a position of the body-insertable apparatus inside the subject using the predetermined magnetic field for position detection, the position detecting apparatus including a magnetic field generator that generates the magnetic field for position detection, and a body-size information detector that is arranged at a predetermined position on the outer surface of the subject, and includes a magnetic field sensor unit that detects strength of the magnetic field for position detection at the arranged position as body-size information, the body-size information corresponding to a shape of an outer surface of the subject; a magnetic-field strength controller that controls the strength of the magnetic field for position detection generated by the magnetic field generator, based on the body-size information.