DEVICE FOR DETECTING POSITION OF CAPSULE-SHAPED ENDOSCOPE, CAPSULE-SHAPED ENDOSCOPE SYSTEM, AND PROGRAM FOR DETERMINING POSITION OF CAPSULE-SHAPED ENDOSCOPE
Provide are a position detecting apparatus and a capsule endoscope system that are capable of performing, at high speed, a process for estimating a position and orientation of the capsule endoscope in a body cavity. The position detecting apparatus of a capsule endoscope according to the present invention includes: a receiving antenna unit for receiving, by a plurality of receiving antennas (40), a wireless signal transmitted from a capsule endoscope within a subject a storage unit (56) for storing a theoretical electric field strength of the wireless signal received by each of the receiving antennas (40), the theoretical electric field strength depending on a position or a position and orientation of the capsule endoscope in the subject an electric field strength comparing unit (593) for comparing a specified value calculated by using a difference between a received electric field strength of the wireless signal received by each of the receiving antennas (40) and the theoretical electric field strength stored in the storage unit and a position determination unit (594) for determining a position or a position and orientation of the capsule endoscope where image data has been taken, based on a comparison result by the electric field strength comparing unit (593).
