公开(公告)号：US20190090778A1

公开(公告)日：2019-03-28

申请号：US16198050

申请日：2018-11-21

Applicant: OLYMPUS CORPORATION

Inventor： Yoshinori IKEDA ,  Shinichi NAKAJIMA ,  Akihiro KUBOTA

IPC: A61B5/06 ,  A61B1/04 ,  A61B1/00

Abstract: A capsule endoscope position detection method includes first to third steps. The method uses at least four antennas configured to receive signals wirelessly transmitted from a capsule endoscope inside a subject. In the first step, a calculation device calculates a distance difference between a first distance and a second distance on the basis of the signals received by two of the at least four antennas. The first distance is a distance between one of the two antennas and a capsule endoscope. The second distance is a distance between the other of the two antennas and the capsule endoscope. In the second step, the calculation device selects at least three distance differences among the distance differences calculated in the first step. In the third step, the calculation device calculates a Z coordinate of the capsule endoscope on the basis of the selected distance difference.

公开(公告)号：US20210330180A1

公开(公告)日：2021-10-28

申请号：US17371444

申请日：2021-07-09

Applicant: OLYMPUS CORPORATION

Inventor： Naoto KOIDE ,  Shinichi NAKAJIMA

IPC: A61B1/04 ,  A61B1/00

Abstract: A receiving device transmits and receives a radio signal by radio communication with a capsule endoscope introduced inside a subject. The receiving device includes: a first receiver configured to selectively receive the radio signal by switching between a first frequency and a second frequency; a second receiver configured to receive positioning information from an external positioning system; a processor configured to acquire information indicating whether the positioning information has been received from the positioning system, and a signal level of a signal at, at least one of the first frequency and the second frequency, and set to either one of a mode in which the first frequency is used for the radio communication and a mode in which the second frequency is used for the radio communication; and a first transmitter configured to transmit information of frequency according to the set mode to the capsule endoscope.