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US 8,465,418 B2Granted
Capsule-type medical device
AssigneeOlympus Medical Systems Corp.
InventorsJun Hasegawa, Tetsuo Nonami
Life of this patent
Estimating the term…
Abstract
The position of an antenna incorporated in a capsule-type endoscope 3 that moves in a body is estimated using a plurality of antennae, and where the distance dij between two positions Pti and P(t−1)j estimated at adjacent times falls within a predetermined value, pieces of information for these positions are related to each other and stored in a memory as connection information. Subsequently, processing for searching for a route from the connection information stored in the memory and calculating a track is performed.
Claims4
A capsule-type medical device comprising:
- a capsule-type in-vivo device including an antenna, the capsule-type in-vivo device being inserted into a living body;
- a wireless transmission section for transmitting wirelessly an electromagnetic wave signal from the antenna in the capsule-type in-vivo device;
- a plurality of extracorporeal antennae arranged outside the living body;
- an estimation section for estimating a position of the antenna or the capsule-type in-vivo device from the electromagnetic wave signal at a time when the electromagnetic wave signal was received by the plurality of extracorporeal antennae;
- and
- a track calculating section for calculating a track of movement of the capsule-type in-vivo device according to a condition set for the case where a plurality of positions at mutually different times have been estimated by the estimation section;
- wherein the track calculating section defines an evaluation function for two temporally adjacent estimated positions, the evaluation function including information on a distance between the two positions and estimation information obtained when the two positions are estimated, and calculates the track, employing a value according to the evaluation function being equal to or lower than a predetermined value, as the condition.
4 more elements
Dependencies are inferred from the claim text.