Tracking system
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Abstract
A tracking system of the invention comprises a fixed part (30) and a consumable sensor capsule (1) the location of which is tracked in real time as it moves through the GI tract. The fixed part emits (31) acoustic signals, and the capsule receives these signals and in turn generates, after a set time delay, a response which is received by the fixed part and a computation is made of the distance between the capsule and the fixed part based on the time of flight and the intervening organs as modelled in the system'"'"'s processor. The response is transmitted after a pre-set time delay and so is a simulated echo. Multiple receivers (36) are located at positions on a belt (40) chosen so that interference by bone is minimised, and so that the tracking procedure is ambulatory. The capsule has sensors (12, 13) which transmit data via an RF antenna incorporated in the capsule casing.
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Citations
42 Claims
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1-21. -21. (canceled)
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22. A tracking system comprising:
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an internal device configured for moving in an internal tract of the body, the internal device comprising an acoustic receiver and an acoustic transmitter, an external apparatus comprising an acoustic transmitter and a plurality of acoustic receivers, an external controller for directing transmission of incident acoustic signals by the transmitter of the external apparatus and for monitoring detection of acoustic responses by the receivers, an internal controller for monitoring detection of said incident signals by the receiver of the internal device and for directing transmission of said acoustic responses by the transmitter of the internal device, and a data processor for determining time-of-flight data for the acoustic signals, and for generating location data for the internal device according to said time-of-flight data. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification