Independently positionable transducers for location system

A - Human Necessities – 61 – B

Patent

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Details

A61B 5/05 (2006.01) A61B 8/12 (2006.01) A61M 25/095 (2006.01)

Patent

CA 2246290

A system for determining the disposition of a probe within the body of a patient includes a probe (20) having probe field transducers (30) and a plurality of reference field transducers (100A)-(100C). The reference field transducers are independently moveable with respect to one another to desired, customized positions close to the body of the patient. Calibration transducers (316a)-(316c) determine the relative positions of the field transducers with respect to one another after they are located in their desired positions. Non-ionizing fields are transmitted and detected between the probe and the reference field transducers. From the detected fields, the relative disposition of the probe with respect to the reference field transducers is determined.

L'invention concerne un système servant à déterminer la position d'une sonde à l'intérieur du corps d'un patient et qui inclue une sonde (20) équipée de transducteurs de champ de sonde (30) ainsi que plusieurs transducteurs de champs de référence (100A)-(100C). Les transducteurs de champs de référence peuvent être placés indépendamment l'un de l'autre près du corps du patient, dans des positions que l'on désire et qu'il est possible de personnaliser. Les transducteurs d'étalonnage (316a)-(316c) déterminent les positions relatives des transducteurs de champ l'un par rapport à l'autre, une fois que ceux-ci ont été placés dans les positions désirées. Des champs non ionisants sont transmis et détectés entre la sonde et les transducteurs de champs de référence. Sur la base des champs détectés, est déterminée la position relative de la sonde par rapport aux transducteurs de champs de référence.

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