Position sensing system for orthopedic applications
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United States of America Patent
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Oct 25, 2011
Grant Date -
Nov 3, 2005
app pub date -
Feb 18, 2005
filing date -
Mar 5, 2004
priority date (Note) -
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Abstract
A surgical tracking system includes a wireless position sensor, which is adapted to be implanted in a bone of a subject, and responsively to externally-applied magnetic fields within a working volume of the tracking system, to generate and transmit sensor signals indicative of coordinates of the position sensor within the bone. A plurality of field generator coils are adapted to generate the magnetic fields so as to define the working volume. The field generators are fixed in predetermined locations to a reference structure, which is movable relative to the subject in order to position the working volume so as to intercept the bone. A system controller is coupled to receive and process the sensor signals so as to determine the coordinates of the position sensor within the bone.
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