Method and apparatus for determining the position of a body part
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United States of America Patent
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-
Sep 15, 1998
Grant Date -
N/A
app pub date -
Oct 22, 1996
filing date -
Feb 23, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
To improve the reliability of a process for determining the position of a body part in which bone screws are screwed into the bone of the body part in question, each bone screw is provided with a radiation emitter or radiation receiver. A number of fixed receivers or emitters are used as appropriate to receive radiation from the bone screw transmitters or direct radiation towards the bone screw receivers. The radiation direction and/or radiation propagation time and/or radiation field strength or frequency is used to determine the position of each radiation emitter or receiver. A system for determining position based on this procedure and bone screws which can be used therefor are also disclosed.
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