Position sensing system and method for using the same
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United States of America Patent
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-
Dec 28, 1999
Grant Date -
N/A
app pub date -
Apr 30, 1996
filing date -
Apr 30, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A positioning system for marking a specified location within tissue includes a hollow needle and a localization wire adapted for insertion through the hollow needle and into the specified location. A transmitter is connected to the localization wire for transmitting a signal through the tissue so that the specified location can be accurately determined when the transmitter is placed thereat. A method of marking a specified location within tissue includes inserting a hollow introducer needle into the tissue until a tip of the needle reaches the specified location. A localization wire having a transmitter is then inserted into the hollow needle until the transmitter is positioned at the specified location. The hollow needle is then removed from the tissue such that only the localization wire and transmitter remain embedded therein. The transmitter is subsequently located by probing an outside surface of the tissue with a receiver until the maximum signal strength is achieved. The maximum signal strength is directly indicative of the transmitter's position at the specified location.
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