Medical diagnosis, treatment and imaging systems
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United States of America Patent
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Sep 7, 2004
Grant Date -
Nov 7, 2002
app pub date -
Mar 23, 1999
filing date -
May 14, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A locating system for determining the location and orientation of an invasive medical instrument, for example a catheter or endoscope, relative to a reference frame, comprising: a plurality of field generators which generate known, distinguishable fields, preferably continuous AC magnetic fields, in response to drive signals; a plurality of sensors situated in the invasive medical instrument proximate distal end thereof which generate sensor signals in response to said fields; and a signal processor which has an input for a plurality of signals corresponding to said drive signals and said sensor signals and which produces the three location coordinates and three orientation coordinates of a point on the invasive medical instrument.
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