Verification apparatus (32), for verifying the location of an object (22) in a patient's body (20), the apparatus having learn and test modes and including a receiver (76), which receives signals from the object responsive to the location thereof. A parameter vector is derived from the signals. A memory...http://www.google.es/patents/US6198963?utm_source=gb-gplus-sharePatente US6198963 - Position confirmation with learn and test functions
Position confirmation with learn and test functions
