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Hybrid magnetic-based and impedance-based position sensing

  • US 20070016007A1
  • Filed: 07/15/2005
  • Published: 01/18/2007
  • Est. Priority Date: 07/15/2005
  • Status: Active Grant
First Claim
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1. A method for position sensing, comprising:

  • introducing a probe comprising a magnetic field transducer and at least one probe electrode into a body cavity of a subject;

    measuring position coordinates of the probe at a location in the body cavity using the magnetic field transducer;

    measuring an impedance between the at least one probe electrode and one or more points on a body surface of the subject; and

    calibrating the measured impedance using the measured position coordinates.

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