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Method and apparatus for electromagnetic navigation of a surgical probe near a metal object

  • US 20040116803A1
  • Filed: 01/09/2004
  • Published: 06/17/2004
  • Est. Priority Date: 06/04/2001
  • Status: Abandoned Application
First Claim
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1. A method for calibrating an electromagnetic navigation system having a transmitter coil array that generates an electromagnetic field, said method comprising:

  • (a) positioning the electromagnetic navigation system in a working environment to account for metallic distortion caused by a metallic object adjacent to the electromagnetic field;

    (b) positioning a calibration sensor at a first calibration point;

    (c) energizing a first coil in the transmitter coil array to generate a first field;

    (d) sensing a first field strength of the first field with the calibration sensor; and

    (e) repeating steps (b), (c) and (d) at a second calibration point, wherein effects of metallic distortion caused by the metallic object is taken into account during the calibration process and wherein the metallic object is a medical device.

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