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

  • US 6,636,757 B1
  • Filed: 06/04/2001
  • Issued: 10/21/2003
  • Est. Priority Date: 06/04/2001
  • Status: Expired due to Term
First Claim
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1. An electromagnetic navigation system for use in navigating a probe through an electromagnetic field positioned near a C-arm, said electromagnetic navigation system comprising:

  • a transmitter coil array having a plurality of transmitter coils, said transmitter coil array operable to generate the electromagnetic field to navigate the probe; and

    a shield attached to the C-arm, said shield operable to substantially shield the C-arm from the electromagnetic field generated by said transmitter coil array, wherein said shield substantially reduces distortion of the electromagnetic field by the C-arm, thereby enabling accurate navigation of the probe in the electromagnetic field.

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