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System for excitation of a leadless miniature marker

  • US 6,812,842 B2
  • Filed: 12/20/2001
  • Issued: 11/02/2004
  • Est. Priority Date: 12/20/2001
  • Status: Expired due to Term
First Claim
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1. A system for generating a pulsed excitation field for excitation of a leadless marker assembly in or on a body, comprising:

  • an energy storage device;

    a source coil configured to deliver a pulsed magnetic excitation signal to the leadless marker assembly, said pulsed magnetic excitation signal being of sufficient strength and of sufficiently limited duration to cause the leadless marker assembly to generate a marker signal that is measurable outside of the body; and

    a switching network coupled to the energy storage device and the source coil wherein the switching network is configured to alternately transfer stored energy from the energy storage device to the source coil and to transfer energy from the source coil back to the energy storage device.

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