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Systems and methods for monitoring wear and/or displacement of artificial joint members, vertebrae, segments of fractured bones and dental implants

  • US 20020115944A1
  • Filed: 01/31/2001
  • Published: 08/22/2002
  • Est. Priority Date: 11/18/1999
  • Status: Active Grant
First Claim
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1. A distance measurement system comprising:

  • (a) at least one resonant circuit;

    (b) at least one magnetic element having predetermined magnetic properties;

    (c) a transmitter operable to transmit an electromagnetic pulse;

    (d) a receiver operable to detect oscillations emitted by said resonant circuit in response to said electromagnetic pulse; and

    (e) an analyzer operable to analyze an amplitude envelope property of said oscillations, to thereby determine a distance between said resonant circuit and said magnetic element.

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