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Apparatus responsive to movement of a patient during treatment/diagnosis

DC CAFC
  • US 5,727,554 A
  • Filed: 09/19/1996
  • Issued: 03/17/1998
  • Est. Priority Date: 09/19/1996
  • Status: Expired due to Term
First Claim
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1. Apparatus responsive to movement of a patient positioned on a patient positioning assembly during treatment/diagnosis, said apparatus comprising:

  • camera means generating digital image signals representing an image of at least one passive fiducial having a lambertian surface on said patient; and

    processing means comprising means responsive to actual shape, appearance and lighting conditions of said at least one passive fiducial having a lambertian surface in said image represented by said digital image signals to determine successive positions of said at least one passive fiducial having a lambertian surface, means repetitively determining movement of said at least one passive fiducial having a lambertian surface from said successive positions, and means generating an output in response to predetermined values of said movement.

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