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Gamma camera with approach and safety planes

  • US 5,677,535 A
  • Filed: 05/01/1995
  • Issued: 10/14/1997
  • Est. Priority Date: 05/03/1994
  • Status: Expired due to Term
First Claim
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1. A gamma camera comprising a frame, a base movable on the frame for rotation about a rotational axis and at least one arm movable with respect to said frame, capable of moving away radially with respect to the rotational axis and provided, at one free end, with a detector, said camera further comprising two approach planes substantially parallel to a plane of said detector so as to servo-control the relative position of one edge of a patient positioned between said two planes, and a safety plane positioned between the collimator and the two approach planes and substantially parallel to said collimator so as to define a limit position of the proximity of the patient wherein the planes are in the form of rows of light-emitting diodes positioned so as to face rows of photodetectors and further wherein a row of diodes of a plane is offset with respect to the perpendicular to diodes of a row of diodes of a neighboring plane.

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