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Combined laser spirometer motion tracking system for radiotherapy

  • US 20040254492A1
  • Filed: 11/18/2003
  • Published: 12/16/2004
  • Est. Priority Date: 06/13/2003
  • Status: Active Grant
First Claim
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1. A respiration monitor comprising:

  • a spirometer adapted to receive air flow from a patient'"'"'s lungs with breathing to provide an air flow signal;

    a chest displacement sensor adapted to monitor displacement of the patient'"'"'s chest with breathing to provide a chest displacement signal; and

    a calibration circuit receiving the air flow signal and the chest displacement signal to provide a corrected respiration signal combining information from both the air flow signal and the chest displacement signal.

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