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Analog time adjustment for coincidence detection electronics

  • US 6,232,604 B1
  • Filed: 11/06/1998
  • Issued: 05/15/2001
  • Est. Priority Date: 11/06/1998
  • Status: Expired due to Fees
First Claim
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1. A method to be used with a PET scanner which includes a plurality of detector units, each detector unit including a detection surface area, when a photon impacts a detection surface area at a detection point and an event time, the scanner generating an event detection pulse (EDP), scanner hardware which processes impacting photons causing varying delays between event times and corresponding EDPs, the detector delay corresponding to each detector unit varying as a function of detection point, the method for modifying the EDPs so that the timing of each EDP is essentially temporally accurate relative to all other EDPs, the method comprising the steps of:

  • for each EDP;

    identifying the detection point;

    selecting a compensation factor as a function of the detection point and the generating detector; and

    modifying the EDP as a function of the compensation factor.

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