×

Method of real-time crystal peak tracking for positron emission tomography (PET) avalanche-photodiodes (APD) detector

  • US 8,117,142 B2
  • Filed: 10/06/2008
  • Issued: 02/14/2012
  • Est. Priority Date: 10/04/2007
  • Status: Active Grant
First Claim
Patent Images

1. A method for generating a crystal lookup table for use in a nuclear imaging scanner having scintillation detectors with scintillation crystals and photodetectors, comprising:

  • generating a block position profile for a multiplicity of events, the block position profile consisting of X and Y position data of said events;

    sequentially reading the X and Y position data of the events in said block position profile;

    inputting the X and Y data for each of said events into a self-organizing feature map as an input vector;

    determining a winning neuron a using a competitive layer;

    updating the weight matrix for all neurons within a predetermined neighborhood to generate pixel locations;

    applying a weighted learning rate based on a histogramming count to compensate for photodetector gain drifting; and

    following system training, constructing a crystal lookup table using the generated pixel locations.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×