| CPC G01T 1/2985 (2013.01) [A61B 6/037 (2013.01); A61B 6/4241 (2013.01); G06T 11/003 (2013.01)] | 17 Claims |
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1. A positron emission tomography (PET) scanner having a plurality of detector subsystems, comprising:
processing circuitry configured to
determine, for each detector subsystem of the plurality of detector subsystems, a singles count loss correction factor of the detector subsystem;
determine, for each detector subsystem pair of a plurality of pairs of the detector subsystems, a coincidence count loss correction factor for the detector subsystem pair;
calculate a scanner coincidence count loss correction factor for the PET scanner based on the coincidence count loss correction factors determined for the plurality of pairs of the detector subsystems; and
reconstruct an image based on the calculated scanner coincidence count loss correction factor and scan data acquired from a scan of a patient performed using the PET scanner,
wherein the processing circuitry is further configured to determine, for each detector subsystem of the plurality of detector subsystems, the singles count loss correction factor of the detector subsystem based on a processing-speed threshold of the detector subsystem.
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17. A non-transitory computer-readable medium storing a program that when executed by processing circuitry of a positron emission tomography (PET) scanner having a plurality of detector subsystems, causes the processing circuitry to perform a method of count loss correction for, the method comprising:
determining, for each detector subsystem of the plurality of detector subsystems, a singles count loss correction factor of the detector subsystem;
determining, for each detector subsystem pair of a plurality of pairs of the detector subsystems, a coincidence count loss correction factor for the detector subsystem pair;
calculating a scanner coincidence count loss correction factor for the PET scanner based on the coincidence count loss correction factors determined for the plurality of pairs of the detector subsystems; and
reconstructing an image based on the calculated scanner coincidence count loss correction factor and scan data acquired from a scan of a patient performed using the PET scanner, wherein the method further comprises:
determining that count loss for a particular detector subsystem pair, of the plurality of pairs of the detector subsystems, is correlated; and
determining the coincidence count loss correction factor for the particular detector subsystem pair by taking a maximum of the singles count loss correction factors of the detector subsystems included in the particular detector subsystem pair.
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