| CPC G01T 7/005 (2013.01) [A61B 6/037 (2013.01); A61B 6/585 (2013.01); G01T 1/1647 (2013.01); G01T 1/365 (2013.01)] | 20 Claims |
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1. A computer-implemented method, comprising:
accumulating counts for each pixel in a set of pixels of one or more gamma cameras of a single photon emission tomography (SPECT) imaging system from a plurality of imaging examinations of patients and each energy peak of each isotope used in the plurality of imaging examinations of patients to produce an energy spectrum for each of the pixels at each of the energy peaks of each of the isotopes;
determining, for each of the pixels and for each of the energy peaks, an energy calibration factor that converts an energy detected by each of the pixels to an energy of a corresponding energy peak;
populating an energy calibration map for each energy peak with corresponding energy calibration factors;
determining, for each of the pixels and for each of the energy peaks, a uniformity calibration factor that converts a number of counts detected by each of the pixels to a predetermined number of counts for a corresponding energy peak; and
populating a uniformity calibration map for each energy peak with corresponding uniformity calibration factors,
wherein the energy calibration map and the uniformity calibration map are utilized during scanning to calibrate pixel detected energy and pixel count uniformity.
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