Normalization Coefficients in PET Continuous Bed Motion Acquisition

摘要

Normalization coefficients in are computed for positron emission tomography (PET) continuous bed motion acquisition (CBM). The normalization coefficients for the lines-of-response in CBM account for the change in decay of the injected isotope over time and/or changes in velocity of the bed motion.

主权项

1. A method for computing normalization coefficients in continuous bed motion acquisition, the method comprising:
acquiring, with a positron emission tomography (PET) scanner having a plurality of rings of detectors, line-of-response events from radioactive decay of an isotope in a patient while the patient is moving at different velocities in the PET scanner; calculating normalization coefficients for the line-of-response events, the calculating being a function of a decay correction efficiency for the isotope and step sizes that vary as a function of time in response to the different velocities; normalizing the line-of-response events; and reconstructing an image of the patient with an output of the normalizing.