TABLE 1

PET Image Reconstruction Parameters for Protocols A and B

ParameterProtocol AProtocol B
AlgorithmOSEMOSEM
Time of flightYesYes
Point-spread functionNoNo
Iterations (n)22
Subsets (n)2121
Postreconstruction filter3-dimensional gaussian, 5 mm FWHMNone
Matrix size200 × 200256 × 256
Pixel size (mm)4.02.0
Slice separation (mm)3.33.3
Scatter correctionSingle-scatter simulationSingle-scatter simulation
Attenuation correctionCT-basedCT-based
Randoms correctionDelayed-event subtractionDelayed-event subtraction