A Simulation Study on Two Readout Methods of a Monolithic Scintillator Ring PET

Discrete crystal scintillator arrays are widely used in preclinical PET. The crystal size determines the spatial resolution of PET systems. We simulated and evaluated two preclinical PET systems consisting of a monolithic ring based on previous study(MSR) in GATE with different readout methods: Dual-ended readout and Inner-surface readout. The Center-of-Gravity method and neural network algorithm were used to decode interaction positions of single photons and performances of both PET systems were evaluated.