Noise analysis of LSO-PSAPD PET detector front-end multiplexing circuits

We are designing a 1 mm resolution PET (positron emission tomography) system with over twenty-thousand readout channels. Multiplexing of the PSAPD (position sensitive avalanche photodiode) detectors would simplify the readout electronics and reduce the density of the circuit board design. We used simulations and experiments to study the performance of three front-end circuit configurations, 1) no multiplexing, 2) multiplexing with single-ended …