TY - GEN
T1 - Noise analysis of LSO-PSAPD PET detector front-end multiplexing circuits
AU - Lau, Frances W.Y.
AU - Olcott, Peter D.
AU - Horowitz, Mark A.
AU - Peng, Hao
AU - Levin, Craig S.
PY - 2007
Y1 - 2007
N2 - We are designing a 1mm3 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 preamplifiers, and 3) multiplexing with differential preamplifiers, by evaluating their energy resolution and crystal identification ability. With single-ended multiplexing, there is no degradation in energy resolution but there is some degradation in crystal identification. With the novel differential multiplexing scheme presented in this paper, in simulation, there is less than 0.1dB degradation in energy resolution and no significant degradation in crystal identification. We also present a pseudo-differential technique which can be used when differential preamplifiers are not available, which we found gives a slight improvement over single-ended multiplexing.
AB - We are designing a 1mm3 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 preamplifiers, and 3) multiplexing with differential preamplifiers, by evaluating their energy resolution and crystal identification ability. With single-ended multiplexing, there is no degradation in energy resolution but there is some degradation in crystal identification. With the novel differential multiplexing scheme presented in this paper, in simulation, there is less than 0.1dB degradation in energy resolution and no significant degradation in crystal identification. We also present a pseudo-differential technique which can be used when differential preamplifiers are not available, which we found gives a slight improvement over single-ended multiplexing.
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U2 - 10.1109/NSSMIC.2007.4436824
DO - 10.1109/NSSMIC.2007.4436824
M3 - Conference contribution
AN - SCOPUS:48349084079
SN - 1424409233
SN - 9781424409235
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 3212
EP - 3219
BT - 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
T2 - 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
Y2 - 27 October 2007 through 3 November 2007
ER -