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The availability of compact arrays of high speed analog to digital converters and fast field programmable gate arrays allow much of the complex analog signal processing chain in nuclear pulse processing data acquisition to be replaced with digital algorithms. The fully digital approach allows the authors to evaluate APD based PET detectors and Time Of Flight (TOF) capable fast PMTs using the same digital Data AcQuisition (DAQ) system. The authors have developed digital processing algorithms for recording the time, position, and energy from a 511 keV photon interaction with a Lutetium-Oxyortho-Silicate (LSO) crystal array coupled to a Position Sensitive Avalanche PhotoDiode (PSAPD) or to a XP2020 Photonics PMT as the scintillation light photodector.
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