Abstract
A decreased number of readout method is investigated here to provide precise pixel information for small-animal positron emission tomography (PET). Small-animal PET consists of eight modules, each being composed of a 3 × 3 array of 2 mm × 2 mm × 20 mm lutetium yttrium orthosilicate (LYSO) crystals optically coupled to a 2 × 2 array of 3 mm × 3 mm silicon photomultipliers (SiPMs). The number of readout channels is reduced by one-quarter that of the conventional method by applying a simplified pixel-determination algorithm. The performances of the PET system and detector module were evaluated with experimental verifications. In the results, all pixels of the 3 × 3 LYSO array were decoded well, and the performances of the PET detector module were measured.
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