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Development of SiPM-based Small-animal PET

  • Lee, Jin Hyung ;
  • Lee, Seung-Jae ;
  • Chung, Yong Hyun
  • Received : 2015.10.15
  • Accepted : 2015.10.25
  • Published : 2015.10.31

Abstract

A decreased number of readout method is investigated to provide precise pixel information for small-animal positron emission tomography (PET). Small-animal PET consists of eight modules, and each module is composed of a $6{\times}6$ array of $2{\times}2{\times}20mm^3$ lutetium yttrium orthosilicate (LYSO) crystals optically coupled to a $4{\times}4$ array of $3{\times}3mm^2$ silicon photomultipliers (SiPMs). The number of readout channels is reduced by one-quarter that of the conventional method by applying a simplified row and column matrix algorithm. The performance of the PET system and detector module was evaluated with Geant4 Application for Emission Tomography (GATE) 6.1 and DETECT2000 simulations. In the results, all pixels of the $6{\times}6$ LYSO array were decoded well, and the spatial resolution and sensitivity, respectively, of the PET system were 1.75 mm and 4.6% (@ center of field of view, energy window: 350-650 keV).

Keywords

SiPM;Small-animal PET;Algorithm;GATE simulation;DETECT2000 simulation

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Acknowledgement

Supported by : National Research Foundation (NRF)