@misc{oai:repo.qst.go.jp:00077150,
 author = {Kang, Hangyu and Yamaya, Taiga and Bae Ko, Guen and Sung Lee, Jae and Hyun Song, Seong and Been Han, Young and Jong Hong, Seong and Kang, Hangyu and Yamaya, Taiga},
 month = {Oct},
 note = {In a previous study, we proposed a silicon photomultiplier-based (SiPM-based) dual-ended readout positron emission tomography (PET) detector that used a mean time method to achieve excellent time-of-flight (TOF) and depth-of-interaction (DOI) resolution simultaneously. However, the coincidence timing resolution (CTR) was greater than 300 ps since the crystal surface and reflector type were not optimized. The aim of this study was to investigate the optimal crystal surface treatment and reflector material to achieve a sub-200 ps CTR and sub-3 mm DOI resolution with a dual-ended readout PET detector using an LYSO crystal (2.9×2.9×20 mm3). The scintillation light inside the LYSO crystal was read out by two SiPMs (S11064-050P, Hamamatsu Photonics, Japan) using the dual-ended readout method. The CTR and DOI resolution were measured with two different crystal surfaces (polished and saw-cut) and three different reflector material scenarios of ESR (Air), ESR (Optical grease), and Teflon. We digitized the timing and energy signals by using a V775N TDC module (35 ps/bit) and V965 QDC module, respectively. The combination of the saw-cut LYSO crystal and ESR (Air) resulted in the best CTR (190 ± 4 ps) and DOI resolution (2.9 ± 0.2 mm) with the dual-ended readout configuration. We concluded the dual-ended readout method in combination with the saw-cut crystal and ESR (Air) reflector can provide a sub-200 ps CTR and sub-3.0 mm DOI resolution simultaneously., 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference},
 title = {Optimization of Crystal Surface Treatment and Reflector for SiPM-Based Dual-Ended Readout TOF-DOI PET Detector},
 year = {2019}
}