Study Of Lutetium-Based Scintillators For Pet System Design With 100-Ps Coincidence Time Resolution
2019 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (NSS/MIC)(2019)
摘要
Here, we evaluated fast Lu-based scintillation crystals for construction of a PET system with 100-ps coincidence time resolution (CTR). Four 3x3x10 mm(3) LGSO crystals with decay times ranging from 33-38 ns, and 3x3x10 mm(3) and 1.9x1.9x10 mm(3) LSO crystals with decay times of 34-36 ns were tested. In order to achieve excellent CTR, we used a novel sidereadout detector configuration where the long face of each crystal rod is coupled to multiple photo sensors. The light output, decay time, and energy performance were measured with a fast PMT. CTR was measured with crystals coupled side-on to SiPMs and waveforms were digitally sampled. In all of these studies we achieved <= 100 ps CTR.
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关键词
multiple photosensors,crystal rod,LSO crystals,decay time,Lu-based scintillation crystals,PET system design,lutetium-based scintillators
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