Comparison of Timing Measurement Methods of Dual-Ended Readout Scintillator Array PET Detectors
IEEE TRANSACTIONS ON RADIATION AND PLASMA MEDICAL SCIENCES(2024)
摘要
The main focus of this work is to compare different timing measurement methods of individual silicon photomultiplier (SiPM) arrays and dual-ended readout PET detectors. Two lutetium yttrium oxyorthosilicate (LYSO) crystal arrays with 3.10×3.10×20 mm3 crystals, enhanced specular reflector (ESR), and barium sulfate (BaSO4) reflector and one LYSO crystal array with 1.88×1.88×20 mm3 crystals and BaSO4 reflector with dual-ended read out by 8×8 SiPM arrays of 3×3 mm2 active pixel area were measured. Signals of the SiPM arrays were processed individually using 64 channel PETsys TOFPET2 ASICs designed for time-of-flight PET applications. For the SiPM arrays, an energy square-weighted average timing method using the timings of the fastest 2 SiPM pixels was found to provide the best coincidence timing resolutions (CTRs). For the dual-ended readout detectors, the method of using the energy-weighted average timings of the two SiPM arrays provided the best CTR of 234 ps for the detector using 3.10×3.10×20 mm3 crystals and ESR reflector, 239 ps for the detector using 3.10×3.10×20 mm3 crystals and BaSO4 reflector, and 275 ps for the detector using 1.88×1.88×20 mm3 crystals and BaSO4 reflector for an energy window of 410-610 keV. The dual-ended readout detectors developed in this work provide better CTRs than those of single-ended readout detectors and a high three-dimensional position resolution which can be used in the future to develop whole-body PET scanners to simultaneously achieve uniform high spatial resolution, high sensitivity and high timing resolution.
更多查看译文
关键词
PET detector,dual-ended readout,timing measurement,timing resolution,PETsys ASIC
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要