原子能科学技术2011，Vol.45Issue(1)：97-101,5.
用于In-Beam TOF-PET的时间校正系统
Time Rectification System for In-Beam TOF-PET
摘要
Abstract
A time rectification system for a In-Beam TOF-PET was described. It consists of a pair of BaF2 (φ40 mm × 45 mm) crystals coupled to Philips photomultipliers XP2020Q and a time coincidence electronic system using standard NIM modules. The best coincidence timing resolution of the system for pairs of 511 keV gamma rays is 576 ps. Some factors affecting the time resolution were primarily discussed, such as the types of photomultiplier tubes (PMT), the model of signal readout, the effects of different discriminators and timing amplifiers. The experiment results show that the signal read from the PMT dynode can get the optimum resolution; the PMT types, especiallythe rise time and electronic transmit time greatly affect the system performance. The shorter the rise time and electronic transmit time for the PMTs is, the better the timing performance is. The system timing performance is also related to the electronic combination.关键词
飞行时间/湮灭/符合时间分辨/氟化钡/飞行时间正电子发射断层扫描仪分类
能源科技引用本文复制引用
陈金达,孔洁,叶瑞平,王建松,张雪荧,郭忠言,徐瑚珊,陈若富,胡正国,唐彬,武大鹏,岳珂,于玉洪,章学恒..用于In-Beam TOF-PET的时间校正系统[J].原子能科学技术,2011,45(1):97-101,5.基金项目
国家自然科学基金资助项目(10305015,10475098) （10305015,10475098）
中国科学院知识创新工程重大项目资助((0701050YZD) （(0701050YZD）
中国科学院西部之光资助项目(0801010XBB) （0801010XBB）
