Investigation of the time performance of a LYSO array for TOF-PET  

作　　者：刘军辉 程金星 徐炯辉 成枫锋 李道武 章志明 王宝义 魏龙 

机构地区：[1]Institute of High Energy Physics [2]Beijing Engineering Research Center of Radiographic Techniques and Equipment [3]Qinshan Nuclear Power Station [4]Key Lab of Beam Technology and Material Modification of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University [5]Beijing Radiation Center

出　　处：《Chinese Physics C》2015年第12期103-108,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(10775149,10805049);the Fundamental Research Funds for the Central Universities(2013NT10)

摘　　要：Positron Emission Tomography （PET） using time-of-flight information, which can greatly improve the quality of the reconstructed image, has recently become an exciting topic. In this work, 3.2 mm×3.2 min×25 mm finger-like LYSO crystals were used to make a 5×5 array, coupled to the Hamamatsu H8500 photomultiplier tube （PMT） as a detector. A fast leading-edge discriminator was designed for the LYSO-H8500 detector. Average coinci- dence time resolution FWHM of 330 ps was obtained for the LYSO detector with a reference BaF2 detector, whose time resolution for 511 keV γ-rays was FWHM 150 ps. Time resolution FWHM of 294 ps was calculated for the LYSO detector, and coincidence time resolution of FHWM 415 ps can be expected for two identical LYSO detectors.Positron Emission Tomography （PET） using time-of-flight information, which can greatly improve the quality of the reconstructed image, has recently become an exciting topic. In this work, 3.2 mm×3.2 min×25 mm finger-like LYSO crystals were used to make a 5×5 array, coupled to the Hamamatsu H8500 photomultiplier tube （PMT） as a detector. A fast leading-edge discriminator was designed for the LYSO-H8500 detector. Average coinci- dence time resolution FWHM of 330 ps was obtained for the LYSO detector with a reference BaF2 detector, whose time resolution for 511 keV γ-rays was FWHM 150 ps. Time resolution FWHM of 294 ps was calculated for the LYSO detector, and coincidence time resolution of FHWM 415 ps can be expected for two identical LYSO detectors.

关 键 词：Time-of-Flight PET PS-PMT LYSO leading-edge discriminator 

分 类 号：TN152[电子电信—物理电子学]