Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (6): 60402-060402.doi: 10.11889/j.0253-3219.2017.hjs.40.060402


Effect of crystal surface characteristics on the performance of PET detectors

FENG Kai1,2, XU Yue2, BAO Hong2, DENG Xinhan1,2, KUANG Zhonghua1, WANG Xiaohui1, ZHENG Yunfei1, YANG Yongfeng1   

  1. 1 Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;
    2 Guangdong University of Technology, Guangdong 510006, China
  • Received:2017-02-28 Revised:2017-04-05 Online:2017-06-10 Published:2017-06-06
  • About author:10.11889/j.0253-3219.2017.hjs.40.060402
  • Supported by:
    Supported by National Natural Science Foundation of China (No.81527804, No.11575285), Shenzhen Basic Research Project (No.JCYJ-20150630114942310)

Abstract: Background: Positron emission tomography (PET) is the most sensitive and quantitative functional and molecular imaging technique. It was more and more popularly used in modern biomedical research such as animal model of human disease, new drug development and evaluation of new therapies. Purpose: Improving the detector property is the key to increase the performance of the PET scanners. PET detector normally consists of a segmented scintillator array and a photodetector.Methods: In this work the performance of PET detectors consisting of (Lu,Y)2SiO5 (LYSO) arrays with polished and unpolished crystal surface was measured by using both dual-ended and single-ended readout with position sensitive photomultiplier tube. Results: The experimental results showed that both LYSO arrays provided similar flood histogram and energy resolution for dual-ended readout detector, but the unpolished LYSO array provided much better resolution of interaction depth and should be used for dual-ended readout PET detectors. Conclusion: Polished LYSO array provided better flood histogram and energy resolution, and should be used for single-ended readout PET detector.

Key words: PET, LYSO crystal, PET detector, Spatial resolution, Energy resolution

CLC Number: 

  • TL99