晶体表面特性对PET探测器性能的影响

doi:10.11889/j.0253-3219.2017.hjs.40.060402

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

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles Next Articles

Effect of crystal surface characteristics on the performance of PET detectors

FENG Kai^1,2, XU Yue², BAO Hong², DENG Xinhan^1,2, KUANG Zhonghua¹, WANG Xiaohui¹, ZHENG Yunfei¹, YANG Yongfeng¹

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

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

FENG Kai, XU Yue, BAO Hong, DENG Xinhan, KUANG Zhonghua, WANG Xiaohui, ZHENG Yunfei, YANG Yongfeng. Effect of crystal surface characteristics on the performance of PET detectors[J].Nuclear Techniques, 2017, 40(6): 60402-060402.

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Effect of crystal surface characteristics on the performance of PET detectors

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