单位：[1]Univ Sci & Technol Beijing, Sch Automat & Elect Engn, Beijing Engn Res Ctr Ind Spectrum Imaging, Beijing 100083, Peoples R China[2]China Japan Friendship Hosp, Dept Radiat Oncol, Beijing 100029, Peoples R China[3]Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China
出处：
ISSN：
摘要：
Crystal identification is a critical procedure for PET systems. In this paper, we proposed a crystal identification method for a dual-layer-offset LYSO based animal PET system via Lu-176 background radiation. Single event data of Lutetium background radiation were acquired in list-mode for one hour to generate a single photon flood histogram (SPH). Coincidence events were retrieved from the same data using time information to generate a coincidence flood histogram (CFH). The coincidence flood map was employed to identify the peaks of the inner layer responses using average peaks calculation and mean shift algorithm. The response of the inner layer was removed from the SPH using the CFH and then the peaks of the outer layer were also identified using mean-shift algorithm. At last, the crystal position map was generated using these peaks with the distance criteria. Results show that the proposed method can be employed for the dual-layer offset PET system to implement crystal identification instead of using external radiation sources.
基金：
National Natural Science Foundation of China [11605008, 11505300, 61402387]; National Key R&D Program of China [2016YFC01054]; National "Twelve Five-Year" Plan for Science & Technology Support Program [2015BAI42H00]; Fundamental Research Funds for the Central Universities [FRF-TP-15-114A1]; Novel Medical Inc.
语种：
外文
WOS：
第一作者：
第一作者单位：[1]Univ Sci & Technol Beijing, Sch Automat & Elect Engn, Beijing Engn Res Ctr Ind Spectrum Imaging, Beijing 100083, Peoples R China
通讯作者：
推荐引用方式(GB/T 7714)：
Wei Qingyang,Dai Tiantian,Ma Tianyu,et al.Crystal identification for a dual-layer-offset LYSO based PET system via Lu-176 background radiation[J].2017 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (NSS/MIC).2017,
APA：
Wei, Qingyang,Dai, Tiantian,Ma, Tianyu,Xu, Tianpeng,Gu, Yu&Liu, Yaqiang.(2017).Crystal identification for a dual-layer-offset LYSO based PET system via Lu-176 background radiation.2017 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (NSS/MIC),,
MLA：
Wei, Qingyang,et al."Crystal identification for a dual-layer-offset LYSO based PET system via Lu-176 background radiation".2017 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (NSS/MIC) .(2017)
