小动物PET成像用LYSO闪烁晶体阵列研究  

Study on LYSO Scintillation Crystal Array for Small Animal PET Applications

作　　者：尹红[1] 徐扬[1] 李德辉[1] 王佳[1] 龙勇[1] 胡吉海[1] 付昌禄[1] 蒋春健[1] 

机构地区：[1]中国电子科技集团公司第26研究所,重庆400060

出　　处：《压电与声光》2014年第3期406-408,411,共4页Piezoelectrics & Acoustooptics

摘　　要：小动物正电子发射断层技术(PET)成像较人体PET成像,对空间分辨率和灵敏度提出了更高的要求,进而促进了小动物PET用闪烁阵列制备工艺的发展。硅酸钇镥(LYSO)晶体具有高密度,高有效原子系数,响应时间短等优点,是一种极具发展潜力的新型闪烁晶体材料。该文提出一种以LYSO闪烁晶体阵列的制作方法,采用提拉法实现大尺寸闪烁晶体LYSO的生长;运用化学机械抛光法对切割后晶条进行全局平坦化抛光处理;利用自制高精度夹具组装单根晶条至阵列形式,最终制作成可应用于小动物PET的LYSO闪烁晶体阵列。Comparing with human body PET imaging, the small animal PET imaging requires higher spatial resolution and sensitivity, thus it has promoted the development of scintillation array preparation process. LYSO crystal is considered to be the best scintillator nowadays with most comprehensive properties, including rapid responding time, high density and effective atomic number etc. This paper proposes a production process of LYSO scintillator array which can achieve large-size LYSO scintillation crystal growth using Czochralski method and polish the crystal pieces by utilizing chemical mechanical polishing method. Ultimately the LYSO scintillator array for small animal PET applications can be manufactured by using the homemade fixture with high precision.

关 键 词：小动物正电子发射断层技术(PET) 硅酸钇镥(LYSO)闪烁晶体 化学机械抛光 晶体阵列加工 

分 类 号：TN804[电子电信—信息与通信工程]