Development of an optimised LSO/LuYAP phoswich detector head for the ClearPET camera
Development of an optimised LSO/LuYAP phoswich detector head for the ClearPET camera
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为 ClearPET 相机开发优化的 LSO/LuYAP phoswich 探测器头
DOI：
10.1109/nssmic.2004.1462749
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
C. Morel
中科院分区：
文献类型：
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作者：
J. Mosset;O. Devroede;M. Krieguer;M. Rey;J. Vieira;J. Jung;C. Kuntner;M. Streun;K. Ziemons;E. Auffray;P. Sempere;P. Lecoq;P. Bruyndonckx;J. Loude;S. Tavernier;C. Morel
本文介绍了为ClearPET小动物PET扫描仪演示器开发的LSO/LuYAP光电探测器头。探测器头部由8/spl倍/8 LSO和LuYAP晶体阵列的双层耦合到多通道光电倍增管（Hamamatsu R7600-M64）组成。LSO/LuYAP光收集的均衡是通过在LSO上使用20-35 nm的薄铝沉积对LSO闪烁光的部分衰减和在30至60 /spl℃之间适当的光敏头温度调节来实现的。在511 keV时，光导头像素的典型FWHM能量分辨率为LSO的（28/spl plusmn/2）%和LuYAP的（25/spl plusmn/2）%。与LuYAP相比，LSO晶体识别效率优于98%。六个探测器模块安装在一个旋转的龙门架上。轴向和切向空间分辨率被测量到距离扫描仪轴4厘米，并与使用GATE的蒙特卡罗模拟进行比较。FWHM空间分辨率范围从轴上的1.3 mm到距轴4cm处的2.6 mm。
The paper describes the LSO/LuYAP phoswich detector head developed for the ClearPET small animal PET scanner demonstrator that is under construction within the Crystal Clear Collaboration. The detector head consists of a dual layer of 8/spl times/8 LSO and LuYAP crystal arrays coupled to a multi-channel photomultiplier tube (Hamamatsu R7600-M64). Equalisation of the LSO/LuYAP light collection is obtained through partial attenuation of the LSO scintillation light using a thin aluminium deposit of 20-35 nm on LSO and appropriate temperature regulation of the phoswich head between 30 to 60 /spl deg/C. At 511 keV, typical FWHM energy resolutions of the pixels of a phoswich head amounts to (28/spl plusmn/2)% for LSO and (25/spl plusmn/2)% for LuYAP. The LSO versus LuYAP crystal identification efficiency is better than 98%. Six detector modules have been mounted on a rotating gantry. Axial and tangential spatial resolutions were measured up to 4 cm from the scanner axis and compared to Monte Carlo simulations using GATE. FWHM spatial resolution ranges from 1.3 mm on axis to 2.6 mm at 4 cm from the axis.