Study of performance of small gamma camera consisting of crystal pixel array and position sensitive photomultiplier tube  

作　　者：ZHU Jie LIU Shi-Tao LEI Xiao-Wen YAN Tian-Xin XU Zi-Zong WANG Zhao-Min 

机构地区：[1]Department of Modern Physics, University of Science and Technology of China, Hefei 230026

出　　处：《Nuclear Science and Techniques》2005年第4期238-243,共6页核技术（英文）

基　　金：Supported by National Foundation of Natural Sciences of China (10275063)

摘　　要：The performance of gamma camera with NaI(Tl) array coupled with position sensitive photomultiplier tube (PSPMT) R2486 has been studied. The pixel size of NaI(Tl) crystal is 2mm×2mm and the overall dimension of the array is 48.2mm×48.2mm×5mm. There are 484 pixels in a 22×22 matrix. Because each pixel can produce a much focused light spot and restrict the spread of photons, position resolution of the gamma camera is mainly determined by pixel size. It is shown that crystal array pixel can reduce shrinkage effect and improve intrinsic position resolution greatly via restricting the spread of photons. Experimental results demonstrate that its position resolution and linearity are much improved comparing with the gamma camera using planar crystals coupled with PSPMT.The performance of gamma camera with NaI（Tl） array coupled with position sensitive photomultiplier tube （PSPMT） R2486 has been studied. The pixel size of NaI（Tl） crystal is 2mm×2mm and the overall dimension of the array is 48.2mm×48.2mm×Smm. There are 484 pixels in a 22×22 matrix. Because each pixel can produce a much focused light spot and restrict the spread of photons, position resolution of the gamma camera is mainly determined by pixel size. It is shown that crystal array pixel can reduce shrinkage effect and improve intrinsic position resolution greatly via restricting the spread of photons. Experimental results demonstrate that its position resolution and linearity are much improved comparing with the gamma camera using planar crystals coupled with PSPMT.

关 键 词：光电倍增器 像素 照相机 PSPMT 线性关系 

分 类 号：TN152[电子电信—物理电子学]