Performance evaluation of a parallel-hole collimated detector module for animal SPECT imaging  

作　　者：黄先超 章志明 李道武 唐浩辉 李婷 廖燕飞 刘军辉 王培林 陈研 王英杰 魏龙 单保慈 王宝义 

机构地区：[1]Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences [2]Beijing Engineering Research Center of Radiographic Techniques and Equipment [3]Graduate University of Chinese Academy of Sciences

出　　处：《Chinese Physics C》2011年第12期1162-1165,共4页中国物理C（英文版）

基　　金：Supported by Natural Science Foundation of China(10805049,10775149)

摘　　要：We have built and investigated a detector module for animal SPECT imaging, especially for use in large field of view （FOV） conditions. The module consists of a PMT-based detector and a parallel-hole collimator with an effective area of 80 mm× 80 mm. The detector is composed of a NaI scintillation crystal array coupled to four H8500 position sensitive photomultiplier tubes （PS-PMT）. The intrinsic energy resolution of the detector is 11.5% at 140 keV on average. The planar spatial resolution of the module changes from 2.2 mm to 5.1 mm at different source-to-collimator distances with an unchanged sensitivity of about 34cps/MBq. Additionally, the SPECT Micro Deluxe Phantom imaging was performed with a radius of rotation （ROR） of 40 mm. Using the FBP reconstruction algorithm, a high performance image was obtained, indicating the feasibility of this detector module.We have built and investigated a detector module for animal SPECT imaging, especially for use in large field of view （FOV） conditions. The module consists of a PMT-based detector and a parallel-hole collimator with an effective area of 80 mm× 80 mm. The detector is composed of a NaI scintillation crystal array coupled to four H8500 position sensitive photomultiplier tubes （PS-PMT）. The intrinsic energy resolution of the detector is 11.5% at 140 keV on average. The planar spatial resolution of the module changes from 2.2 mm to 5.1 mm at different source-to-collimator distances with an unchanged sensitivity of about 34cps/MBq. Additionally, the SPECT Micro Deluxe Phantom imaging was performed with a radius of rotation （ROR） of 40 mm. Using the FBP reconstruction algorithm, a high performance image was obtained, indicating the feasibility of this detector module.

关 键 词：animal imaging SPECT parallel-hole collimator 

分 类 号：TH89[机械工程—仪器科学与技术]