摘要
A compact gamma-ray detector with good spatial resolution for emission computed tomography (E-CT) applications has been developed. The detector is composed of NaI(Tl) scintillation pixels array and Hamamastu R2486-05 PSPMT. Having a pixel size of 2 mm × 2 mm and an overall dimension of 48.2 mm × 48.2mm × 5 mm, it has 484 pixels in a 22×22 matrix. An average spatial resolution of 2.5mm (FWHM) was achieved. The slope of position linearity is constant within 10% in a range of 40mm. After corrections, the average value of differential non-linearity and absolute non-linearity were 0.16mm and 0.535mm respectively, and a 17% at FWHM of total energy resolution for 241Am was obtained.
A compact gamma-ray detector with good spatial resolution for emission computed tomography （E-CT） applications has been developed. The detector is composed of NaI（T1） scintillation pixels array and Hamamastu R2486-05 PSPMT. Having a pixel size of 2 mm×2 mm and an overall dimension of 48.2 mm×48.2mm×5 mm, it has 484 pixels in a 22×22 matrix. An average spatial resolution of 2.5mm （FWHM） was achieved. The slope of position linearity is constant within 10% in a range of 40mm. After corrections, the average value of differential non-linearity and absolute non-linearity were 0.16mm and 0.535mm respectively, and a 17% at FWHM of total energy resolution for ^241Am was obtained.
基金
National Natural Science Foundation of China (No.10275063)
关键词
探测器
闪烁探测
放射线
程序软件
E-CT, Pixels array, PSPMT, Position linearity, Spatial resolution
