辐射照相系统中转换屏的分辨率研究

在高能X光辐射照相系统中，通常使用闪烁体材料的转换屏将X光转换为可见光进行探测。建立了转换屏空间分辨率的计算模型，模拟了转换屏的空间分辨率随屏的厚度、材料及X光子能量的变化关系，为系统的设计提供了参数。

Study of scintillator resolution in radiography system

X ray is always returned to visible light for detection by scintillator in high energy radiography systems. The system spatial resolution is affected by scintillator thickness, material and energy of the input X photons. This influence is analyzed theoretically and the calculating model is built. For providing the parameters to optimize the design of the system, the relation between the scintillator spatial resolution and the scintillator thickness, material and energy of the input X photon is calculated. The increasing of scintillator thickness will reduce the spatial resolution while the increasing of input X photon energy will raise it. The spatial resolution of BGO is higher than that of CsI:Tl with same thickness.