γ相机调制传递函数的测试  

Test Modulation Transfer Function of Gamma Camera

作　　者：李洪斌[1] 麦祖荫[1] 黄欣波 苗颖[1] 朱国泓[1] 刘辉[2] 

机构地区：[1]中日友好医院 [2]北京市遥感信息研究所

出　　处：《核电子学与探测技术》1989年第4期215-219,共5页Nuclear Electronics & Detection Technology

摘　　要：本文介绍了运用调制传递函数测试了相机空间系统分辨率的原理、方法、结果与分析,为广大用户在设备验收检测、维修调试和质量控制等方面提供了一种较好的评价方法。The principle, method and result of determining the spatial system resolution of gamma camera by using the modulation transfer function(MTF) method was introduced meticulously in this paper, Comparing with the traditional FWHM method, MTF method is more accurate and more objective. Our result of FWHM index was as good as the criterion of NEMA (National Electrical Manufacturers Association) in USA, because we use the midget point source(<φ=0.5mm).So this method can supply a new kind of more effective evaluation method for users.

关 键 词：Γ相机 调制传递函数 付里叶变换 

分 类 号：TH773[机械工程—仪器科学与技术]