摘要
空间分辨率有四种测试方法：分辨成排圆孔模型测极限分辨率；分辨成排条形模型测极限分辨率；扫描针模计算ＭＴＦ曲线；扫描条形模型计算ＭＴＦ曲线。前二种方法直观、简单，但模体重、体积大，且测量结果有一定主观因素，这两种方法用于日常质量控制为宜。第三种方法能得到完整的ＭＴＦ曲线，但计算过程复杂，本文推荐使用最后一种方法，并简述其原理，认为该方法测量ＭＴＦ曲线简便易行。
To approach the method for testing the space resolution,there are four methods for measurement of the space resolution.1)The limit resolution was measured by means of resolving sets of holes.2)The limit resolution was measured by means of resolving sets of lines.3)Calculate MTF by means of scanning alignment pin.4)Calculate MTF by means of scanning sets of lines.Results: Method 1)2) is direct simply, but phantom is bulky weighty, and also the measures result is subjectively. Method 1)2) are used for daily quality control. Method 3) could have the complete MTF, but the calculated process of method is very complex. This article recommend method 4) and analyze theory. According to our studying,this method is a simple method for measuring MTF.
出处
《CT理论与应用研究（中英文）》
1998年第1期38-42,共5页
Computerized Tomography Theory and Applications
