工业CT中MTF曲线测量的ASTM方法  

The ASTM Method of MTF Measurement in Industrial Computed Tomography

作　　者：刘力[1] 张英平[1] 

机构地区：[1]中国科学院高能物理研究所,北京100049

出　　处：《无损检测》2007年第7期399-401,共3页Nondestructive Testing

基　　金：中国科学院创新基金资助(KJCX1-SW-08)

摘　　要：介绍了美国ASTM标准中的工业CT的MTF曲线测量方法。用该方法对一台X光工业CT进行了MTF实验测量与计算,获得其MTF曲线,对其中的算法进行了改进并对计算结果进行了讨论。试验结果表明,该方法具有一定优点,可在工业CT整机性能测试时参考使用。A method to measure the modulation transfer function（MTF） suggested by ASTM standard was introduced and applied in the practical testing of an industrial X-ray CT. By using disc phantoms in the tomography scan, the MTF was obtained under certain acquisition conditions. The advantage of the method and some modified computing technical details were introduced and illustrated, the results were demonstrated and discussed. This method can be used in the performance test of the industrial CT.

关 键 词：工业CT ASTM标准 调制传输函数 

分 类 号：TG115.28[金属学及工艺—物理冶金] R814.42[金属学及工艺—金属学]