极少投影的CT成象研究  

Reconstructing Tomographic Image from Much Less Projections

作　　者：顾本立[1] 陆李[1] 

机构地区：[1]东南大学生物医学工程系

出　　处：《CT理论与应用研究（中英文）》1994年第2期14-17,共4页Computerized Tomography Theory and Applications

摘　　要：用极少投影对受腐蚀的管道进行ＣＴ成象，采用了ＧＰ法，ＡＲＴ法以及新提出的快速几何迭代算法，取得了较好的重建结果。对实验投影数据进行了射束硬化校准和高通滤波预处理，用预处理后的数据反演得到了满意的图象。此法也可适用于由１—２种材料构成的工件无损检测。Reconstructing tomosraphic image from much less projections for the corroded industrial pipe was studied using the method of GP,ART and a new method called faSt geometry iteration technique(FGIT) proposed by authors'The preprocessing of experimental projection signal was carried out to correct beam harden effect and make high pass filter'After that,good results of reeonstructive tomographic image were got from the experimental data using much less projections'These methods also can be used for nondestructive testing other industrial structures made from 1-2 kinds of material

关 键 词：管道 无损检测 CT成象 极少投影 

分 类 号：U173.9[交通运输工程]