工业CT中一次圆周多次扫描方式及TV(CG)-Block-ART重建算法  

Single Round-Multiple Scanning Method and TV(CG)-Block-ART Reconstruction Algorithm for Industrial CT

作　　者：邹晶[1,2,3] 郑海荣[2,3] 张朋[1] 

机构地区：[1]首都师范大学检测成像实验室,北京100048 [2]中国科学院深圳先进技术研究院医工所劳特伯医学成像研究中心,深圳518055 [3]中国科学院生物医学信息与健康工程学重点实验室,深圳518055

出　　处：《无损检测》2010年第12期926-929,943,共5页Nondestructive Testing

基　　金：国家973基础项目资助(2010CB732600);国家自然基金资助项目(60971131/F010404)

摘　　要：在高能工业CT系统中,为了提高图像的空间分辨率,常在探测器前加装栅格状准直器,导致采样数据出现稀疏的情况。为此采用多次圆周多次扫描的方式,但这又大大增加了扫描时间。为兼顾扫描速度和重建图像质量,提出了一次圆周多次扫描的数据扫描方式并采用相应的重建算法,数值模拟结果表明此方法在保证重建图像质量的同时提高了扫描速度。In order to improve spatial resolution of reconstructed image,grid-shaped collimator usually was preinstalled on detector in high energy X-ray industrial CT system.However,the scanning data acquired under such circumstances was sparse.To solve this problem,multiple round-multiple scanning method was provided,but it greatly reduced the efficiency of data acquisition.Then,a single round-multiple scanning method and the corresponding iteration algorithm which was capable of taking into account scanning efficiency and reconstruction image quality was proposed.Numerical experimental results verified the effectiveness of this method.

关 键 词：工业CT 数据采集方式 图像重建 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TG115.28[自动化与计算机技术—计算机科学与技术]