摘要
介绍了窄角扇束工业CT的局部扫描方法,通过源与探测器的平移加旋转实现扫描;研究了CT多次扫描的局部重建算法,从粗略扫描重建的低分辨率图像中圈定感兴趣区域,再进行小步距扫描,重建出高分辨率的图像;提高了检测效率并且只需要更少的时间就可获取高质量的局部图像。
Introduce local scan method of narrow fan-beam industrial CT which is implemented through translation and rotation of source-deteetor.CT muhi-sean local reconstruction algorithm is also provided.Firstly Region Of Interest （ROI） is determined from low-resolution image which is reconstructed by coarse scan,secondly scan the ROI by small step and reconstruct highresolution image;it improves efficiency of detection and acquires high quality local image,while requiring much less computation.
出处
《计算机工程与应用》
CSCD
北大核心
2008年第2期202-204,共3页
Computer Engineering and Applications
基金
国家高技术研究发展计划( 863)( the National High- Tech Research and Development Plan of China under Grant No.2006AA04Z104)
重庆市科技计划重点攻关项目( No.CSTC2006AB3027) 。
关键词
CT
局部重建
窄角扇束
多次扫描
CT
local reconstruction
narrow fan-beam
multi-scan
