计算机工程与应用 ›› 2008, Vol. 44 ›› Issue (2): 202-204.

• 工程与应用 • 上一篇    下一篇

基于窄角扇束CT多次扫描的局部重建算法

邹永宁,王 珏,蔡玉芳   

  1. 重庆大学 ICT研究中心,重庆 400044
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-01-11 发布日期:2008-01-11
  • 通讯作者: 邹永宁

Local reconstruction based on narrow fan-beam CT multi-scan

ZOU Yong-ning,WANG Jue,CAI Yu-fang   

  1. ICT Research Center,Chongqing University,Chongqing 400044,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-01-11 Published:2008-01-11
  • Contact: ZOU Yong-ning

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。

关键词: CT, 局部重建, 窄角扇束, 多次扫描

Abstract: Introduce local scan method of narrow fan-beam industrial CT which is implemented through translation and rotation of source-detector.CT multi-scan 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 high-resolution image;it improves efficiency of detection and acquires high quality local image,while requiring much less computation.

Key words: CT, local reconstruction, narrow fan-beam, multi-scan