A new method to determine the center of rotation shift in 2D-CT scanning system using image cross correlation
文献类型：期刊论文
| 作者 | Yang, Min1; Gao, Haidong1; Li, Xingdong2; Meng, Fanyong3; Wei, Dongbo1 |
| 刊名 | NDT & E INTERNATIONAL
 |
| 出版日期 | 2012-03-01 |
| 卷号 | 46期号:0页码:48-54 |
| 关键词 | Computed tomography Center of rotation Image cross correlation Artifacts |
| ISSN号 | 0963-8695 |
| 通讯作者 | Yang, M |
| 英文摘要 | Center of rotation (COR) is one of the most important factors that affect the image quality of CT system. In this paper we propose a new method that is based on image cross correlation to accurately measure the shift of COR in 2D-CT (Two Dimensional Computed Tomography) system. In this method, we firstly rebin the fan-beam sinogram to parallel beam sinogram. Based on the symmetry characteristic of two projections that are 180 opposed to one another in the parallel beam sinogram, we then divide the rebinned sinogram equally into two sub-sinograms along rotating angle direction. After that we flip the second sub-sinogram in right direction, and apply the cross correlation operation to the first sub-sinogram and the flipped sub-sinogram to get the shift of COR. This method does not need the calibration sample, and just uses the sinogram of the scanned slice to calculate the shift of COR directly. The experimental results prove that this method is of high accuracy and anti-noise ability and is easy to implement. (C) 2011 Published by Elsevier Ltd. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Materials Science, Characterization & Testing |
| 研究领域[WOS] | Materials Science |
| 关键词[WOS] | COMPUTED-TOMOGRAPHY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000300547800007 |
| 公开日期 | 2013-10-26 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/4292]  |
| 专题 | 过程工程研究所_多相复杂系统国家重点实验室 |
| 作者单位 | 1.Beijing Univ Aeronaut & Astronaut, Sch Mech Engn & Automat, Beijing 100191, Peoples R China 2.Natl Inst Metrol, Div Metrol Ionizing Radiat & Med, Beijing 100013, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Min,Gao, Haidong,Li, Xingdong,et al. A new method to determine the center of rotation shift in 2D-CT scanning system using image cross correlation[J]. NDT & E INTERNATIONAL,2012,46(0):48-54. |
| APA | Yang, Min,Gao, Haidong,Li, Xingdong,Meng, Fanyong,&Wei, Dongbo.(2012).A new method to determine the center of rotation shift in 2D-CT scanning system using image cross correlation.NDT & E INTERNATIONAL,46(0),48-54. |
| MLA | Yang, Min,et al."A new method to determine the center of rotation shift in 2D-CT scanning system using image cross correlation".NDT & E INTERNATIONAL 46.0(2012):48-54. |
入库方式： OAI收割
来源：过程工程研究所
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