发明申请
US20080056549A1 System and Method for Reducing Circular Artifacts in Tomographic Imaging
有权
用于减少断层扫描成像中的圆形伪像的系统和方法
- 专利标题: System and Method for Reducing Circular Artifacts in Tomographic Imaging
- 专利标题(中): 用于减少断层扫描成像中的圆形伪像的系统和方法
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申请号: US11550445申请日: 2006-10-18
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公开(公告)号: US20080056549A1公开(公告)日: 2008-03-06
- 发明人: James J. Hamill , David D. Faul
- 申请人: James J. Hamill , David D. Faul
- 申请人地址: US PA Malvern
- 专利权人: Siemens Medical Solutions USA, Inc.
- 当前专利权人: Siemens Medical Solutions USA, Inc.
- 当前专利权人地址: US PA Malvern
- 主分类号: G06K9/00
- IPC分类号: G06K9/00 ; G06K9/40
摘要:
A method of reducing ring artifacts in tomographic images including providing an original digitized projection measurement comprising a plurality of intensities corresponding to a domain of points on an 2-dimensional grid, operating on said original projection measurement with a filter wherein features of high radial frequency and low angular frequency are attenuated, forming a weighted mixture of said filtered projection measurement and said original projection measurement wherein ring artifacts in said original tomographic image are substantially reduced, and reconstructing the projection measurement to form a tomographic image. Alternatively, a first tomographic image is reconstructed from said original projection measurement, a second tomographic image is reconstructed from said filtered projection measurement, and a weighted mixture is formed from said first tomographic image and said second tomographic image.