发明名称 |
Reprojection and backprojection methods and algorithms for implementation thereof |
摘要 |
Methods for projecting and backprojecting rays with respect to pixels/detector bins to attenuate/eliminate high-frequency artifacts, are disclosed. The first two methods are adaptations of pixel-driven and ray-driven linear interpolation techniques respectively. In these techniques, the window or shadow of each pixel/bin is dynamically adjusted and projected onto the detector bin/pixel to eliminate gaps between the shadows. This allows the effect of each pixel on a given detector bin (or vice versa) to be appropriately weighted. A third is a distance-driven technique wherein the transitions of the pixels and the detector bins are respectively projected onto a common axis. This allows a determination of the contribution of each of the pixels/bins for each of the bins/pixels with lower computation time and improved artifact free images.
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申请公布号 |
US6724856(B2) |
申请公布日期 |
2004.04.20 |
申请号 |
US20020121867 |
申请日期 |
2002.04.15 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
DE MAN BRUNO KRISTIAAN BERNARD;BASU SAMIT KUMAR |
分类号 |
A61B6/03;G06T1/00;G06T11/00;(IPC1-7):G01N23/083 |
主分类号 |
A61B6/03 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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