发明名称 |
Iterative method and apparatus for x-ray computed tomographic fluoroscopy |
摘要 |
In the present invention, an iterative process is provided for computed tomographic fluoroscopy (CTF) based upon an ordered-subset based algorithm or an adaptation of the row-action expectation maximization (RAEM) formula. This process is applied to reduce metal artifacts in CTF imaging, reduce image noise and provide rapid-image updating suitable for real-time applications. In one embodiment, generation of a projection mask and computation of a relaxation matrix are used to compensate for beam divergence and data incompleteness, and a priori knowledge such as a known image support is used to reduce image reconstruction errors.
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申请公布号 |
US6101236(A) |
申请公布日期 |
2000.08.08 |
申请号 |
US19980165370 |
申请日期 |
1998.10.02 |
申请人 |
UNIVERSITY OF IOWA RESEARCH FOUNDATION |
发明人 |
WANG, GE;SCHWEIGER, GARY D.;VANNIER, MICHAEL W. |
分类号 |
G06T11/00;(IPC1-7):A61B6/03 |
主分类号 |
G06T11/00 |
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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