发明名称 |
Method for statistically reconstructing images from a plurality of transmission measurements having energy diversity and image reconstructor apparatus utilizing the method |
摘要 |
A method for statistically reconstructing images from a plurality of transmission measurements having energy diversity and image reconstructor apparatus utilizing the method are provided. A statistical (maximum-likelihood) method for dual-energy X-ray CT accommodates a wide variety of potential system configurations and measurement noise models. Regularized methods (such as penalized-likelihood or Bayesian estimations) are straightforward extensions. One version of the algorithm monotonically decreases the negative log-likelihood cost function each iteration. An ordered-subsets variation of the algorithm provides a fast and practical version. The method and apparatus provide material characterization and quantitatively accurate CT values in a variety of applications. The method and apparatus provide improved noise/dose properties. |
申请公布号 |
US2003156684(A1) |
申请公布日期 |
2003.08.21 |
申请号 |
US20030368534 |
申请日期 |
2003.02.18 |
申请人 |
FESSLER JEFFREY A. |
发明人 |
FESSLER JEFFREY A. |
分类号 |
G06T5/00;(IPC1-7):H05G1/00 |
主分类号 |
G06T5/00 |
代理机构 |
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地址 |
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