发明名称 |
X-RAY CT IMAGE PROCESSING METHOD, X-RAY CT IMAGE PROCESSING PROGRAM, AND X-RAY CT IMAGE DEVICE |
摘要 |
This invention provides an X-ray CT image processing method tha t allows more flexible expression by expressing X-ray absorption coeff icients probabilistically, makes it possible to acquire reconstructed images that are comparable to those obtained by conventional methods b ut involve lower X-ray doses, and can reduce beam-hardening artifacts. A probability distribution for the observation of projected X-rays is set and statistical inference is performed. Said probability distribu tion is expressed in terms of the process of observing a multiple-X-ra y sum resulting from multiple projected X-rays being incident upon a d etector. Bayesian inference in which the expected value of the posteri or distribution is used for statistical inference is performed on the basis of a prior distribution for X-ray absorption coefficients, said prior distribution having parameters for the material and the observat ion process in terms of which the multiple-X-ray sum is expressed. |
申请公布号 |
EP2997900(A4) |
申请公布日期 |
2017.01.04 |
申请号 |
EP20140798390 |
申请日期 |
2014.05.15 |
申请人 |
Kyoto University |
发明人 |
MAEDA, Shinichi;YOSHIKAWA, Daigo;TANAKA, Takumi;ISHII, Shin |
分类号 |
A61B6/03;A61B6/00;G06T11/00 |
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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