发明名称 |
X-ray dual-energy CT reconstruction method |
摘要 |
The present disclosure relates to a self-prior information based X-ray dual-energy CT reconstruction method, which can utilize information inherent in data to provide a prior model, thereby obtaining a reconstructed image with a high quality. The X-ray dual-energy CT reconstruction method according to the present disclosure comprises: (a) rating an energy spectrum and establishing a dual-energy lookup table; (b) collecting high-energy data p H and low-energy data p L of a dual-energy CT imaging system using a detector of the dual-energy CT imaging system; (c) obtaining projection images R 1 and R 2 of scaled images r 1 and r 2 according to the obtained high-energy data p H and low-energy data p L ; (d) reconstructing the scaled image r 2 using a first piece-wise smooth constraint condition and thereby obtaining an electron density image; and (e) reconstructing the scaled image r 1 using a second piece-wise smooth constraint condition and thereby obtaining an equivalent atomic number image. In the present disclosure, the noise in the dual-energy reconstructed image can be effectively prohibited while keeping the resolution by effectively using information inherent in data. |
申请公布号 |
EP2843623(A2) |
申请公布日期 |
2015.03.04 |
申请号 |
EP20140177280 |
申请日期 |
2014.07.16 |
申请人 |
TSINGHUA UNIVERSITY;NUCTECH COMPANY LIMITED |
发明人 |
YUXIANG, XING;SHEN, LE;ZHANG, LI;CHEN, ZHIQIANG;LIANG,LI |
分类号 |
G06T11/00 |
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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