发明名称 |
Method of and system for X-ray spectral correction in multi-energy computed tomography |
摘要 |
A method of and a system for spectral correction in multi-energy computed tomography are provided to correct reconstructed images, including high-energy CT images and Z (effective atomic number) images, for spectral variations, which include time variations on a scanner due to HVPS drift and scanner to scanner variations due to the beamline component differences. The method uses a copper filter mounted on the detector array for tracking the spectral changes. The method comprises: generating copper ratios; computing working air tables; calculating scales and offsets; and correcting high-energy CT images and Z images using calculated scales and offsets. The method further includes an off-line calibration procedure to generate necessary parameters for the online correction.
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申请公布号 |
US2006023844(A1) |
申请公布日期 |
2006.02.02 |
申请号 |
US20040899775 |
申请日期 |
2004.07.27 |
申请人 |
NAIDU RAM;YING ZHENGRONG;SUBRAMANIAN CHITRA;SIMANOVSKY SERGEY;CRAWFORD CARL R |
发明人 |
NAIDU RAM;YING ZHENGRONG;SUBRAMANIAN CHITRA;SIMANOVSKY SERGEY;CRAWFORD CARL R. |
分类号 |
H05G1/00 |
主分类号 |
H05G1/00 |
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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