发明名称 |
Methods for spectrally calibrating CT imaging apparatus detectors |
摘要 |
A method for calibrating a computed tomographic imaging apparatus having a gantry, a radiation source operable at a plurality of kVp's, and a detector array having a plurality of detector elements includes using a system detection function to estimate signals of each detector element that would have been detected through air and through a given thickness of water to determine estimated datasets. The estimated datasets are used to determine data pair sets each comprising a normalized water projection value and an ideal projection value for each detector element. The method further includes determining and storing a representation of a mapping function of the normalized water projections values to the ideal projection values in a memory of the computed tomographic imaging apparatus as a spectral calibration of the computed tomographic imaging apparatus.
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申请公布号 |
US2005259784(A1) |
申请公布日期 |
2005.11.24 |
申请号 |
US20040850009 |
申请日期 |
2004.05.20 |
申请人 |
WU XIAOYE;BROMBERG NEIL B;KOLKER ALEXANDER;SIMONI PIERO U;TOTH THOMAS L |
发明人 |
WU XIAOYE;BROMBERG NEIL B.;KOLKER ALEXANDER;SIMONI PIERO U.;TOTH THOMAS L. |
分类号 |
A61B6/00;A61B6/03;G01N23/00;G21K1/12;H05G1/60;(IPC1-7):G21K1/12 |
主分类号 |
A61B6/00 |
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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