Improved dual-energy material discrimination for dual-source CT by means of additional spectral filtration
Improved dual-energy material discrimination for dual-source CT by means of additional spectral filtration
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DOI：
10.1118/1.3083567
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发表时间：
2009-04-01
期刊：
影响因子：
3.8
通讯作者：
McCollough, C. H.
中科院分区：
文献类型：
--
作者：
Primak, A. N.;Ramirez Giraldo, J. C.;McCollough, C. H.
The use of additional spectral filtration for dual-energy (DE) imaging using a dual-source CT (DSCT) system was investigated and its effect on the material-specific DEratio was evaluated for several clinically relevant materials. The x-ray spectra, data acquisition, and reconstruction processes for a DSCT system (Siemens Definition) were simulated using information provided by the system manufacturer, resulting in virtual DE images. The factory-installed filtration for the 80 kV spectrum was left unchanged to avoid any further reductions in tube output, and only the filtration for the high-energy spectrum was modified. Only practical single-element filter materials within the atomic number range of 40
