发明名称 |
METHOD FOR RECONSTRUCTION IN DUAL ENERGY, DUAL SOURCE HELICAL COMPUTED TOMOGRAPHY |
摘要 |
A system and method for the accurate quantitative evaluation of dual-energy computed tomography (CT) projection data that is acquired in a dual-source helical scan includes employing a dual-source z-axis helical interpolation method. The method includes transforming the two helical projection data sets, where corresponding projections of high- and low-energy data sets are shifted with respect to one another by 90 degrees or another angle, into corresponding non-helical projection data sets. A dual-source helical interpolation algorithm allows for projection space dual-energy processing by realigning the high- and low-energy datasets based on the z-axis interpolation. This algorithm may be implemented using a variety of interpolation schemes and can be extended from single slice to multi-slice data acquisitions. Subsequent to the registration of the non-helical projection data sets, projection space processing allows for accurate material quantification and virtual monochromatic images in which beam hardening artifacts have been substantially suppressed.
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申请公布号 |
US2011188725(A1) |
申请公布日期 |
2011.08.04 |
申请号 |
US200913059579 |
申请日期 |
2009.09.02 |
申请人 |
YU LIFENG;MCCOLLOUGH CYNTHIA H |
发明人 |
YU LIFENG;MCCOLLOUGH CYNTHIA H. |
分类号 |
G06K9/00 |
主分类号 |
G06K9/00 |
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