| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To dynamically control radiation emitted for CT data acquisition to limit exposure to detectors 20 of a CT detector assembly that may be particularly susceptible to saturation during a given data acquisition. <P>SOLUTION: It is recognized that for the size and position of a subject 22, pre-subject filtering 60, 62 and collimating of a radiation beam may be insufficient to completely prevent saturation of the detectors 20. Unusable data of a saturated CT detector is corrected by nearest neighbor correction, off-centered phantom correction, off-centered synthetic data correction, scout data correction, planar radiogram correction and a number of other correction methods. This method and system for CT data correction can thereby be applied with energy discriminating CT systems 10 as well as with conventional CT systems 10 and other multi-energy CT systems 10 such as dual kVp-based systems. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
