An adaptive CT data acquisition system and technique is presented whereby radiation emitted for CT data acquisition is dynamically controlled to limit exposure to those detectors of a CT detector assembly that may be particularly susceptible to saturation during a given data acquisition. The data acquisition technique recognizes that for a given subject size and position that pre-subject filtering and collimating of a radiation beam may be insufficient to completely prevent detector saturation. Therefore, the present invention includes implementation of a number of CT data correction techniques for correcting otherwise unusable data of a saturated CT detector. These data correction techniques include a nearest neighbor correction, off-centered phantom correction, off-centered synthetic data correction, scout data correction, planar radiogram correction, and a number of others. The invention is applicable with energy discriminating CT systems as well as with conventional CT systems and other multi-energy CT systems, such as dual kVp-based systems.

Method and system of ct data correction
Application Number
Publication Number
Application Date
November 24, 2005
Publication Date
June 7, 2006
Du Yangeng
Wu Xiaoye
Basu Samit
de Man Bruno
Greenberg Lev
Samsonov Dmitry
Drapkin Evgeny
Meirav Oded
Ruimi David
Tkaczyk John
Arenson Jerome S
cheng tianzheng chen jingjun
General Electric
G06T 01/00
G01N 23/04
A61B 06/03