Jiahua Fan,Naveen Chandra,Andrew Johnson,Jiang Hsieh,Fang Dong,Mary Sue Kulpins,Peter Crandall
申请号：
US12578886
公开号：
US08363917B2
申请日:
2009.10.14
申请国别(地区):
US
年份:
2013
代理人:
摘要：
A CT system includes a generator configured to energize an x-ray source to a first kilovoltage (kVp) and to a second kVp, and a computer that is programmed to acquire a first view dataset with the x-ray source energized to the first kVp and a second view dataset with the x-ray source energized to the second kVp, generate a base correction image using the first view dataset and the second view dataset, and reconstruct a pair of base material images from the first view dataset and from the second view dataset. The computer is also programmed to estimate artifact correlation in the pair of base material images using the base correction image, generate a pair of final base material images and a final monochromatic image, and correct one of the pair of final base material images and the final monochromatic image at a keV value using the estimated artifact correlation.
