Patent ID: 8705822

Claim:
A method for producing an image with a computed tomography (CT) imaging system, the method comprising the steps of: a) acquiring a first helical, projection data set using a first-energy x-ray source traversing a helical trajectory along a longitudinal axis of a subject; b) acquiring a second helical, projection data set using a second-energy x-ray source traversing a helical trajectory along the longitudinal axis of the subject, wherein the first-energy x-ray source and the second-energy x-ray source deliver x-ray energy at differing energy levels; c) transforming the first helical, projection data set into a first non-helical, projection data set; d) transforming the second helical, projection data set into a second non-helical, projection data set; e) registering the first non-helical, projection data set with the second non-helical, data set; and f) reconstructing, from the registered first and second non-helical, projection data sets, at least one image indicative of a basis-material decomposition within the subject.