Patent ID: 7801266

Claim:
A method for providing scattered radiation correction in a computed tomography system having a radiation source and a large-area multi-row detector, comprising: emitting radiation from the radiation source; scanning an object from a plurality of projection angles by the radiation; measuring an attenuation of the radiation; generating initial projection data p T for the scanning using the measured attenuation; applying first and second functions in a single step to the projection data to provide corrected projection data p* and reconstructing a tomographic view by postprocessing the corrected projection data wherein the first function provides a beam hardening correction and the second function provides a scattered radiation correction, wherein: the corrected projection data p*=p T +ρ·δ a with ρ=1+1/δ a log(1+S/P a ) thereby combining the first and second functions to effect both the beam hardening correction and the scattered radiation correction, and wherein δ a is a hardening correction term that effects the beam hardening correction, S is a standardized scattered radiation distribution, and P a is a standardized primary radiation with hardening but without scattered radiation, and ρ is an amplification factor for a radiation scatter correction.