Axial Cone Beam Reconstruction with Asymptotic Trajectory Extrapolation Implemented by 3-D Weighting Scheme

Axial scan along circular trajectory has been the most desirable in clinical and preclinical applications.However,due to the violation of the data sufficiency condition,the reconstruction accuracy of axial scan deteriorates rapidly with increasing detector z-dimension.A number of algorithms have been proposed thus far to improve the reconstruction accuracy.It is well understood that,the larger the radius of circular trajectory,the more accurate the reconstruction.Ultimately,the reconstruction becomes accura...