1. A method for reconstructing three-dimensional (3D) tomographic images comprising; acquiring a set of pseudo-projection images of at least one object; applying error corrections to the set of pseudo-projection images to produce a set of corrected pseudo-projection images, where the error corrections correct for registration error effects by measuring a center of mass of the at least one object in each projection image, and by correcting for axial registration errors by shifting the at least one object in each pseudo-projection image so that the axial component of the center of mass for the object is aligned to a common axial position in each of the set of corrected pseudo-projection images; and processing the set of corrected pseudo-projection images to produce (3D) tomographic images,