Abstract
Cone-beam (CB) acquisition is increasingly used for truly
three-dimensional X-ray computerized tomography (CT). However,
tomographic reconstruction from data collected along a circular
trajectory with the popular Feldkamp algorithm is known to produce the
so-called CB artifacts. These artifacts result from the
incompleteness of the source trajectory and the resulting missing
data in the Radon space increasing with the distance to the plane
containing the source orbit. In the context of the development of
integrated PET/CT microscanners, we introduced a novel
off-centered circular CT cone-beam geometry. We proposed a
generalized Feldkamp formula (