Tomographic Reconstruction from Fan Beam Geometry Using Radon's Integration Method

Abstract

Tomographic scanners of the parallel beam and fan beam type have differences in the direction of sweep, r vs. ϕ respectively. This leads to different options in the "fill" of the sampling space, which may be important in accurate reconstruction. These differences are denoted in reference to the Radon integrational method of reconstruction. An algorithm using source angle gating of data from a fan beam scanner is given with a reconstruction from a simulation phantom scan which used discrete source and detector apertures with rotation smearing.