Influence of Fast Reconstruction Algorithms on Spatial Resolution of Optical Diffuse Tomography by Photon Average Trajectories Method

摘要

The influence of three reconstruction algorithms (discrete iterative algebraic algorithm LSQR and filtered backprojection algorithms of Radon and Vainberg) on spatial resolution of Optical Diffuse Tomography (ODT) by Photon Average Trajectories (PAT) method was investigated. The resolution was estimated using the model of spatially invariant linear filter by the convenient procedure usually used in CT. The resolution of absorbing inhomogeneities of model objects is shown to go for a theoretical limit of PAT method and the algorithms considered appears to reconstruct optical diffuse images without complementary limitations on spatial resolution.