a parallel reconstruction scheme in fluorescence tomography based on contrast of independent inversed absorption properties
;Xiaolei Song;Ji Yi;Jing Bai
Chemistry, an Asian journal2006Vol. 2006pp. -
147
song2006internationala
Abstract
Based on an independent forward model in fluorescent tomography, a
parallel reconstructed scheme for inhomogeneous mediums with unknown absorption
property is proposed in this paper. The method considers the two diffusion equations
as separately describing the propagation of excited light in tissues with and without
fluorescent probes inside. Then the concentration of fluorophores is obtained directly
through the difference between two estimations of absorption coefficient which can be
parallel inversed. In this way, the multiparameter estimation problem in fluorescent
tomography is transformed into two independent single-coefficient determined
schemes of diffusion optical tomography (DOT). Any algorithms proved to be
efficient and effective in DOT can be directly applied here. In this study the
absorption property is estimated from the independent diffusion equations by a
gradient-based optimization method with finite element method (FEM) solving the
forward model. Simulation results of three representative occasions show that the
reconstructed method can well estimate fluorescent property and tissue absorption
distribution.