Algebraic reconstruction techniques for spectral reconstruction in diffuse optical tomography

Journal Article · Mon Dec 01 04:00:00 EST 2008 · Applied Optics

DOI:https://doi.org/10.1364/AO.47.006392· OSTI ID:21175821

Brendel, Bernhard; Ziegler, Ronny; Nielsen, Tim

Reconstruction in diffuse optical tomography (DOT) necessitates solving the diffusion equation, which is nonlinear with respect to the parameters that have to be reconstructed. Currently applied solving methods are based on the linearization of the equation. For spectral three-dimensional reconstruction, the emerging equation system is too large for direct inversion, but the application of iterative methods is feasible. Computational effort and speed of convergence of these iterative methods are crucial since they determine the computation time of the reconstruction. In this paper, the iterative methods algebraic reconstruction technique (ART) and conjugated gradients (CGs) as well as a new modified ART method are investigated for spectral DOT reconstruction. The aim of the modified ART scheme is to speed up the convergence by considering the specific conditions of spectral reconstruction. As a result, it converges much faster to favorable results than conventional ART and CG methods.

• OSTI ID: 21175821
• Journal Information: Applied Optics, Journal Name: Applied Optics Journal Issue: 34 Vol. 47; ISSN 0003-6935; ISSN APOPAI
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BRILLOUIN EFFECT
COMPUTERIZED TOMOGRAPHY
CONVERGENCE
DIFFUSION EQUATIONS
ITERATIVE METHODS
NONLINEAR OPTICS
OPTICAL DISPERSION
OPTICAL FIBERS