RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Multi-frequency diffuse optical tomography

Auteur(s) / Author(s)

INTES Xavier (1 2) ; CHANCE Britton (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Biophysics and Biochemistry, University of Pennsylvania, Philadelphia, PA 19104, ETATS-UNIS
(2) Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, ETATS-UNIS

Résumé / Abstract

The performance of diffuse optical tomography (DOT) is investigated when multi-modulation frequencies are used simultaneously in the inverse problem in order to cast the forward model. The forward model used was based on the first-order Rytov approximation of the diffusion equation. Numerical measurements were generated with a finite difference approach for configurations relevant to breast optical mammography. The impact of various frequency-set characteristics was evaluated. Furthermore, the effect of sensitivity matrix preconditioning was investigated. The criteria underlying this study were based on a 'singular value analysis' and parameter cross-talk between absorption and scattering reconstructions. It had been shown that preconditioning the matrix was necessary to provide accurate results and an even distribution of frequencies within the larger bound. Furthermore, correlating the different criterions used demonstrated that analysis based on optimization of condition number alone was providing misleading results.

Revue / Journal Title

Journal of modern optics    ISSN  0950-0340   CODEN JMOPEW 

Source / Source

2005, vol. 52, no15, pp. 2139-2159 [21 page(s) (article)] (48 ref.)

Langue / Language

Anglais

Editeur / Publisher

Taylor & Francis, Abingdon, ROYAUME-UNI  (1987) (Revue)

Mots-clés anglais / English Keywords

Theoretical study

;

Optimization method

;

Singular value

;

Optical crosstalk

;

Finite difference method

;

Diffusion equation

;

Inverse problems

;

Diffuse optical imaging

;

Tomography

;

Mots-clés français / French Keywords

Etude théorique

;

Méthode optimisation

;

Valeur singulière

;

Diaphonie optique

;

Méthode différence finie

;

Equation diffusion

;

Problème inverse

;

Imagerie optique milieu diffusant

;

Tomographie

;

Mots-clés espagnols / Spanish Keywords

Método optimización

;

Valor singular

;

Ecuación difusión

;

Localisation / Location

INIST-CNRS, Cote INIST : 2606, 35400013272027.0070

Nº notice refdoc (ud4) : 17154979



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas