Fiche publication
Date publication
juin 2016
Journal
Optics express
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BLONDEL Walter
,
Pr DAUL Christian
Tous les auteurs :
Kholodtsova MN, Daul C, Loschenov VB, Blondel WC
Lien Pubmed
Résumé
This paper presents a new approach to estimate optical properties (absorption and scattering coefficients µa and µs) of biological tissues from spatially-resolved spectroscopy measurements. A Particle Swarm Optimization (PSO)-based algorithm was implemented and firstly modified to deal with spatial and spectral resolutions of the data, and to solve the corresponding inverse problem. Secondly, the optimization was improved by fitting exponential decays to the two best points among all clusters of the "particles" randomly distributed all over the parameter space (µs, µa) of possible solutions. The consequent acceleration of all the groups of particles to the "best" curve leads to significant error decrease in the optical property estimation. The study analyzes the estimated optical property error as a function of the various PSO parameter combinations, and several performance criteria such as the cost-function error and the number of iterations in the algorithms proposed. The final one led to error values between ground truth and estimated values of µs and µa less than 6%.
Référence
Opt Express. 2016 06 13;24(12):12682-700
