Adopting higher-order similarity relations for improved estimation of optical properties from subdiffusive reflectance

Estimation of optical properties from subdiffusive reflectance acquired at short source-detector separations is challenging due to the sensitivity to the underlying scattering phase function. In recent studies, a second-order similarity parameter γ has been increasingly used alongside the absorption...

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Published in:Optics letters 2017-04, Vol.42 (7), p.1357-1360
Main Authors: Naglič, Peter, Pernuš, Franjo, Likar, Boštjan, Bürmen, Miran
Format: Article
Language:English
Subjects:
Absorption
Computer simulation
Inverse
Mathematical models
Optical properties
Reflectance
Reflectivity
Similarity
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description Estimation of optical properties from subdiffusive reflectance acquired at short source-detector separations is challenging due to the sensitivity to the underlying scattering phase function. In recent studies, a second-order similarity parameter γ has been increasingly used alongside the absorption and reduced scattering coefficients to account for some of the phase function variability. By using Monte Carlo simulations, we show that the influence of the scattering phase function on the subdiffusive reflectance for the biologically relevant variations can be captured sufficiently well by considering γ and a third-order similarity parameter δ. Utilizing this knowledge, we construct an inverse model that estimates the absorption and reduced scattering coefficients, γ and δ, from spatially resolved reflectance. Nearly an order of magnitude smaller errors of the estimated optical properties are obtained in comparison to the inverse model that only composes γ.
doi_str_mv 10.1364/OL.42.001357
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subjects Absorption
Computer simulation
Inverse
Mathematical models
Optical properties
Reflectance
Reflectivity
Similarity
title Adopting higher-order similarity relations for improved estimation of optical properties from subdiffusive reflectance
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