Quantifying phase function influence in subdiffusively backscattered light

Nico Bodenschatz; Philipp Krauter; André Liemert; Alwin Kienle

doi:10.1117/1.JBO.21.3.035002

11 March 2016 Quantifying phase function influence in subdiffusively backscattered light

Nico Bodenschatz, Philipp Krauter, André Liemert, Alwin Kienle

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Journal of Biomedical Optics, Vol. 21, Issue 3, 035002 (March 2016). https://doi.org/10.1117/1.JBO.21.3.035002

Abstract

Light backscattering at short source–detector separations is considerably influenced by the scattering phase function of a turbid medium. We seek to more precisely relate a medium’s subdiffusive backscattering to the angular scattering characteristics of its microstructure. First, we demonstrate the inability of the scattering asymmetry g₁=<cosθ< to predict phase function influence on backscattering and reveal ambiguities related to the established phase function parameter γ. Through the use of high-order similarity relations, we introduce a new parameter that more accurately relates a scattering phase function to its subdiffusive backscattering intensity. Using extensive analytical forward calculations based on solutions to the radiative transfer equation in the spatial domain and spatial frequency domain, we demonstrate the superiority of our empirically derived quantifier σ over the established parameter γ.

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Nico Bodenschatz, Philipp Krauter, André Liemert, and Alwin Kienle "Quantifying phase function influence in subdiffusively backscattered light," Journal of Biomedical Optics 21(3), 035002 (11 March 2016). https://doi.org/10.1117/1.JBO.21.3.035002

Published: 11 March 2016

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