title: Structural length-scale sensitivities of reflectance measurements in continuous random media under the Born approximation.
abstract: Which range of structures contributes to light scattering in a continuous random media, such as biological tissue? In this Letter, we present a model to study the structural length-scale sensitivity of scattering in continuous random media under the Born approximation. The scattering coefficient μs, backscattering coefficient μb, anisotropy factor g, and reduced scattering coefficient μs* as well as the shape of the spatial reflectance profile are calculated under this model. For media with a biologically relevant Henyey-Greenstein phase function with g∼0.93 at wavelength λ=633  nm, we report that μs* is sensitive to structural length-scales from 46.9 nm to 2.07 μm (i.e., λ/13 to 3λ), μb is sensitive from 26.7 to 320 nm (i.e., λ/24 to λ/2), and the spatial reflectance profile is sensitive from 30.8 nm to 2.71 μm (i.e., λ/21 to 4λ).
authors.affiliation: Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, USA. arad@u.northwestern.edu
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Radosevich
authors.forename: Ji
authors.initials: J
authors.lastname: Yi
authors.forename: Jeremy D
authors.initials: JD
authors.lastname: Rogers
authors.forename: Vadim
authors.initials: V
authors.lastname: Backman
mesh_terms: D000818:Animals; D003198:Computer Simulation; D006801:Humans; D008027:Light; D008954:Models, Biological; D015233:Models, Statistical; D009391:Nephelometry and Turbidimetry / Q000379:methods*; D010783:Photometry / Q000379:methods*; D012542:Scattering, Radiation