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Optical phantoms with adjustable subdiffusive scattering parameters
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DOI：10.1117/1.JBO.20.10.105008.png)
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摘要
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A new epoxy-resin-based optical phantom system with adjustable subdiffusive scattering parameters is presented along with measurements of the intrinsic absorption, scattering, fluorescence, and refractive index of the matrix material. Both an aluminium oxide powder and a titanium dioxide dispersion were used as scattering agents and we present measurements of their scattering and reduced scattering coefficients. A method is theoretically described for a mixture of both scattering agents to obtain continuously adjustable anisotropy values g between 0.65 and 0.9 and values of the phase function parameter. in the range of 1.4 to 2.2. Furthermore, we show absorption spectra for a set of pigments that can be added to achieve particular absorption characteristics. By additional analysis of the aging, a fully characterized phantom system is obtained with the novelty of g and gamma parameter adjustment. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Keyword:
optical properties
reflectance
refractive index
scattering
absorption
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2.9
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1.4W
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Physical interpretation of the phase function related parameter γ studied with a fractal distribution of spherical scatterers.png)
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