Determination of the optical properties of multilayered phantoms by time-resolved reflectance measurements

H. García; D. Iriarte; J. Pomarico; D. Grosenick; R. Macdonald

doi:10.1117/12.2183459

16 July 2015 Determination of the optical properties of multilayered phantoms by time-resolved reflectance measurements

H. García, D. Iriarte, J. Pomarico, D. Grosenick, R. Macdonald

Proceedings Volume 9538, Diffuse Optical Imaging V; 95381G (2015) https://doi.org/10.1117/12.2183459
Event: European Conferences on Biomedical Optics, 2015, Munich, Germany

Abstract

Diffuse optical imaging of the human brain requires methods to account for the layered structure of the head. In this work we present results of experiments performed on layered phantoms in reflection geometry by a time-resolved technique. We investigate structures with two and three layers with the goal to retrieve the optical properties of the deepest one. Data analysis is based on an existing solution of the time-resolved diffusion equation for a multilayer cylinder. Using a sufficiently large source-detector separation the absorption and reduced scattering coefficients of the deepest layer can be derived from time-resolved reflectance with a deviation of typically not more than 10% from the known values.

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H. García, D. Iriarte, J. Pomarico, D. Grosenick, and R. Macdonald "Determination of the optical properties of multilayered phantoms by time-resolved reflectance measurements", Proc. SPIE 9538, Diffuse Optical Imaging V, 95381G (16 July 2015); https://doi.org/10.1117/12.2183459

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KEYWORDS

Optical properties

Absorption

Liquids

Reflectivity

Solids

Tissues

Scattering

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