Diffusely scattering phantoms for optical tomography

Uwe Sukowski; Florian Schubert; Dirk Grosenick; Herbert H. Rinneberg

doi:10.1117/12.228653

18 December 1995 Diffusely scattering phantoms for optical tomography

Uwe Sukowski, Florian Schubert, Dirk Grosenick, Herbert H. Rinneberg

Proceedings Volume 2626, Photon Propagation in Tissues; (1995) https://doi.org/10.1117/12.228653
Event: BiOS Europe '95, 1995, Barcelona, Spain

Abstract

We have developed diffusely scattering solid phantoms with optical (scattering) properties amenable to theoretical calculations. Monodisperse quartz glass spheres were used as scatterers embedded in polyester resin. An infrared dye was added to simulate absorption by biological tissue. Solid phantoms were tested for their macroscopic homogeneity. Several phantoms were built with well-defined spatial variations in their transport scattering and absorption coefficients to be used for optical tomography. Scattering, transport scattering, and absorption coefficients of solid, homogeneous phantoms and of aqueous suspensions of monodisperse quartz glass spheres were derived from measurements of time-integrated collimated transmittance and time-resolved diffuse transmittance. For aqueous suspensions of monodisperse quartz glass spheres at known number density scattering and transport scattering coefficients calculated by Mie theory are in quantitative agreement with experimentally derived values. In addition, diffuse reflectance and diffuse transmittance of aqueous suspensions at various number densities were measured and found to be in excellent agreement with results of Monte Carlo calculations using theoretical values for the scattering coefficients and anisotropy parameters.

Citation Download Citation

Uwe Sukowski, Florian Schubert, Dirk Grosenick, and Herbert H. Rinneberg "Diffusely scattering phantoms for optical tomography", Proc. SPIE 2626, Photon Propagation in Tissues, (18 December 1995); https://doi.org/10.1117/12.228653

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