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Updated: Mar 31, 2026

Agarose-based Tissue Mimicking Optical Phantoms for Diffuse Reflectance Spectroscopy
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Optical phantoms with adjustable subdiffusive scattering parameters.

Philipp Krauter, Steffen Nothelfer, Nico Bodenschatz

    Journal of Biomedical Optics
    |October 17, 2015
    PubMed
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    A novel epoxy-resin optical phantom system offers adjustable scattering properties for advanced optical measurements. This system enables precise control over anisotropy and phase function parameters, crucial for accurate optical simulations.

    Area of Science:

    • Biomedical Optics
    • Materials Science

    Background:

    • Optical phantoms are essential for calibrating and validating optical measurement systems.
    • Existing phantoms often lack tunable scattering properties, limiting their versatility.

    Purpose of the Study:

    • To develop a novel epoxy-resin-based optical phantom system with adjustable subdiffusive scattering parameters.
    • To characterize the optical properties (absorption, scattering, fluorescence, refractive index) of the phantom matrix and its components.
    • To demonstrate the ability to continuously adjust anisotropy (g) and phase function parameter (γ) values.

    Main Methods:

    • Fabrication of an epoxy-resin matrix doped with aluminium oxide and titanium dioxide as scattering agents.
    • Measurement of scattering and reduced scattering coefficients for individual scattering agents.

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  • Theoretical description and experimental validation of mixing scattering agents to achieve adjustable anisotropy and phase function parameters.
  • Spectroscopic analysis of added pigments for tailored absorption characteristics.
  • Aging analysis to ensure phantom stability and long-term characterization.

    • Main Results:

    • Successfully developed an epoxy-resin optical phantom with adjustable scattering.
    • Quantified scattering and reduced scattering coefficients of aluminium oxide and titanium dioxide.
    • Demonstrated continuous adjustment of anisotropy (g) from 0.65 to 0.9 and phase function parameter (γ) from 1.4 to 2.2.
    • Provided absorption spectra for various pigments, enabling customized absorption profiles.
    • Confirmed phantom stability through aging analysis.

    Conclusions:

    • The developed optical phantom system provides a versatile platform for simulating complex light scattering and absorption scenarios.
    • The adjustable anisotropy and phase function parameters offer unprecedented control for optical system calibration and research.
    • This novel phantom system advances the field of optical phantoms for biomedical and other optical applications.