Recipes to make organic phantoms for diffusive optical spectroscopy

Appl Opt. 2013 Apr 10;52(11):2494-502. doi: 10.1364/AO.52.002494.

Abstract

Three recipes are presented to make tissue constituent-equivalent phantoms of water and lipids. Different approaches to prepare the emulsion are proposed. Nature phantoms are made using no emulsifying agent, but just a professional disperser; instead Agar and Triton phantoms are made using agar or Triton X-100, respectively, as agents to emulsify water and lipids. Different water-to-lipid ratios ranging from 30% to 70% by mass were tested. A broadband time-resolved diffuse optical spectroscopy system was used to characterize the phantoms in terms of optical properties and composition. For some water/lipid ratios the emulsion fails or the phantom has limited lifetime, but in most cases the recipes provide phantoms with a high degree of homogeneity [coefficient of variation (CV) of 4.6% and 1.5% for the absorption and reduced scattering coefficient, respectively] and good reproducibility (CV of 8.3% and 12.4% for absorption and reduced scattering coefficient, respectively).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biomimetic Materials / chemical synthesis*
  • Equipment Design
  • Equipment Failure Analysis
  • Lipids / chemistry*
  • Nephelometry and Turbidimetry / instrumentation*
  • Organic Chemicals / chemistry*
  • Phantoms, Imaging*
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Spectrum Analysis / instrumentation*
  • Water / chemistry*

Substances

  • Lipids
  • Organic Chemicals
  • Water