Polarized enhanced backscattering spectroscopy for characterization of biological tissues at subdiffusion length scales

Andrew J. Radosevich*, Jeremy D. Rogers, Vladimir Turzhitsky, Nikhil N. Mutyal, Ji Yi, Hemant K. Roy, Vadim Backman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Since the early 1980s, the enhanced backscattering (EBS) phenomenon has been well-studied in a large variety of nonbiological materials. Yet, until recently, the use of conventional EBS for the characterization of biological tissue has been fairly limited. In this study, we detail the unique ability of EBS to provide spectroscopic, polarimetric, and depth-resolved characterization of biological tissue using a simple backscattering instrument. We first explain the experimental and numerical procedures used to accurately measure and model the full azimuthal EBS peak shape in biological tissue. Next, we explore the peak shape and height dependencies for different polarization channels and spatial coherence of illumination. We then illustrate the extraordinary sensitivity of EBS to the shape of the scattering phase function using suspensions of latex microspheres. Finally, we apply EBS to biological tissue samples in order to measure optical properties and observe the spatial length scales at which backscattering is altered in early colon carcinogenesis.

Original languageEnglish (US)
Article number6062378
Pages (from-to)1313-1325
Number of pages13
JournalIEEE Journal on Selected Topics in Quantum Electronics
Volume18
Issue number4
DOIs
StatePublished - 2012

Keywords

  • Backscattering spectroscopy
  • cancer detection
  • enhanced backscattering (EBS)
  • polarized light Monte Carlo

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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