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 language | English (US) |
|---|---|
| Article number | 6062378 |
| Pages (from-to) | 1313-1325 |
| Number of pages | 13 |
| Journal | IEEE Journal on Selected Topics in Quantum Electronics |
| Volume | 18 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2012 |
Funding
Manuscript received September 1, 2011; revised October 20, 2011; accepted October 20, 2011. Date of publication October 27, 2011; date of current version July 6, 2012. This work was supported by the National Institute of Health under Grant RO1CA128641 and Grant RO1EB003682. The work of A. J. Radosevich was supported by the National Science Foundation Graduate Research Fellowship under Grant DGE-0824162.
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
