Ultrastructural alterations in field carcinogenesis measured by enhanced backscattering spectroscopy

Andrew J. Radosevich*, Nikhil N. Mutyal, Ji Yi, Yolanda Stypula-Cyrus, Jeremy D. Rogers, Michael J. Goldberg, Laura K. Bianchi, Shailesh Bajaj, Hemant K. Roy, Vadim Backman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Optical characterization of biological tissue in field carcinogenesis offers a method with which to study the mechanisms behind early cancer development and the potential to perform clinical diagnosis. Previously, lowcoherence enhanced backscattering spectroscopy (LEBS) has demonstrated the ability to discriminate between normal and diseased organs based on measurements of histologically normal-appearing tissue in the field of colorectal (CRC) and pancreatic (PC) cancers. Here, we implement the more comprehensive enhanced backscattering (EBS) spectroscopy to better understand the structural and optical changes which lead to the previous findings. EBS provides high-resolution measurement of the spatial reflectance profile Prs between 30 microns and 2.7 mm, where information about nanoscale mass density fluctuations in the mucosa can be quantified. A demonstration of the length-scales at which Prs is optimally altered in CRC and PC field carcinogenesis is given and subsequently these changes are related to the tissue's structural composition. Three main conclusions are made. First, the most significant changes in Prs occur at short length-scales corresponding to the superficial mucosal layer. Second, these changes are predominantly attributable to a reduction in the presence of subdiffractional structures. Third, similar trends are seen for both cancer types, suggesting a common progression of structural alterations in each.

Original languageEnglish (US)
Article number097002
JournalJournal of Biomedical Optics
Volume18
Issue number9
DOIs
StatePublished - Nov 22 2013

Keywords

  • Enhanced backscattering
  • coherent backscattering
  • colorectal cancer
  • elastic light scattering
  • inverse scattering
  • optical properties
  • pancreatic cancer
  • spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering

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