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Journal of Biomedical Optics

Spatially resolved reflectance spectroscopy for diagnosis of cervical precancer: Monte Carlo modeling and comparison to clinical measurements
Author(s): Dizem Arifler; Calum E. MacAulay; Michelle Follen; Rebecca R. Richards-Kortum
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Paper Abstract

We present Monte Carlo modeling studies to provide a quantitative understanding of contrast observed in spatially resolved reflectance spectra of normal and highly dysplastic cervical tissue. Simulations have been carried out to analyze the sensitivity of spectral measurements to a range of changes in epithelial and stromal optical properties that are reported to occur as dysplasia develops and to predict reflectance spectra of normal and highly dysplastic tissue at six different source-detector separations. Simulation results provide important insights into specific contributions of different optical parameters to the overall spectral response. Predictions from simulations agree well with in vivo measurements from cervical tissue and successfully describe spectral differences observed in reflectance measurements from normal and precancerous tissue sites. Penetration depth statistics of photons detected at the six source-detector separations are also presented to reveal the sampling depth profile of the fiber-optic probe geometry simulated. The modeling studies presented provide a framework to meaningfully interpret optical signals obtained from epithelial tissues and to optimize design of optical sensors for in vivo reflectance measurements for precancer detection. Results from this study can facilitate development of analytical photon propagation models that enable inverse estimation of diagnostically relevant optical parameters from in vivo reflectance measurements.

Paper Details

Date Published: 1 November 2006
PDF: 16 pages
J. Biomed. Opt. 11(6) 064027 doi: 10.1117/1.2398932
Published in: Journal of Biomedical Optics Volume 11, Issue 6
Show Author Affiliations
Dizem Arifler, Eastern Mediterranean Univ. (Turkey)
Calum E. MacAulay, BC Cancer Agency (Canada)
Michelle Follen, The Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Rebecca R. Richards-Kortum, Rice Univ. (United States)

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