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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 3, Iss. 6 — Jun. 1, 2012
  • pp: 1226–1240

Broadband ultraviolet-visible optical property measurement in layered turbid media

Quanzeng Wang, Du Le, Jessica Ramella-Roman, and Joshua Pfefer  »View Author Affiliations


Biomedical Optics Express, Vol. 3, Issue 6, pp. 1226-1240 (2012)
http://dx.doi.org/10.1364/BOE.3.001226


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Abstract

The ability to accurately measure layered biological tissue optical properties (OPs) may improve understanding of spectroscopic device performance and facilitate early cancer detection. Towards these goals, we have performed theoretical and experimental evaluations of an approach for broadband measurement of absorption and reduced scattering coefficients at ultraviolet-visible wavelengths. Our technique is based on neural network (NN) inverse models trained with diffuse reflectance data from condensed Monte Carlo simulations. Experimental measurements were performed from 350 to 600 nm with a fiber-optic-based reflectance spectroscopy system. Two-layer phantoms incorporating OPs relevant to normal and dysplastic mucosal tissue and superficial layer thicknesses of 0.22 and 0.44 mm were used to assess prediction accuracy. Results showed mean OP estimation errors of 19% from the theoretical analysis and 27% from experiments. Two-step NN modeling and nonlinear spectral fitting approaches helped improve prediction accuracy. While limitations and challenges remain, the results of this study indicate that our technique can provide moderately accurate estimates of OPs in layered turbid media.

© 2012 OSA

OCIS Codes
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.6510) Medical optics and biotechnology : Spectroscopy, tissue diagnostics
(170.7050) Medical optics and biotechnology : Turbid media
(170.6935) Medical optics and biotechnology : Tissue characterization

ToC Category:
Calibration, Validation and Phantom Studies

History
Original Manuscript: March 9, 2012
Revised Manuscript: April 20, 2012
Manuscript Accepted: April 23, 2012
Published: May 3, 2012

Virtual Issues
Phantoms for the Performance Evaluation and Validation of Optical Medical Imaging Devices (2012) Biomedical Optics Express

Citation
Quanzeng Wang, Du Le, Jessica Ramella-Roman, and Joshua Pfefer, "Broadband ultraviolet-visible optical property measurement in layered turbid media," Biomed. Opt. Express 3, 1226-1240 (2012)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-3-6-1226


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