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Journal of Biomedical Optics • Open Access

Comparison of multispectral wide-field optical imaging modalities to maximize image contrast for objective discrimination of oral neoplasia
Author(s): Darren M. Roblyer; Cristina Kurachi; Vanda Stepanek; Richard A. Schwarz; Michelle D. Williams; Adel K. El-Naggar; J. Jack Lee; Ann M. Gillenwater; Rebecca R. Richards-Kortum

Paper Abstract

Multispectral widefield optical imaging has the potential to improve early detection of oral cancer. The appropriate selection of illumination and collection conditions is required to maximize diagnostic ability. The goals of this study were to (i) evaluate image contrast between oral cancer/precancer and non-neoplastic mucosa for a variety of imaging modalities and illumination/collection conditions, and (ii) use classification algorithms to evaluate and compare the diagnostic utility of these modalities to discriminate cancers and precancers from normal tissue. Narrowband reflectance, autofluorescence, and polarized reflectance images were obtained from 61 patients and 11 normal volunteers. Image contrast was compared to identify modalities and conditions yielding greatest contrast. Image features were extracted and used to train and evaluate classification algorithms to discriminate tissue as non-neoplastic, dysplastic, or cancer; results were compared to histologic diagnosis. Autofluorescence imaging at 405-nm excitation provided the greatest image contrast, and the ratio of red-to-green fluorescence intensity computed from these images provided the best classification of dysplasia/cancer versus non-neoplastic tissue. A sensitivity of 100% and a specificity of 85% were achieved in the validation set. Multispectral widefield images can accurately distinguish neoplastic and non-neoplastic tissue; however, the ability to separate precancerous lesions from cancers with this technique was limited.

Paper Details

Date Published: 1 November 2010
PDF: 9 pages
J. Biomed. Opt. 15(6) 066017 doi: 10.1117/1.3516593
Published in: Journal of Biomedical Optics Volume 15, Issue 6
Show Author Affiliations
Darren M. Roblyer, Rice Univ. (United States)
Cristina Kurachi, Univ. de São Paulo (Brazil)
Vanda Stepanek, The Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Richard A. Schwarz, Rice Univ. (United States)
Michelle D. Williams, The Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Adel K. El-Naggar, The Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
J. Jack Lee, The Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Ann M. Gillenwater, The Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Rebecca R. Richards-Kortum, Rice Univ. (United States)

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