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Proceedings Paper

Variability in fluorescence spectra observed from uterine cervix
Author(s): Kevin T. Schomacker; Kwong Yue Hui; David M. Dalke; Valena Soto-Wright; Louis Burke M.D.
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Paper Abstract

The detection of cervical intraepithelial neoplasia (CIN) in human uterine cervix is possible through the use of fluorescence and reflectance spectroscopy. Fluorescence and reflectance spectra were recorded from the cervix of over 200 patients. Classification performance for distinguishing high-grade CIN (CIN II and III) from normal squamous, normal columnar and metaplastic tissues is 84%. On average, the intensity of fluorescence for CIN II/III lesions is two-fold less than non-CIN II/III tissue. However, variability in the spectra, associated with specific patient, tissue and instrumental parameters, is also noted and tends to blur the distinction between tissue groups. In particular, the intensity of fluorescence was found to increase with patient's age. The magnitude of age-dependence was evaluated using spectra from two of the largest tissue groups: metaplasia (1089 sites in 90 patients) and normal squamous mucosa (763 sites in 56 patients). The metaplasia class shows a stronger age dependence compared to normal squamous tissue: 7.5%/yr versus 2.6%/yr at 390 nm and 2.8%/yr versus 0.9%/yr at 460 nm, representing a two-fold increase in the intensity of fluorescence over 30 years. Hence, the accuracy of tissue classification algorithms may be improved with proper corrections to the spectra for these variables prior to classification.

Paper Details

Date Published: 1 May 2002
PDF: 7 pages
Proc. SPIE 4613, Optical Biopsy IV, (1 May 2002); doi: 10.1117/12.465259
Show Author Affiliations
Kevin T. Schomacker, MediSpectra, Inc. (United States)
Kwong Yue Hui, MediSpectra, Inc. (United States)
David M. Dalke, MediSpectra, Inc. (United States)
Valena Soto-Wright, Boston Univ. (United States)
Louis Burke M.D., Harvard Medical School and Deaconess Medical Ctr. (United States)

Published in SPIE Proceedings Vol. 4613:
Optical Biopsy IV
Robert R. Alfano, Editor(s)

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