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Journal of Biomedical Optics

Diagnosis of meningioma by time-resolved fluorescence spectroscopy
Author(s): Pramod V. Butte; Brian K. Pikul; Aviv Hever; William H. Yong; Keith L. Black; Laura Marcu
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Paper Abstract

We investigate the use of time-resolved laser-induced fluorescence spectroscopy (TR-LIFS) as an adjunctive tool for the intraoperative rapid evaluation of tumor specimens and delineation of tumor from surrounding normal tissue. Tissue autofluorescence is induced with a pulsed nitrogen laser (337 nm, 1.2 ns) and the intensity decay profiles are recorded in the 370 to 500 nm spectral range with a fast digitizer (0.2 ns resolution). Experiments are conducted on excised specimens (meningioma, dura mater, cerebral cortex) from 26 patients (97 sites). Spectral intensities and time-dependent parameters derived from the time-resolved spectra of each site are used for tissue characterization. A linear discriminant analysis algorithm is used for tissue classification. Our results reveal that meningioma is characterized by unique fluorescence characteristics that enable discrimination of tumor from normal tissue with high sensitivity (>89%) and specificity (100%). The accuracy of classification is found to increase (92.8% cases in the training set and 91.8% in the cross-validated set correctly classified) when parameters from both the spectral and the time domain are used for discrimination. Our findings establish the feasibility of using TR-LIFS as a tool for the identification of meningiomas and enables further development of real-time diagnostic tools for analyzing surgical tissue specimens of meningioma or other brain tumors.

Paper Details

Date Published: 1 November 2005
PDF: 9 pages
J. Biomed. Opt. 10(6) 064026 doi: 10.1117/1.2141624
Published in: Journal of Biomedical Optics Volume 10, Issue 6
Show Author Affiliations
Pramod V. Butte, Cedars-Sinai Medical Ctr. (United States)
Brian K. Pikul, Cedars-Sinai Medical Ctr. (United States)
Aviv Hever, Cedars-Sinai Medical Ctr. (United States)
William H. Yong, Cedars-Sinai Medical Ctr. (United States)
Keith L. Black, Cedars-Sinai Medical Ctr. (United States)
Laura Marcu, Univ. of California/Davis (United States)

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