[2] [2] LANE P, LAM S, FOllE M, et al.Oral fluorescence imaging using 405-nm excitation, aiding the discrimination of cancers and precancers by identifying changes in collagen and elastic breakdown and neovascularization in the underlying stroma［J］.Gend Med, 2012, 9 (1 suppl): 78- 82.

[3] [3] SHIN D, VIGNESWARAN N, GILLENWATER A, et al.Advances in fluorescence imaging techniques to detect oral cancer and its precursor［J］.Future Oncol, 2010, 6(7): 1143-1154.

[6] [6] DIETEL W, POTTIER R, PFISTER W, et al.5-Aminolaevulinic acid (ALA) induced formation of different fluorescent porphyrins: a study of the biosynthesis of porphyrins by bacteria of the human digestive tract［J］.Journal of Photochemistry & Photobiology B Biology, 2007, 86(1): 77-86.

[8] [8] THOMS M.Detection of intraoral lesion using a fluorescence camera［C］.Proc of SPIE Lasers in Dentistry XII, 2006, 6137: 1-7.

[9] [9] KAMATH S D, MAHATO K K.Optical pathology using oral tissue fluorescence spectra: classification by principal component analysis and k-means nearest neighbor analysis［J］. Journal of Biomedical Optics, 2007, 12(1): 1-9.

[10] [10] MOAN J, PENG Q.An outline of the hundred-year history of pdt［J］.Anticancer Research.2003, 23(5A): 3591-3600.