Figure 3From: Diagnostic accuracy of diffuse reflectance imaging for early detection of pre-malignant and malignant changes in the oral cavity: a feasibility study Imaging results of a typical pre-malignant lesion; (a) photograph of the lesion (leukoplakia on the LT of a 43 old male), (b) pathology shows severe dysplasia, (c) monochrome ratio image R545/R575 and (d) PCM ratio image (R545/R575) shows severe dysplastic region as red. Back to article page