Multispectral optical imaging of skin-lesions for detection of malignant melanomas.

Optical imaging of skin-lesions for early detection and management of the most fatal skin-cancer malignant melanoma is of significant interest in mass screening of skin-lesions with high-risk population. Surface illumination based optical imaging methods such as epiluminescence light microscopy (ELM) through "Dermascopy" has shown a significant potential in improving early diagnosis of malignant melanomas. Limitations of surface reflectance based imaging systems have been realized in analyzing images for important vascular and depth dependent information. We have developed a novel optical imaging system, the Nevoscope, that uses multispectral transillumination as to provide images of skin-lesions showing sub-surface pigmentation as well as vascular architecture based blood volume information. This paper presents multispectral Nevoscope transillumination method to compare and analyze ratiometric measurements to epiluminescence imaging for its ability to discriminate malignant melanomas from dysplastic nevi and other normal skin-lesions.