@inproceedings{ramella03b, author = {Jessica C. Ramella-Roman and Kenneth Lee and Scott A. Prahl and Steven L. Jacques}, editor = {Valery V. Tuchin}, title = {Polarized Light Imaging with a Handheld Camera}, year = {2003}, booktitle = {SPIE Saratov Fall Meeting 2002: Optical Technologies in Biophysics and Medicine IV}, volume = {5068}, page = {284--293}, abstract = {Polarized light imaging can facilitate clinical mapping of skin cancer margins and can potentially guide clinical excision. A real-time hand-held polarized-light system was built to image skin lesions in the clinic. The system consisted of two 8-bit CCD cameras (Camera 1 and Camera 2) mounted on the camera assembly and illuminated the patient's skin. Light was polarized parallel to the source-patient-camera plane. The light, reflected from the patient, was collected with an objective lens mounted on the beam splitter and divided into a horizontal ($H$) and vertical ($V$) component. The $H$ component was collected by Camera 1, and the $V$ component was collected by Camera 2. A new image was generated based on the polarization ratio $(H - V)/(H + V)$ and displayed. This image was sensitive to the superficial skin layer and some early clinical examples are presented.}, }