Design, testing, and clinical studies of a handheld polarized light camera

Jessica C. Ramella-Roman; Kenneth Lee M.D.; Scott A. Prahl; Steven L. Jacques

doi:10.1117/1.1781667

1 November 2004 Design, testing, and clinical studies of a handheld polarized light camera

Jessica C. Ramella-Roman, Kenneth Lee M.D., Scott A. Prahl, Steven L. Jacques

Author Affiliations +

Journal of Biomedical Optics, Vol. 9, Issue 6, (November 2004). https://doi.org/10.1117/1.1781667

Abstract

Polarized light imaging has been used to detect the borders of skin cancer and facilitate assessment of cancer boundaries. A design for an inexpensive handheld polarized camera is presented and clinical images acquired with this prototype are shown. The camera is built with two universal serial bus (USB) color video cameras, a polarizing beamsplitter cube, and a 4× objective lens. Illumination is provided by three white LEDs and a sheet polarizer. Horizontal and vertical linearly polarized reflected images are processed at 7 frames/s and a resulting polarized image is displayed on screen. We compare the performances of cheap USB camera and a 16-bit electronically cooled camera. Dark noise and image repeatability are compared. In both cases, the 16-bit camera outperforms the USB cameras. Despite these limitations, the results obtained with this USB prototype are very satisfactory. Examples of polarized images of lesions taken prior to surgery are presented.

©(2004) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Jessica C. Ramella-Roman, Kenneth Lee M.D., Scott A. Prahl, and Steven L. Jacques "Design, testing, and clinical studies of a handheld polarized light camera," Journal of Biomedical Optics 9(6), (1 November 2004). https://doi.org/10.1117/1.1781667

Published: 1 November 2004

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KEYWORDS

Cameras

Polarization

Beam splitters

Skin

Imaging systems

Melanoma

Prototyping

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