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Proceedings Paper

Porcine skin thermal response to near-IR lasers using a fast infrared camera
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Paper Abstract

We have measured the Minimum Visible Lesion (MVL) thresholds for porcine skin and determined the ED50 for exposures at 1314 nm and 0.35 ms laser pulses. An in-vivo pigmented animal model, Yucatan mini-pig (Sus scrofa domestica), was used in this study. We also have measured the thermal response using a high-speed Infrared camera for single pulse temperature recordings for Gaussian beams of 1 mm diameter. Several 2-D measurements of temperature as a function of time were made with an IR array detector thermal camera using a sampling rate of 100 frames per second. In Vitro samples of the same pig skin were used for measurements of the optical properties (absorption coefficient, μa, and reduced scattering coefficient μs) as a function of wavelength around 1315 nm wavelength. A measured surface temperature distribution for one IR laser pulse of 0.37J at a spot size of 1.2 mm diameter gave approximately a 43° C rise at a hot spot. Temperature distributions as a function of time and space will be presented and compared with the measured thresholds.

Paper Details

Date Published: 1 July 2004
PDF: 12 pages
Proc. SPIE 5319, Laser Interaction with Tissue and Cells XV, (1 July 2004); doi: 10.1117/12.529356
Show Author Affiliations
Clarence Cain, Northrop Grumman Corp. (United States)
Thomas Milner, Univ. of Texas/Austin (United States)
Sergey Telenkov, Univ. of Texas/Austin (United States)
Kurt Schuster, Northrop Grumman Corp. (United States)
Kevin Stockton, Northrop Grumman Corp. (United States)
David Stolarski, Northrop Grumman Corp. (United States)
Chris Condit, Univ. of Texas/Austin (United States)
Benjamin A. Rockwell, Air Force Research Lab. (United States)
William P. Roach, Air Force Research Lab. (United States)
A. J. Welch, Univ. of Texas/Austin (United States)

Published in SPIE Proceedings Vol. 5319:
Laser Interaction with Tissue and Cells XV
Steven L. Jacques; William P. Roach, Editor(s)

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