Porcine Skin Thermal Response to Near-IR Lasers Using a Fast Infrared Camera
NORTHROP GRUMMAN CORP SAN ANTONIO TX INFORMATION TECHNOLOGY
Pagination or Media Count:
We have measured the minimum visible lesion MVL thresholds for porcine skin and determined the ED50 for exposures at 1314 nm for 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 2-D thermal response using a high-speed 100 frames per second infrared camera for single-pulse temperature recordings for Gaussian beams of 1 mm diameter. In Vitro samples of the same pig skin were used for measurements of the optical properties absorption coefficient, musub a, and reduced scattering coefficient musub s 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 1.3 mm diameter gave approximately a 43 degrees C rise at a hot spot. Computed temperature distributions as a function of time and space are presented and compared with the measured surface temperatures.
- Medicine and Medical Research
- Stress Physiology
- Lasers and Masers