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Proceedings Paper

Wavelength dependency of soft tissue coagulation with a tunable cw laser
Author(s): Eric K. Chan; Behrang Amini; Jennifer Kehlet Barton; Ashley J. Welch; Sharon L. Thomsen; Robert C. Stoneman; Leon Esterowitz
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Paper Abstract

A CW Tm:YAG laser with a tuning range from 1.86 to 2.08 micrometers was used to create thermal lesions on chicken breast, calf liver, and porcine cornea. All tissue types were exposed to a constant irradiance (450 mW, 0.92 mm spot diameter, 0.5 and 1.0 second exposures) at five different wavelengths about the 2 micrometers water absorption peak. We estimated tissue absorption coefficients from the thermal history recorded by a 8 - 12 micrometers thermal camera. Our data confirmed that the absorption of all tissue types tested followed the water absorption curve. The effect of these differences in absorption upon the coagulation lesion size was evaluated by histologic measurements.

Paper Details

Date Published: 7 May 1996
PDF: 12 pages
Proc. SPIE 2681, Laser-Tissue Interaction VII, (7 May 1996); doi: 10.1117/12.239561
Show Author Affiliations
Eric K. Chan, Univ. of Texas/Austin (United States)
Behrang Amini, Univ. of Texas/Austin (United States)
Jennifer Kehlet Barton, Univ. of Texas/Austin (United States)
Ashley J. Welch, Univ. of Texas/Austin (United States)
Sharon L. Thomsen, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Robert C. Stoneman, Naval Research Lab. (United States)
Leon Esterowitz, Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 2681:
Laser-Tissue Interaction VII
Steven L. Jacques, Editor(s)

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