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Proceedings Paper

Temperature variations of reflection, transmission, and fluorescence of the arterial wall
Author(s): Francois Chambettaz; Xavier Clivaz; Fabienne D. Marquis-Weible; Rene-Paul Salathe
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Paper Abstract

The variations of reflection and transmission coefficients, as well as of the fluorescence response of the arterial wall are studied as a function of temperature. In a first experiment, reflection coefficient, transmission coefficient, and temperature, are measured during laser irradiation of the tissue. The fluorescence spectrum is recorded in a second experiment, together with temperature, during heating of the arterial wall in a vapor bath. The temperature dependence of the optical parameters and of the fluorescence response are then deduced. For the reflection and transmission coefficients, a direct correlation of their variations with temperature is measured. Extrema are observed in the temperature region at about 50 degree(s)C. A global decrease of the fluorescence intensity is characteristic of a temperature increase. These variations can be used as thermal markers, which in turn could give a criterion to control heat deposition in the tissue during laser anastomose.

Paper Details

Date Published: 1 June 1991
PDF: 7 pages
Proc. SPIE 1427, Laser-Tissue Interaction II, (1 June 1991); doi: 10.1117/12.44097
Show Author Affiliations
Francois Chambettaz, Swiss Federal Institute of Technology (Switzerland)
Xavier Clivaz, Swiss Federal Institute of Technology (Switzerland)
Fabienne D. Marquis-Weible, Swiss Federal Institute of Technology (Switzerland)
Rene-Paul Salathe, Swiss Federal Institute of Technology (Switzerland)

Published in SPIE Proceedings Vol. 1427:
Laser-Tissue Interaction II
Steven L. Jacques, Editor(s)

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