Finite element analysis of temperature-controlled laser coagulation of biological tissue

Tami N. Fink; Sohi Rastegar; Steven L. Jacques; Frank K. Tittel

doi:10.1117/12.182958

17 August 1994 Finite element analysis of temperature-controlled laser coagulation of biological tissue

Tami N. Fink, Sohi Rastegar, Steven L. Jacques, Frank K. Tittel

Proceedings Volume 2134, Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards; (1994) https://doi.org/10.1117/12.182958
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Issues of coagulation control were considered by simulating a controlled surface temperature irradiation using thermal feedback to execute an appropriate temporal profile for laser power. In order to maintain a relatively `constant' temperature at the surface of the tissue, a non- uniform pulse sequence would be required. `Constant' surface temperature irradiation avoids high temperature effects, achieves relatively slow, steady progression of damage, allowing potential real-time monitoring and control of coagulation front position. Furthermore, the difference in damage depth prediction using a constant property model as compared with a temperature dependent optical property model is much less for a `constant' surface temperature irradiation than for a free running laser irradiation.

Citation Download Citation

Tami N. Fink, Sohi Rastegar, Steven L. Jacques, and Frank K. Tittel "Finite element analysis of temperature-controlled laser coagulation of biological tissue", Proc. SPIE 2134, Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards, (17 August 1994); https://doi.org/10.1117/12.182958

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