Model For Thermal Ablation Of Biological Tissue

F. Partovi; J A Izatt; M S Feld; S. Strikwerda; J R Kramer

doi:10.1117/12.951945

8 August 1989 Model For Thermal Ablation Of Biological Tissue

F. Partovi, J A Izatt, M S Feld, S. Strikwerda, J R Kramer

Proceedings Volume 1064, Thermal and Optical Interactions with Biological and Related Composite Materials; (1989) https://doi.org/10.1117/12.951945
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Assuming that the irradiance of the laser beam is much greater than the threshold for ablation, a simple expression is obtained for the depth of ablation crater as a function of incident fluence. It is expected to be valid even where mechanisms other than thermal dominate the ablation process. A high level of irradiance is necessary to avoid excessive heating of adjacent tissue by heat diffusion. Contrary to expectations based on non-ablative heating, short pulses are not necessarily more effective than longer pulses in minimizing heat diffusion to adjacent tissue. Peripheral heating can further be reduced by using a wavelength with high absorption (short penetration depth) in tissue. Under appropriate conditions of wavelength and irradiance, clean, "cold" cuts are possible with the thermal mechanism of ablation.

Citation Download Citation

F. Partovi, J A Izatt, M S Feld, S. Strikwerda, and J R Kramer "Model For Thermal Ablation Of Biological Tissue", Proc. SPIE 1064, Thermal and Optical Interactions with Biological and Related Composite Materials, (8 August 1989); https://doi.org/10.1117/12.951945

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