Model for thermal ablation of biological tissue


Conference Paper

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. © 1989 SPIE.

Full Text

Duke Authors

Cited Authors

  • Partovi, F; Izatt, JA; Feld, MS; Harrison, GR; Strikwerda, S; Kramer, JR

Published Date

  • August 8, 1989

Published In

Volume / Issue

  • 1064 /

Start / End Page

  • 40 - 44

Electronic International Standard Serial Number (EISSN)

  • 1996-756X

International Standard Serial Number (ISSN)

  • 0277-786X

Digital Object Identifier (DOI)

  • 10.1117/12.951945

Citation Source

  • Scopus