Details
| Original language | English |
|---|---|
| Pages (from-to) | 208-219 |
| Number of pages | 12 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3195 |
| Publication status | Published - 14 Jan 1998 |
| Event | 1997 Lasers-Tissue Interaction, Tissue Optics and Laser Welding III - San Remo, Italy Duration: 5 Sept 1997 → 8 Sept 1997 |
Abstract
Photoablative tissue processing at the wavelength λ ≈ 3μm is of great interest in many medical applications but not yet really understood. A mathematical model of the photoablation process using a free-running infrared laser has been developed. It includes evaporation and thermoelastie pressure generation and was solved using the Finite-Element-Method. Simulated thermoelastic pressure transients are in good agreement with the experiment. It has been shown, that the temperature dependence of the absorption and the volumetric expansion cannot be neglected. With higher laser intensities strong recoil pressure transients (≥ 100bar) and strong thermoelastic pressure transients due to a partially evaporation are given. For this reason a new model including large tissue expansions, tissue overheating and recoil induced pressure transients has been developed and presented. This work is supported by the Deutsche Forschungsgemeinschaft.
Keywords
- Absorption, Finite element method, Infrared, Photoablation, Soft tissue, Temperature, Theoretical
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
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In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 3195, 14.01.1998, p. 208-219.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Modelling and numerical simulation of the infrared photoablation process
AU - Olmes, A.
AU - Brand, M.
AU - Raible, M.
AU - Lubatschowski, H.
AU - Ertmer, W.
AU - Bänsch, Eberhard
AU - Dziuk, G.
AU - Lubatschowski, H.
PY - 1998/1/14
Y1 - 1998/1/14
N2 - Photoablative tissue processing at the wavelength λ ≈ 3μm is of great interest in many medical applications but not yet really understood. A mathematical model of the photoablation process using a free-running infrared laser has been developed. It includes evaporation and thermoelastie pressure generation and was solved using the Finite-Element-Method. Simulated thermoelastic pressure transients are in good agreement with the experiment. It has been shown, that the temperature dependence of the absorption and the volumetric expansion cannot be neglected. With higher laser intensities strong recoil pressure transients (≥ 100bar) and strong thermoelastic pressure transients due to a partially evaporation are given. For this reason a new model including large tissue expansions, tissue overheating and recoil induced pressure transients has been developed and presented. This work is supported by the Deutsche Forschungsgemeinschaft.
AB - Photoablative tissue processing at the wavelength λ ≈ 3μm is of great interest in many medical applications but not yet really understood. A mathematical model of the photoablation process using a free-running infrared laser has been developed. It includes evaporation and thermoelastie pressure generation and was solved using the Finite-Element-Method. Simulated thermoelastic pressure transients are in good agreement with the experiment. It has been shown, that the temperature dependence of the absorption and the volumetric expansion cannot be neglected. With higher laser intensities strong recoil pressure transients (≥ 100bar) and strong thermoelastic pressure transients due to a partially evaporation are given. For this reason a new model including large tissue expansions, tissue overheating and recoil induced pressure transients has been developed and presented. This work is supported by the Deutsche Forschungsgemeinschaft.
KW - Absorption
KW - Finite element method
KW - Infrared
KW - Photoablation
KW - Soft tissue
KW - Temperature
KW - Theoretical
UR - http://www.scopus.com/inward/record.url?scp=0031289146&partnerID=8YFLogxK
U2 - 10.1117/12.297904
DO - 10.1117/12.297904
M3 - Conference article
AN - SCOPUS:0031289146
VL - 3195
SP - 208
EP - 219
JO - Proceedings of SPIE - The International Society for Optical Engineering
JF - Proceedings of SPIE - The International Society for Optical Engineering
SN - 0277-786X
T2 - 1997 Lasers-Tissue Interaction, Tissue Optics and Laser Welding III
Y2 - 5 September 1997 through 8 September 1997
ER -