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Proceedings Paper

Imaging of strain in a tissue phantom during pulsed holmium laser ablation
Author(s): Didier Beghuin; Joseph T. Walsh Jr.; Guy P. Delacretaz; Thomas Asshauer
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Paper Abstract

Laser ablation and associated bubble formation are known to damage biologic tissue. Imaging of tissue straining during ablation would help to understand and control laser-induced damages. We have used polariscopic imaging to monitor the strain induced by pulsed holmium laser irradiation. A photoelastic tissue phantom, poly(acrylamide) gel, whose viscoelastic properties could be controlled was used to mimic various tissues. The laser energy was delivered to the sample via an optical fiber placed either perpendicularly 1.7 mm from the surface or within the sample. Only compressive strain is observed when the bubble is formed within the phantom, whereas significant tensile strain is induced when the bubble is formed at or next to the surface.

Paper Details

Date Published: 14 January 1998
PDF: 6 pages
Proc. SPIE 3195, Laser-Tissue Interaction, Tissue Optics, and Laser Welding III, (14 January 1998); doi: 10.1117/12.297898
Show Author Affiliations
Didier Beghuin, Ecole Polytechnique Federale de Lausanne (Switzerland)
Joseph T. Walsh Jr., Northwestern Univ. (United States)
Guy P. Delacretaz, Ecole Polytechnique Federale de Lausanne (Switzerland)
Thomas Asshauer, Ecole Polytechnique Federale de Lausanne (Switzerland)


Published in SPIE Proceedings Vol. 3195:
Laser-Tissue Interaction, Tissue Optics, and Laser Welding III
Guy P. Delacretaz; Guilhem Godlewski M.D.; Roberto Pini; Rudolf W. Steiner; Lars Othar Svaasand, Editor(s)

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