Momentum induced by laser-tissue interaction

Ronald S. Dingus

doi:10.1117/12.147690

7 July 1993 Momentum induced by laser-tissue interaction

Ronald S. Dingus

Proceedings Volume 1882, Laser-Tissue Interaction IV; (1993) https://doi.org/10.1117/12.147690
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

Impulsive momentum is imparted to residual tissue during pulsed-laser ablation because the mass ablated is generally ejected with a sizable velocity. Accurate measurements of the impulse are possible, which can provide an important monitor of the ablation process. Simple models can be used to predict the impulse under a variety of conditions; in some cases, complex radiation-hydrodynamic code calculations are required. In this paper, this modeling is discussed along with the dependence of momentum on the pulsed heating and target conditions. Momentum measurement techniques are discussed briefly. The behavior is explained in terms of dimensionless parameters and the impulse coupling coefficient as a function of incident fluence, which has a well defined threshold as well as a maximum. Complications in the mixed liquid-vapor phase are also addressed.

Citation Download Citation

Ronald S. Dingus "Momentum induced by laser-tissue interaction", Proc. SPIE 1882, Laser-Tissue Interaction IV, (7 July 1993); https://doi.org/10.1117/12.147690

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