Material ejection in free-running Er:YAG laser ablation of water, liver, and skin

Alfred Vogel; Bram Kersten; Ingo Apitz

doi:10.1117/12.477706

27 August 2003 Material ejection in free-running Er:YAG laser ablation of water, liver, and skin

Alfred Vogel, Bram Kersten, Ingo Apitz

Proceedings Volume 4961, Laser-Tissue Interaction XIV; (2003) https://doi.org/10.1117/12.477706
Event: Biomedical Optics, 2003, San Jose, CA, United States

Abstract

We investigated the mechanisms of material ejection in IR laser tissue ablation using free-running Er:YAG laser pulses. We found that for water and soft tissues such as liver the primary mechanism for material ejection is a phase explosion within the target material. The recoil induced by the primary material ejection causes a secondary material expulsion that largely increases the ablation efficiency. For mechanically stronger tissues such as skin, the material ejection is driven by confined boiling, and recoil-induced expulsion plays no role. The high efficiency of recoil-induced material expulsion is associated with a loss in ablation precision and an increase of mechanical side effects that needs to be considered for an appropriate choice of laser parameters.

Citation Download Citation

Alfred Vogel, Bram Kersten, and Ingo Apitz "Material ejection in free-running Er:YAG laser ablation of water, liver, and skin", Proc. SPIE 4961, Laser-Tissue Interaction XIV, (27 August 2003); https://doi.org/10.1117/12.477706

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