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Proceedings Paper

Time-resolved measurements of sodium emission in the plume generated by laser ablation of myocardium tissue
Author(s): Hanriete Pereira de Souza; Egberto Munin; Carlos Eduardo de Vilhena Paiva; Leandro Procopio Alves; Marcela Leal Redigolo; Marcos Tadeu Tavares Pacheco
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Paper Abstract

Optical spectroscopy stands as a powerful tool to gather information on the physical phenomena involved in the laser ablation process. This work reports on the time-resolved measurement of the ablation plume generated by a Q-switched Nd:YAG laser. Chicken heart tissue was used as sample. A helium-neon laser, aligned perpendicularly to the Nd:YAG laser beam and parallel to the ablated surface, was used as a probe beam. The probe light is collected by an optical fiber and sent to a spectrophotometer for analysis. A CCD detector was connected to the spectrometer. The technique reveals the differences in the plume behavior. Our results show that the plume is formed with some delay time with respect to the high energy laser pulse. The data show the constitution of the plume for different moments in time allowing the identification of the sodium emission lines in the chicken myocardium. For times lower than 40 μs just light components are ejected from the tissue while the heavier components of the plume takes much more time to be ejected and later to dissipate from the path of the probe beam.

Paper Details

Date Published: 1 July 2004
PDF: 5 pages
Proc. SPIE 5319, Laser Interaction with Tissue and Cells XV, (1 July 2004); doi: 10.1117/12.530540
Show Author Affiliations
Hanriete Pereira de Souza, Univ. do Vale do Paraiba (Brazil)
Egberto Munin, Univ. do Vale do Paraiba (Brazil)
Carlos Eduardo de Vilhena Paiva, Univ. do Vale do Paraiba (Brazil)
Leandro Procopio Alves, Univ. do Vale do Paraiba (Brazil)
Marcela Leal Redigolo, Univ. do Vale do Paraiba (Brazil)
Marcos Tadeu Tavares Pacheco, Univ. do Vale do Paraiba (Brazil)


Published in SPIE Proceedings Vol. 5319:
Laser Interaction with Tissue and Cells XV
Steven L. Jacques; William P. Roach, Editor(s)

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