Title :
The effect of wavelength on ablation mechanisms during CW laser irradiation: argon versus Nd:YAG (1.32 μm)
Author :
LeCarpentier, Gerald L. ; Motamedi, Mohammad ; McMath, Linda P. ; Welch, A.J.
Author_Institution :
Texas Univ., Austin, TX, USA
Abstract :
Some of the wavelength-dependent physical phenomena associated with continuous wave (CW) laser ablation are studied. Porcine aortae were irradiated with CW argon and Nd:YAG (λ=1.32 μm) lasers while high-speed video and infrared cameras were used to observe events occurring during the ablation process. Visual and thermal recordings both contain clear indications of the explosive nature of the process in air for both lasers. The results indicate that specific mechanisms involved in tissue dehydration, ablation onset, and subsequent burning are substantially dependent on the wavelength of the incident irradiation and the distribution of the chief chromophores within the tissue
Keywords :
biothermics; laser applications in medicine; radiation therapy; surgery; 1.32 micron; Ar laser; CW laser irradiation; Nd:YAG lasers; YAG:Nd; YAl5O12:Nd; ablation mechanisms; ablation onset; air; burning; chief chromophores; continuous wave laser ablation; explosive nature; high-speed video; infrared cameras; porcine aortae; thermal recordings; tissue dehydration; wavelength-dependent physical phenomena; Acoustic beams; Argon; Biomedical optical imaging; Cameras; Explosions; Laser ablation; Laser theory; Optical surface waves; Temperature; Video recording;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.96163
