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Co:MgF2 laser ablation of tissue: Effect of wavelength on ablation threshold and thermal damage

✍ Scribed by Kevin T. Schomacker; Yacov Domankevitz; Thomas J. Flotte; Thomas F. Deutsch

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
973 KB
Volume
11
Category
Article
ISSN
0196-8092

No coin nor oath required. For personal study only.

✦ Synopsis

The wavelength dependence of the ablation threshold of a variety of tissues has been studied by using a tunable pulsed Co:MgF, laser to determine how closely it tracks the optical absorption length of water. The Co:MgF, laser was tuned between 1.81 and 2.14 pm, a wavelength region in which the absorption length varies by a decade. For soft tissues the ablation threshold tracks the optical absorption length; for bone there is little wavelength dependence, consistent with the low water content of bone. Thermal damage vs. wavelength was also studied for cornea and bone. Thermal damage to cornea has a weak wavelength dependence, while that to bone shows little wavelength dependence. Framingcamera pictures of the ablation of both cornea and liver show explosive removal of material, but differ as to the nature of the explosion.

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