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Proceedings Paper

A guide for calculation of spot size to determine power density for free fiber irradiation of tissue
Author(s): Lloyd P. Tate; Anthony T. Blikslager
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Paper Abstract

Transendoscopic laser treatment for upper airway disorders has been performed in the horse for over twenty years. Endoscopic laser transmission utilizing flexible fiber optics is limited to certain discreet wavelengths. Initially, the laser of choice was the Nd: YAG laser (1064nm), but in the early 1990's, diode lasers (810nm, 980nm) were introduced to veterinary medicine and are currently used in private practice and universities. Precise application of laser irradiation is dependent on the user knowing the laser's output as well as the amount of energy that is delivered to tissue. Knowledge of dosimetry is important to the veterinarian for keeping accurate medical records by being able to describe very specific treatment regimes. The applied energy is best described as power density or energy density. Calculation of this energy is dependent upon the users ability to determine the laser's spot size when irradiating tissue in a non-contact mode. The charts derived from this study provide the veterinarian the ability to estimate spot size for a number of commonly used lasers with the fiber positioned at various distances from the target.

Paper Details

Date Published: 25 April 2005
PDF: 6 pages
Proc. SPIE 5686, Photonic Therapeutics and Diagnostics, (25 April 2005); doi: 10.1117/12.579868
Show Author Affiliations
Lloyd P. Tate, North Carolina State Univ. College of Veterinary Medicine (United States)
Anthony T. Blikslager, North Carolina State Univ. College of Veterinary Medicine (United States)


Published in SPIE Proceedings Vol. 5686:
Photonic Therapeutics and Diagnostics
Brian Jet-Fei Wong; Eugene A. Trowers; Kenton W. Gregory; Abraham Katzir; Nikiforos Kollias; Reza S. Malek; Henry Hirschberg; Kenneth Eugene Bartels; Steen J. Madsen; Lloyd P. Tate; Lawrence S. Bass; Werner T. W. de Riese; Karen M. McNally-Heintzelman, Editor(s)

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