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Proceedings Paper

Temperature monitoring by infrared radiation measurements during ArF excimer laser ablation with cornea
Author(s): Miya Ishihara; Tsunenori Arai; Shunichi Sato; Hironori Nakano; Minoru Obara; Makoto Kikuchi
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Paper Abstract

We measured infrared thermal radiation from porcine cornea during various fluences ArF excimer laser ablations with 1 microsecond(s) rise time. To obtain absolute temperature by means of Stefan-Boltzman law of radiation, we carried out a collection efficiency and detective sensitivity by a pre-experiment using panel heater. We measured the time course of the thermal radiation intensity with various laser fluences. We studied the relation between the peak cornea temperature during the ablation and irradiation fluences. We found the ablation situations, i.e., sub-ablation threshold, normal thermal ablation, and over-heated ablation, may be judged by both of the measured temperature transient waveforms and peak temperature. The boundary fluences corresponding to normal thermal ablation were 90 and 160 mJ/cm2. Our fast remote temperature monitoring during cornea ablation might be useful to control ablation quality/quantity of the cornea ArF laser ablation, that is PRK.

Paper Details

Date Published: 14 June 1999
PDF: 5 pages
Proc. SPIE 3601, Laser-Tissue Interaction X: Photochemical, Photothermal, and Photomechanical, (14 June 1999); doi: 10.1117/12.350017
Show Author Affiliations
Miya Ishihara, National Defense Medical College (Japan)
Tsunenori Arai, National Defense Medical College (Japan)
Shunichi Sato, National Defense Medical College Research Institute (Japan)
Hironori Nakano, Keio Univ. (Japan)
Minoru Obara, Keio Univ. (Japan)
Makoto Kikuchi, National Defense Medical College (Japan)

Published in SPIE Proceedings Vol. 3601:
Laser-Tissue Interaction X: Photochemical, Photothermal, and Photomechanical
Steven L. Jacques; David H. Sliney; Gerhard J. Mueller; Gerhard J. Mueller; Andre Roggan; Andre Roggan; David H. Sliney, Editor(s)

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