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Proceedings Paper

Monitoring of KrF excimer laser ablation for burn scars: a comparative study of transient reflection measurement and time-resolved photography of ablation plume
Author(s): Akio Nakajima; Tsunenori Arai; Makoto Kikuchi; Akimi Iwaya; Katsuyuki Arai; Satoshi Inazaki; Takatsugu Takaoka; Masayoshi Kato
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Paper Abstract

A simple laser ablation monitoring during burn scar removal by KrF laser irradiation was studied to control laser fluence in real-time. Because, to obtain suitable surface for auto skin-graft, the laser fluence should be precisely controlled at each laser shot. We employed simple probe transmission method which could detect ejected material/phenomena from irradiated surface. The time-course of measured probe intensity contained a couple of attenuated peaks, which might corresponded to a shock wave front and debris plume. The delay time from laser irradiation to the debris plume peak appearance varied with the ablation fluence. The delay time of 1 J/cm2 (near ablation threshold) case prolonged 25% from 8 J/cm2 (far above threshold) case. Therefore, we think the delay time measurement by means of the simple probe transmission method may be available to attain the laser fluence control for nonuniform burn scar removal. The time-resolved photography and probe reflection method were also studied to understand the measured time-course of the transmitted probe intensity.

Paper Details

Date Published: 22 May 1995
PDF: 6 pages
Proc. SPIE 2391, Laser-Tissue Interaction VI, (22 May 1995); doi: 10.1117/12.209897
Show Author Affiliations
Akio Nakajima, National Defense Medical College (Japan)
Tsunenori Arai, National Defense Medical College (Japan)
Makoto Kikuchi, National Defense Medical College (Japan)
Akimi Iwaya, National Defense Medical College (Japan)
Katsuyuki Arai, National Defense Medical College (Japan)
Satoshi Inazaki, Hamamatsu Photonics KK (Japan)
Takatsugu Takaoka, Hamamatsu Photonics KK (Japan)
Masayoshi Kato, Hamamatsu Photonics KK (Japan)

Published in SPIE Proceedings Vol. 2391:
Laser-Tissue Interaction VI
Steven L. Jacques, Editor(s)

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