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Proceedings Paper

Laser treatment of cutaneous lesions with image-guided fine spot-scanning irradiation
Author(s): Isami Nitta; Xuefeng Zhao; Akihiro Kanno; Yasushi Kan; Takezawa Yoshimasa; Tomohiro Maruyama; Yoshitaka Maeda
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Paper Abstract

We propose a new laser irradiation method for the treatment of cutaneous lesions in plastic surgery. In general, lasers with a spot size of 1 to 10 mm are used in irradiation on diseased skin. Although the target absorbs more light energy according to the theory of selective photothermolysis, the surrounding tissue, however, is still somewhat damaged. In proposed method, an f-theta lens, which is assembled by a shrink fitter, focuses the irradiation laser beam to a very fine spot with the size of 125 μm. Guided by the captured object-image, such laser beam is conducted by a pair of galvanometer-driven mirrors to irradiate only the desired tissue target without thermal damage to surrounding tissue. Moreover, an optical coherence tomography, whose probe is capable of wide field of view, can be used to provide the guidance information for the best treatment. The usefulness of the developed laser therapy apparatus was demonstrated by performing an experiment on the removal of tattoo pigment.

Paper Details

Date Published: 8 January 2008
PDF: 8 pages
Proc. SPIE 6826, Optics in Health Care and Biomedical Optics III, 68260H (8 January 2008); doi: 10.1117/12.755559
Show Author Affiliations
Isami Nitta, Niigata Univ. (Japan)
Xuefeng Zhao, Niigata Univ. (Japan)
Akihiro Kanno, Niigata Ken Area Industry Promotion Ctr. (Japan)
Yasushi Kan, ACTIVE Co., Ltd. (Japan)
Takezawa Yoshimasa, Niigata Univ. (Japan)
Tomohiro Maruyama, Saiseikai Niigata Daini Hospital (Japan)
Yoshitaka Maeda, Niigata Univ. (Japan)

Published in SPIE Proceedings Vol. 6826:
Optics in Health Care and Biomedical Optics III
Xingde Li; Qingming Luo; Ying Gu M.D., Editor(s)

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