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Dependence of laser‐induced optical breakdown on skin type during 1064 nm picosecond laser treatment
Author(s) -
Kim Hyeonsoo,
Hwang Jewan Kaiser,
Choi Jongman,
Kang Hyun Wook
Publication year - 2021
Publication title -
journal of biophotonics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 66
eISSN - 1864-0648
pISSN - 1864-063X
DOI - 10.1002/jbio.202100129
Subject(s) - vacuolization , laser , picosecond , irradiation , materials science , optics , chemistry , pathology , medicine , physics , nuclear physics
Abstract The current study aims to evaluate the dependence of laser‐induced optical breakdown (LIOB) on skin types by using 1064 nm picosecond laser with micro‐lens arrays (MLA) and diffractive optical elements (DOE). Both black and white skin tissues were examined to comparatively assess the LIOB effects in the skin in terms of laser‐induced vacuolization. The black skin irradiated at 3.0 J/cm 2 demonstrated that MLA yielded a deeper distribution (180‐400 μm) of laser‐induced vacuoles with a size of 67 μm, compared to DOE (180‐280 μm; 40 μm in size). However, the white skin presented that MLA created larger vacuoles (134 μm in size) in a smaller number at deeper distributions (125‐700 μm) than MLA with the black skin. DOE generated no laser‐induced vacuolization in the white skin. The white skin tissue with inherent higher scattering could be responsible for deeper vacuolization after the picosecond laser treatment. Further investigations are expected to determine the optimal treatment conditions for various skin types.