Tattoo removal in micropigs with low-energy pulses from a Q-switched Nd:YAG laser at 1064 nm

Xin-Hua Hu; W. A. Wooden; Mickael J. Cariveau; Qiyin Fang; J. F. Bradfield; Gerhard W. Kalmus; S. J. Vore; Y. Sun

doi:10.1117/12.427822

21 May 2001 Tattoo removal in micropigs with low-energy pulses from a Q-switched Nd:YAG laser at 1064 nm

Xin-Hua Hu, W. A. Wooden, Mickael J. Cariveau, Qiyin Fang, J. F. Bradfield, Gerhard W. Kalmus, S. J. Vore, Y. Sun

Proceedings Volume 4244, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XI; (2001) https://doi.org/10.1117/12.427822
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

Abstract

Treatment of pigmented lesions in skin with visible or near- infrared nanosecond (ns) laser pulses often causes significant collateral tissue damage because the current approach uses pulses with energy of 300 mJ or larger. Additionally, this requires large Q-switched laser systems. To overcome these disadvantages, we have investigated a different approach in delivering ns laser pulses for cutaneous lesion treatment. Tattoo removal in an animal model with a focused laser beam from a Q-switched Nd:YAG laser has been investigated in two Yucatan micropigs tattooed with blue, black, green and red pigments. The tattoos were treated with a focused beam of 12-ns pulses at 1064 nm, with different depth under the skin surface, while the micropig was translated to achieve an effect of single pulse per ablation site in the skin. With the pulse energy reduced to a range from 38 to 63 mJ, we found that nearly complete clearance was achieved for blue and black tattoos while clearance of red and green tattoos was incomplete. Analysis of the skin appearance suggested that the pulse energy can be decreased to below 20 mJ which may lead to further reduction of the collateral tissue damage and improve the clearance of red and green tattoos.

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Xin-Hua Hu, W. A. Wooden, Mickael J. Cariveau, Qiyin Fang, J. F. Bradfield, Gerhard W. Kalmus, S. J. Vore, and Y. Sun "Tattoo removal in micropigs with low-energy pulses from a Q-switched Nd:YAG laser at 1064 nm", Proc. SPIE 4244, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XI, (21 May 2001); https://doi.org/10.1117/12.427822

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KEYWORDS

Skin

Laser therapeutics

Laser ablation

Q switched lasers

Laser tissue interaction

Nd:YAG lasers

Pulsed laser operation

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