Mr. Maciej Marchwinski Profile

Maciej Marchwinski

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Proceedings Article | 26 September 2016 Paper

Use of optical skin phantoms for calibration of dermatological lasers

M. Wróbel, A. Sękowska, M. Marchwiński, S. Galla, A. Cenian

Proceedings Volume 9961, 996113 (2016) https://doi.org/10.1117/12.2240064

KEYWORDS: Tissue optics, Thermography, Skin, Calibration, Laser scattering, Scattering, Reflectivity, Zinc oxide, Absorption, Optical properties

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A wide range of dermatological diseases can be efficiently treated using laser heating. Nevertheless, before the new laser is introduced into clinical practice, its parameters and ability to interact with human skin have to be carefully examined. In order to do that optical skin phantoms can be used. Such phantoms closely imitate the scattering and absorption properties of real human skin tissue along with its thermal properties, such as capacitance and conductivity specific heat. We have fabricated a range of optical tissue phantoms based on polyvinylchloride-plastisol PVC-P with varying optical properties, including the absorption, scattering and density of the matrix material. We have utilized a pre-clinical dermatological laser system with a 975 nm diode laser module. A range of laser settings were tested, such as laser pulse duration, laser power and number of pulses. We have studied laser irradiation efficiency on fabricated optical tissue phantoms. Measurements of the temporal and spatial temperature distribution on the phantoms' surface were performed using thermographic imaging. The comparison of results between tissues' and phantoms' optical and thermal response prove that they can be used for approximate evaluation of laser heating efficiency. This study presents a viable approach for calibration of dermatological lasers which can be utilized in practice.

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