Absorption Coefficient Estimation of Pigmented Skin Phantoms Using Colorimetric Parameters
The increasing use of light-based treatments requires a better understanding of the light tissue interaction for pigmented skin. To enhance comprehension in this area, this study proposes the use of pigmented-mimicking skin phantoms to assess the optical properties based on their tone, represented by the individual typology angle (ITA) color scale. In this study, an epoxy resin matrix alongside compact facial powder and titanium dioxide was used to mimic the absorption, scattering, and shade properties of human skins. Eight phantoms covering the skin tones, light (ITA = 45.2°), tan (ITA = 23.3°), brown (ITA = 6.9°, −5.7°, and −16.9°), and dark (ITA = –34.6°, −41.6°, and −48.6°), were crafted. The absorption and reduced scattering coefficients were obtained using integrating spheres and calibrated spectrometers in the 500–900 nm range, and tones were measured using a commercial colorimeter. The experimental fitting proposed in this study could estimate the optical properties as a function of the skin tones through ITA values, by using an exponential function with a second-order polynomial exponent. This investigation aligns with prior studies involving human skin samples, and these findings hold promise for future clinical and diagnostic applications, particularly in the realm of light-based treatments to individual dermatological corrections in pigmented skin.
Citação
@online{da_cruz_junior,_luismar2025,
author = {Da Cruz Junior, Luismar, Barbosa and De Barros, Kaio,
Bernardo and Girasol, Carlos, Eduardo and Quaranta Lobão, Raissa,
Mendonça and Luciano , Bachmann},
title = {Absorption Coefficient Estimation of Pigmented Skin Phantoms
Using Colorimetric Parameters},
volume = {79},
number = {3},
date = {2025-03-01},
doi = {10.1177/00037028241281388},
langid = {pt-BR},
abstract = {The increasing use of light-based treatments requires a
better understanding of the light tissue interaction for pigmented
skin. To enhance comprehension in this area, this study proposes the
use of pigmented-mimicking skin phantoms to assess the optical
properties based on their tone, represented by the individual
typology angle (ITA) color scale. In this study, an epoxy resin
matrix alongside compact facial powder and titanium dioxide was used
to mimic the absorption, scattering, and shade properties of human
skins. Eight phantoms covering the skin tones, light (ITA = 45.2°),
tan (ITA = 23.3°), brown (ITA = 6.9°, −5.7°, and −16.9°), and dark
(ITA = –34.6°, −41.6°, and −48.6°), were crafted. The absorption and
reduced scattering coefficients were obtained using integrating
spheres and calibrated spectrometers in the 500–900 nm range, and
tones were measured using a commercial colorimeter. The experimental
fitting proposed in this study could estimate the optical properties
as a function of the skin tones through ITA values, by using an
exponential function with a second-order polynomial exponent. This
investigation aligns with prior studies involving human skin
samples, and these findings hold promise for future clinical and
diagnostic applications, particularly in the realm of light-based
treatments to individual dermatological corrections in pigmented
skin.}
}