Non-contact skin moisture measurement based on near-infrared spectroscopy
Non-contact skin moisture measurement based on near-infrared spectroscopy
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DOI：
10.1366/0003702042641218
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发表时间：
2004-12-01
影响因子：
3.5
通讯作者：
Egawa, M
中科院分区：
文献类型：
--
作者：
Arimoto, H;Egawa, M
提出了一种基于近红外（NIR）光谱的非接触式皮肤水分测量方法，测量范围为1300 ~ 2000 nm。在光纤探头和皮肤表面之间引入间隙，以避免阻塞表面蒸汽。在体外和体内实验测量皮肤的含水量。测量的吸收光谱通过多变量分析处理。处理结果与电容法测得的含水量值进行了比较。偏最小二乘回归得到的光学法和电容法之间的相关性高于多元线性回归得到的相关性。此外，实施蒙特卡罗模拟来评估光学方法的测量深度。指出光学法的测量深度主要取决于水的吸收。仿真结果还表明，光学法的测量深度远大于电容法，特别是在水吸收相对较弱的光谱范围内。
Non-contact skin moisture measurement based on near-infrared (NIR) spectroscopy is proposed in the spectral range from 1300 to 2000 nm. A gap is introduced between the optical fiber probe and the skin surface in order to avoid occluding surface vapor. In vitro and in vivo experiments for measuring the water content of skin are implemented. The measured absorbance spectra are processed by multivariate analyses. Processed results are compared with the water content values obtained by a capacitance method. The correlations between the optical method and the capacitance method obtained by partial-least squares regression are higher than those obtained by multiple linear regression. In addition, a Monte Carlo simulation is implemented to evaluate measurement depths of the optical methods. It is presented that the measurement depth of the optical method depends largely on the water absorption. The simulation result also shows that the measurement depth of the optical method is much deeper than the depth of the capacitance method, especially in the spectral range where water absorption is relatively weak.