热和压力对660和880 nm表面光反射率的影响

Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI:10.1109/NEBC.1991.154618

J. Abrahams, S. Bhattacharyya, L. Ostrander, W. Cui

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引用次数: 1

摘要

提出了在组织表面反射变化的分析，这是由热引起的充血和皮肤表面施加压力引起的。光学反射率测量波长为660纳米(红色)和880纳米(红外线)。人类受试者的数据包括从小腿开始的体内测量。计算一个指数，该指数是在每个波长施加刺激之前和之后的反射光强度比率的对数。指数曲线的斜率，绘制为源检测器分离的函数，与预期的深度依赖生理变化，组织血分数体积和组织血氧饱和度有关。

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Effects of heat and pressure on surface light reflectance at 660 and 880 nm

Presented is an analysis of changes in reflectance at the tissue surface resulting from heat-induced hyperemia and from applied pressure at the skin surface. Optical reflectance measurements are at wavelengths of 660 nm (red) and 880 nm (infrared). Human subject data consist of in vivo measurements from the calf of the leg. An index is calculated which is a logarithm of the ratio of reflected light intensity before and after stimulus application at each wavelength. The slope of the index curve, plotted as a function of source-detector separation, is related to the expected depth dependent physiological changes, in tissue blood fractional volume and tissue blood oxygen saturation.<>

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Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference

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