Optical properties of highly scattering media determined from changes in attenuation, phase, and modulation depth

被引：12
作者：
Kohl, M
Watson, R
Cope, M
机构：
[1] The Department of Medical Physics and Bioengineering, University College London, London, WC1E 6JA, First Floor, Shropshire House
来源：
APPLIED OPTICS | 1997年 / 36卷 / 01期
基金：
英国惠康基金;
关键词：
absorption coefficient; scattering coefficient; diffusion theory; intensity-modulated optical spectrometer;
D O I：
10.1364/AO.36.000105
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The optical properties of scattering media determine the attenuation (A) and the transit time ([t]) of light reflected from the medium as well as the phase (Phi) and modulation depth (M) of an intensity-modulated lightwave. Our primary finding is that the ratio of changes in A, Phi, and M is approximately independent of the scattering properties and gives a good estimate of the absorption coefficient. These changes can be induced either by small changes in the absorption coefficient of the medium, by the tuning of the wavelength, or by changes in the light source-detector distance. The application;for the in vivo monitoring of hemoglobin and oxyhemoglobin concentrations in human tissue is discussed. (C) 1997 Optical Society of America
引用
收藏
页码：105 / 115
页数：11
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