Patent ID: 6597931
Filing Date: 2003-07-22
Classification: A61B,G01N

Abstract:
An optical system for determining absolute values of concentrations of chromophores in a physiological medium, said optical system comprising:a body; a wave source configured to be supported by said body, to optically couple with said medium, and to irradiate into said medium at least two sets of electromagnetic waves having different wave characteristics; first and second wave detectors configured to be supported by said body, to optically couple with said medium, and to detect electromagnetic waves transmitted through said medium, wherein a distance between said wave source and said first wave detector is different than a distance between said wave source and said second wave detector; and a processing module configured to operatively couple with said first and second wave detectors, and to determine an absolute value of a concentration of a chromophore in said medium from a plurality of wave equations based only on intensity measurements of continuous wave electromagnetic radiation from said first and second wave detectors.