Method and apparatus for near-infrared quantitative analysis

Details Method and apparatus for near-infrared quantitative analysis Method and apparatus for near-infrared quantitative analysis

G - Physics

01

N

G01N 21/25 (2006.01) A61B 6/00 (2006.01) G01N 21/35 (2006.01)

Patent

CA 2246495

Method and apparatus for performing near-infrared (NIR) quantitative analysis includes the steps of providing NIR radiation at a plurality of different wavelengths for illumination of an object to be analyzed, and varying the amount of time that radiation at each wavelength illuminates the subject according to the output level of radiation at each wavelength so as to provide substantially similar detection data resolution for each of the plurality of wavelengths. The method is particularly applicable to non-invasive quantitative measurement of blood analytes such as blood glucose levels, using low cost IREDs operating outside their one-half power bandwidths.

Un procédé et un appareil d'analyse quantitative dans l'infrarouge proche comprennent les étapes consistant à produire un rayonnement infrarouge proche à une pluralité de longueurs d'onde différentes afin d'éclairer un objet à analyser, et à faire varier la durée pendant laquelle le rayonnement, à chaque longueur d'onde, éclaire l'objet selon le niveau de rayonnement de sortie de chaque longueur d'onde, de manière à produire une résolution de données de détection sensiblement similaire pour chacune des longueurs d'onde. Le procédé s'applique notamment à la mesure quantitative, dans l'infrarouge proche, de substances à analyser du sang tel que les niveaux de glucose dans le sang, à l'aide de diodes d'émission infrarouge de faible coût opérant en dehors de leurs largeurs de bandes de demi-puissance.

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