Classification and characterization of tissue through...

A - Human Necessities – 61 – B

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A61B 5/00 (2006.01) A61B 6/00 (2006.01) G01N 21/35 (2006.01) A61B 5/145 (2006.01)

Patent

CA 2397611

A non-invasive system for characterizing and classifying the state and structure of a tissue sample operates on a near infrared absorbance spectrum of in vivo tissue. A method that uses near-infrared spectral measurements to characterize and classify the state and structure of tissue sampled based on absorbance features related to fat in adipose tissue is provided. Also provided is a method of estimating skin fold thickness. The approach provides information about sources of tissue variability and is therefore useful for establishing the general category of the tissue structure. Categorization of subjects on the basis of the determination is suitable for further spectral analysis and the measurement of biological and chemical compounds, such as blood analytes. The invention further provides a method of estimating percent body fat based on a skin fold thickness estimate. The invention also provides an apparatus for measuring the absorbance spectra coupled with a digital processor for performing the required analyses.

L'invention porte: sur un système non invasif de caractérisation et classification de l'état et de la structure d'échantillons de tissus utilisant in vivo le spectre d'absorption des tissus dans l'IR proche, sur une méthode recourant à des mesures spectrales dans l'IR proche pour caractériser et classifier l'état et de la structure d'échantillons de tissus se basant sur les particularités d'absorption liées à teneur en graisses des tissus adipeux, et sur une méthode d'estimation de l'épaisseur des plis cutanés. Cette démarche, qui fournit des informations sur les sources de différenciation des tissus, est de ce fait utile pour établir des catégories générales de structure des tissus. La catégorisation des sujets en fonction de cette détermination convient pour d'autres analyses spectrales, et pour la mesure de composés biologiques ou chimiques tels que des analytes sanguins. L'invention porte également sur une méthode d'estimation du pourcentage de graisse corporelle basée sur une estimation de l'épaisseur d'un pli cutané, et sur un appareil de mesure du spectre d'absorption, couplé à un processeur numérique, et effectuant les analyses requises.

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