OPTICAL SYSTEM AND METHOD FOR MONITORING BIOLOGICAL TISSUE CONDITION

An imaging system and method are presented for inspection of a biological tissue to determine at least one predetermined tissue property. The system comprises an illumination unit producing a plurality of wavelengths of at least visual spectral range, an optical detector generating image data indica...

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Bibliographische Detailangaben
Hauptverfasser: ALLON, Noam, SAVATEIV, Yuval, GAMLIEL, Avihu Meir, MARGALIT, Eyal, ARONOV, Michael, KOSTENICH, Genady
Format: Patent
Sprache:eng ; fre
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Zusammenfassung:An imaging system and method are presented for inspection of a biological tissue to determine at least one predetermined tissue property. The system comprises an illumination unit producing a plurality of wavelengths of at least visual spectral range, an optical detector generating image data indicative of light response of the tissue to the illumination, an illumination controller, and a control system which analyzes the image data by determining a relation between responses of the tissue to different illumination wavelengths. The illumination controller is adapted to selectively operate the illumination source to generate a number M (M^2) of wavelengths forming at least one group of two or more illuminating wavelengths such that the relation between the light responses of the tissue to the illuminating wavelengths of the group is indicative of the predetermined tissue property(ies) at a corresponding depth in the tissue. Each group of wavelengths comprises first and second wavelengths satisfying the following conditions: (1) the wavelengths of the group are spectrally close to one another therefore being characterized by substantially the same penetration depth in the tissue, and (2) the wavelengths of the group comprise at least one first wavelength and at least one second wavelength whose interactions with the tissue are characterized by, respectively, first and second substantially opposite absorption properties, i.e. each first wavelength is substantially affected by said tissue property while each second wavelength is weakly affected by said tissue property. La présente invention concerne un système et un procédé d'imagerie pour l'inspection d'un tissu biologique afin de déterminer au moins une propriété de tissu prédéterminée. Le système comprend une unité d'éclairage produisant une pluralité de longueurs d'onde d'au moins une plage spectrale visuelle, un détecteur optique générant des données d'image indiquant la réponse lumineuse du tissu à l'éclairage, un dispositif de commande d'éclairage, et un système de commande qui analyse les données d'image en déterminant une relation entre les réponses du tissu à différentes longueurs d'onde d'éclairage. Le dispositif de commande d'éclairage est conçu pour faire fonctionner sélectivement la source d'éclairage afin qu'elle génère un nombre M (M^2) de longueurs d'onde formant au moins un groupe d'au moins deux longueurs d'onde d'éclairage de sorte que la relation entre les réponses lumineuses du tissu aux