Automatic multi-dimensional intravascular ultrasound image...

G - Physics – 06 – T

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G06T 5/00 (2006.01) A61B 8/00 (2006.01) G06T 7/00 (2006.01)

Patent

CA 2587417

The present invention generally relates to intravascular ultrasound (IVUS) image segmentation methods, and is more specifically concerned with an intravascular ultrasound image segmentation method for characterizing blood vessel vascular layers. The proposed image segmentation method for estimating boundaries of layers in a multi-layered vessel provides image data which represent a plurality of image elements of the multi-layered vessel. The method also determines a plurality of initial interfaces corresponding to regions of the image data to segment and further concurrently propagates the initial interfaces corresponding to the regions to segment. The method thereby allows to estimate the boundaries of the layers of the multi-layered vessel by propagating the initial interfaces using a fast marching model based on a probability function which describes at least one characteristic of the image elements.

La présente invention porte, en général, sur des procédés de segmentation en imagerie ultrasonore intravasculaire, et en particulier, sur un procédé de segmentation d'image intravasculaire par ultrason visant à caractériser des couche vasculaires d'un vaisseau sanguin. Le procédé de segmentation précité visant à évaluer les limites des couches dans un vaisseau multicouche génère des données d'image qui représentent une pluralité d'éléments d'image du vaisseau multicouche. Le procédé permet également de déterminer une pluralité d'interfaces initiales correspondant à des régions des données d'image à segmenter et permet également de propager concurremment les interfaces initiales correspondant aux régions à segmenter. Le procédé permet ainsi d'évaluer les limites des couches du vaisseau multicouche par propagation des interfaces initiales en utilisant un modèle de progression rapide sur la base d'une fonction de probabilité qui décrit au moins une caractéristique des éléments d'image.

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