A method and apparatus for creating a color blood flow image...

A - Human Necessities – 61 – B

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A61B 8/06 (2006.01) G01S 15/89 (2006.01) G01S 7/52 (2006.01)

Patent

CA 2234191

A blood flow detection and imaging method and system is described for displaying images in accordance with signals transmitted from an intravascular ultrasound transducer probe. The image processor includes means for independently designating persistence factors for smoothing calculated speed and power of the dynamic portion of a field of view within a vasculature. Furthermore, the designation of a particular image point within a field of view as a dynamic image point (such as a blood flow region) as opposed to a static image point (such as a tissue region) is determined by averaging signal values for image points proximate to an image point of interest over both time and space.

Méthode et système de détection et d'imagerie du débit sanguin, permettant d'afficher des images en lien avec des signaux transmis par une sonde de transducteur intravasculaire. Le processeur d'images comporte une fonction de désignation indépendante de facteurs de persistance, afin de régulariser la vitesse et la puissance calculées de la partie dynamique d'un champ à l'intérieur d'un vaisseau sanguin. Par ailleurs, la désignation d'un point-image particulier à l'intérieur d'un champ, en tant que point-image dynamique (comme une zone de débit sanguin) en opposition avec un fond de point-image (comme une zone de tissu), est obtenue en calculant la moyenne des valeurs de signaux pour les points-images près d'un point-image d'intérêt dans le temps et l'espace.

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