Selection of medical images based on image data

Details Selection of medical images based on image data Selection of medical images based on image data

G - Physics

06

T

G06T 5/00 (2006.01) G06T 7/20 (2006.01) G06T 11/00 (2006.01) A61B 6/00 (2006.01)

Patent

CA 2423485

Systems and methods for deriving a cardiac cycle signal by selecting images of a portion of a cardiovascular system include receiving a plurality of images from a scanner that have been recorded over a period of time. The images represent one or more locations along the extent of the cardiovascular system. The images are then selected based on common criteria determined from the plurality of images and without reference to an external signal. The common criteria comprises changes in the size of a cross section of the aorta, changes in the volume of the heart, changes in the area of a cross section of the heart. In addition, the criteria can include the mean pixel difference between adjacent images.

L'invention concerne des systèmes et des procédés permettant de dériver un signal de cycle cardiaque en sélectionnant des images d'une partie d'un système cardiovasculaire et consistant notamment à recevoir une pluralité d'images en provenance d'un scanner, enregistrées au cours d'une période. Ces images représentent une ou plusieurs zones situées le long du système cardiovasculaire. Les images sont ensuite sélectionnées en fonction de critères communs déterminés à partir de la pluralité d'images et sans référence à un signal externe. Ces critères communs comprennent des variations de la taille d'une section transversale de l'aorte, des variations du volume du coeur et des variations de la région d'une section transversale du coeur. La différence moyenne des pixels entre des images adjacentes peut également faire partie des critères.

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