System and method for identifying optimized blood signal in...

A - Human Necessities – 61 – B

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A61B 5/05 (2006.01)

Patent

CA 2560537

In a sequence of medical image data showing tumors and blood vessels, a plasma signal is optimized to avoid flow artifacts by receiving a user input of a blood region and using the user input to seed an automated search. Each voxel is scored by time point of maximum intake, slope at maximum intake, peak value and conformance to a gamma variate curve, and the voxels with the highest scores are included in the ideal plasma region of interest. Uptake curves for both tumors and plasma are determined and used to estimate a volume transfer constant.

La présente invention concerne, dans une séquence d'images médicales numérique montrant des tumeurs et des vaisseaux sanguins, à optimiser le signal du plasma de façon à pouvoir éviter les artéfacts de flux en recevant une entrée utilisateur d'une région du sang et en utilisant l'entrée utilisateur pour semer une recherche automatisée. Chaque voxel fait l'objet d'une évaluation portant sur l'instant d'absorption maximale, de la pente en absorption maximale, de valeur de pointe et de conformance par rapport à une courbe de la variable aléatoire gamma, les voxels étant les mieux notés étant inclus dans la région de plasma idéale à étudier. On calcule les courbes d'absorption pour aussi bien les tumeurs que le plasma, et on les utilise pour calculer une constante de transfert de volumes.

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