COMBINING IMAGE DATA FOR DYNAMIC PERFUSION COMPUTED TOMOGRAPHY

摘要

FIELD: physics.;SUBSTANCE: method of combining a data set of a 4-dimensional image with contrasting comprises a step of: combining image data corresponding to a plurality of time periods with a reference image from one of the time periods; image data are combined using an iterative combination algorithm based on gradients and a similarity factor; the combination algorithm is based on an optimisation algorithm via a stochastic gradient descent method, and the similarity factor includes a similarity factor based on normalised cross-correlation with a zero mean.;EFFECT: high accuracy of determining the movement of a mobile structure.;11 cl, 7 dwg