METHOD FOR PRODUCING MAGNET RESONANCE TOMOGRAPHY RECORDINGS OF CYCLIC MOVEMENT

摘要

Method for producing magnetic resonance tomography images (B) of at least one phase of a cyclic movement, comprising the method steps: production of raw data sets (rl... rx) of the cyclic movement during a recording period (T) having radial or almost radial k-space part trajectories (kl... kx); reconstructing of a series of intermediate images (zl... zy), each from at least one raw data set (rl... rx) with high time resolution at least for each region (region of interest, ROI) of the raw data sets (rl... rx); calculation of a distance matrix (D) from the series of intermediate images (zl... zy), wherein each matrix element (D) corresponds to the distance of a first intermediate image (zl... zy) of the series to the first or a further intermediate image (zl... zy) of the series; fitting of functions (vi... vz) to structures forming in the distance matrix (D) by means of an active contour method and reconstruction of at least one image (B) from the raw data sets (rl... rx), said raw data sets corresponding to intersection (S) of the fitted curves (vl... vz) with a line of the distance matrix (D).