Dentsply Sirona Inc.
Method for producing magnet resonance tomography recordings of cyclic movement
Disclosed is a 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 (r1, . . . , rx) of the cyclic movement during a recording period (T) having radial or almost radial k-space part trajectories (k1, . . . , kx); reconstruction of a series of intermediate images (z1, . . . , zy), each from at least one raw data set (r1, . . . , rx) with high time resolution at least for each region (region of interest, ROI) of the raw data sets (r1, . . . , rx); calculation of a distance matrix (D) from the series of intermediate images (z1, . . . , zy), wherein each matrix element (D) corresponds to the distance of a first intermediate image (z1, . . . , zy) of the series to the first or a further intermediate image (z1, . . . , 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 (r1, . . . , rx), said raw data sets corresponding to intersection (S) of the fitted curves (v1, . . . , vz) with a line of the distance matrix (D).
DENTSPLY SIRONA INC.
G G A A G A G
G01R G01R A61B A61B G01R A61B G01R
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Volker Stefan
Rasche Wundrak