Patent ID: 7840049

Claim:
A magnetic resonance tomography apparatus comprising: a magnetic resonance scanner adapted to interact with a subject to obtain a magnetic resonance dataset therefrom; a control computer that enters, said dataset in a memory organized as a matrix representing k-space; and said control computer being configured to sample said data in k-space in a number of data subsets, which respectively represent blades in a PROPELLER magnetic resonance imaging technique with sampling points of each data subset corresponding to grid points of an a Cartesian initial grid that is used in common for all of said data subsets, and wherein the respective data subsets in the initial Cartesian initial grid can be brought into congruence by rotation, and to select a Cartesian final grid for use in common for all of said data subsets, performing a transformation calculation on the data points of each data subset to transfer the data points of each data subset to a respective new grid that exhibits an orientation of the data subset and grid constants of said final grid if said grid constants of said new grid differ from grid constants of said final grid, performing a transformation calculation on said data points of each data subset, or on data points of each new grid, to said final grid, by applying a rotation module selected from the group consisting of a rotation module based on successive shear and a rotation module based on chirp-z-transformation, to generate acquired data, and transforming said acquired data in the image domain.