| 摘要 |
In a method for magnetic resonance imaging on the basis of a partial parallel acquisition (PPA) for projection reconstruction by exciting nuclear spins and measuring radiofrequency signals arising from the excited spins in the form of projection datasets, under-scanning of k-space with component coils and forming a complete projection dataset is undertaken by means of progressive rotation of a readout gradient through fixed step angles, a Cartesian resultant dataset is produced by transforming the projection dataset onto grid points of a first Cartesian grid with a first grid constant, a Cartesian reference dataset produced by transforming a central region of the projection dataset onto a second Cartesian grid having a grid constant that is smaller than that of the first grid, the sensitivities of the component coils are calculated on the basis of the reference dataset, and an output image is reconstructed on the basis of a linking of the calculated coil sensitivities of the component coils with the resultant dataset.
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