MR imaging using stack of star collections with intrinsic motion corrections

摘要

The present invention relates to a method of MR imaging of an object (10).One object of the present invention is to enable MR imaging using a stack of stars or a stack of spiral scheme to provide enhanced image quality in the presence of motion.The method of the present invention isTargetBy applying an RF sequence and an imaging sequence having a switching magnetic field gradientGenerates an MR signalSignal data is collected according to the stack of stars or stack of spice schemeMR signalIt is collected as a radial or spiral K spatial profile from a plurality of parallel slices arranged adjacent to each other along the slice direction.In the collectionThe center (20) of the K space is sampled more closely than the peripheral region of the K spaceAn intermediate MR image (22-25) is reconstructed from sub sampled signal data for each of a plurality of consecutive time intervals;By registering the intermediate MR images (22-25) to each otherMotion induced displacement and / or deformation is derived.Combine subsampled signal dataThen the last MR image is reconstructed.Motion compensation is applied according to the derived motion induced displacement and / or deformationHas a group of steps.The present invention relates to a computer program for an MR apparatus (1) and an MR apparatus (1).