RAPID TWO. STEP PARALLEL RECONTRUCTION FOR ARBITRARY K SPACE TRAJECTORIES INVOLVING A GRAPPA OPERATOR

摘要

An imaging method comprises acquiring an undersampled magnetic resonance partially parallel imaging (MR PPI) dataset using a plurality of radio frequency receive coils and reconstructing the undersampled MR PPI dataset to generate a reconstructed magnetic resonance (MR) image. The reconstructing includes: (i) using a generalized auto calibrating partially parallel acquisition (GRAPPA) operator or direct convolution to fill in at least some missing data of the undersampled MR PPI dataset so as to generate an enhanced dataset; and (ii) using an algorithm other than a GRAPPA operator and other than direct convolution to reconstruct the enhanced dataset or to reconstruct the undersampled MR PPI dataset using the enhanced dataset as an initialization dataset for an iterative reconstruction algorithm. In some embodiments the MR PPI dataset is a non Cartesian dataset and a GRAPPA operator for wider radial bands (GROWL) is used in the operation (i).