RAPID PARALLEL RECONSTRUCTION FOR ARBITRARY K-SPACE TRAJECTORIES

摘要

FIELD: radio engineering, communication.;SUBSTANCE: invention can be used for magnetic resonance parallel imaging. The method comprises acquiring an under-sampled magnetic resonance partially parallel imaging (MR-PPI) dataset using a plurality of radio frequency receiving coils and reconstructing the under-sampled MR-PPI dataset to generate a reconstructed magnetic resonance (MR) image, wherein the reconstruction includes: (i) using a generalised auto-calibrating partially parallel acquisition (GRAPPA) operator or direct convolution to fill in at least some missing data of the under-sampled MR-PPI dataset so as to generate an enlarged dataset containing the under-sampled MR-PPI dataset and missing data filled in by the operation (i); and (ii) using an algorithm other than a GRAPPA operator and other than direct convolution to reconstruct the enlarged dataset or to reconstruct the under-sampled MR-PPI dataset using the enlarged dataset as an initialisation dataset for an iterative reconstruction algorithm.;EFFECT: enabling magnetic resonance partially parallel imaging with reduced image artefacts and faster acquisition of a dataset.;15 cl, 17 dwg