GRAPPA-based simultaneous multislice reconstruction using concentric ring k-space

A GRAPPA-based reconstruction method for non-Cartesian simultaneous multislice (SMS) imaging is presented. The method is non-iterative, decreasing image reconstruction time relative to iterative SENSE-based methods for non-Cartesian SMS. A concentric ring k-space trajectory is used, along with z-gradient blipping, to enhance the accuracy of GRAPPA weight calibration and subsequent slice separation. Preliminary results suggest good potential for use in fMRI or DTI experiments.

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