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Non-Cartesian SPIRiT reconstruction from 3-fold undersampled spirals and 4 channels. (a) Reconstruction from fully sampled data. (b) Gridding with density compensation (c) Pseudo-Cartesian GRAPPA /w GROG (d) k-space SPIRiT with Kaiser-Bessel interpolator kernel (e) k-space SPIRiT with flat pass band interpolator kernel (f) Image-space SPIRiT
