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GRAPPA (top) and RAKI (bottom) reconstruction of simultaneous multi-slice (SMS) echo planar images (EPI) of the brain. SMS imaging acquires multiple slices at the same time (16 in this example) and is traditionally reconstructed with GRAPPA. RAKI reconstruction of SMS-EPI brain images outperforms GRAPPA reconstruction with decreased noise (61). Figure courtesy of Mehmet Akcakaya.
