k-t undersampled multiband first-pass perfusion imaging provides in-plane and through-plane acceleration and potentially enables high spatial resolution and whole-heart coverage. Our slice-L+S work splits MB data consistency and enforcing L+S into two subproblems wherein MB data, in- and through-plane coil information and L+S properties of slices are systematically utilized. Here we compare slice-L+S to single-band L+S and slice-GRAPPA followed sequentially by L+S (seq-SG-L+S) using 3 retrospectively undersampled datasets. High resolution nine-slice data with multiband factor-3 and rate-3 undersampling were prospectively acquired in 4 patients. Slice-L+S showed better image quality demonstrated by quantitative results and scores from two cardiologists.
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