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Point spread function (PSF) analysis of the MB = 1, and the interference pattern added by the additional excited slices for MB = 2, 3 and 4 acquisition. The majority of the main lobe energy is cancelled for MB slices 2–4 due the phase sampling scheme. The side lobe amplitude is only 6% of the main lobe amplitude for the MB1 PSF, and has an incoherent pattern suitable for SMS-L1-SPIRiT reconstruction.
