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Point spread function in x-f space of a multiband factor 2 acquisition using a purely random undersampling scheme (left), the proposed pseudorandom undersampling scheme (middle), and a TGRAPPA linear undersampling scheme (right). The phase-cycling scheme used the results in a spatial displacement of slice 1 and slice 2 by +1/4 FOV and -1/4 FOV in the phase-encode dimension, respectively
