Reduced FOV imaging using ∆B0 control is limited by magnetostatics, but careful tracking of aliasing enables the vast reduction in the deselection volume required. A 2-sided spectral approach for the deselection enables the combination of strong linear gradients and adaptable multicoil shim array ∆B0 fields to perform selective excitation in concert. Simulations indicate potential for central volume rFOV where prior work in ∆B0-based rFOV imaging was limited to peripheral volumes.
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