Blipped yz-Shimming to Correct for Geometric Distortions in Echo-Planar Imaging of the Human Spinal Cord

Keywords

able accordingly account accumulated accurate acquisitions adapted addition additional addressed almost analogously anatomical anatomy appears application applied appropriate artifacts background basic beck better blip blipped blips blue body cause caused causes channel characterized coil compensate compensated compensation completely compressed considered constable constant contrast cord correct corrected covered depict depicted desired determine distorted distortions easily echoes either encoding established examination examples feasibility field geometric geometry glover gradient gradients hamburg head healthy homogeneous human in vivo induce induced informed inhomogeneities insensitive intensity investigated involving known latter like linear losses magnitude maps medic medical modification modulate modulation moments momentum need offset opposite optimal optimized optimum partial pattern phantom planar polarity prior pulse pulses read readout receive reduced reflect related reliably require required resolutions respectively retained roughly seems setting shape sheared shim shimmed shimming simulated sketch slice space spacing spatial spinal stretched sufficient susceptibility system systems taking target train transformation trio upper volunteers water whole yielding yields