GRAPPA Operator Shift Correction for Non-Cartesian Imaging Trajectories

Keywords

able accelerated acquisition actual amplitude applied approximate array artifacts assumed assumes assumption backtracking cause channel closest coil combining commonly complete complex compute computed concept consistent constrained consuming correct corrected correction coupling cross deemed definitions delay delays depending dept derived described desired determined deviation distance easily eddy either errors extended extent extra field finally find funding gated give golden gradient grants greater grog held highest ideal illustrated illustrates illustrating implementation individual initiated iteration iterative iteratively leading localized location locations magnitude majority mark marked measured measuring medical mismatches motion navigators needed newly next offset operator originally otherwise part path paths peak perpendicular phenomena position presence produces projection projections propose proposed radial radiology read readout reasonable receive reconstructed reduce require reserve retrospective sampled sampling scanning schemes segment self several short since situation solutions source space spoke spokes squares stable steady system target thick though timing trajectories trajectory translated traversed true useful view western yielding