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. Author manuscript; available in PMC: 2017 Feb 1.
Published in final edited form as: Magn Reson Med. 2015 Mar 11;75(2):883–896. doi: 10.1002/mrm.25648

FIGURE 2.

FIGURE 2

(a) Workflow for GROG-based trajectory estimation and signal correction for radial trajectories. Multi-channel radial data is first subject to a phase correction (b) to estimate and remove the mean parallel component of the k-space trajectory error. GROG is then iteratively applied to the phase-corrected signal to determine the residual trajectory error from each recentered projection. The trajectory estimate is used to reconstruct a corrected image from the acquired miscentered signal.