In dual-echo subtraction ZTE MRI, it is crucial to correct for gradient delays and phase offsets induced by eddy currents for high image quality. Relative phase correction is a data-driven approach to correct for the gradient hardware imperfection, but it requires that phase offsets induced by eddy current in positive and negative projections to be exact opposite of each other. This work has explored various radial trajectories to satisfy this condition in order to achieve optimal correction for gradient hardware imperfection in dual-echo subtraction ZTE MRI.
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