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Abstract #2428

Static Magnetic Field Inhomogeneity Correction of Radial MRI Using an Alternating Gradient Readout Acquisition

Xuelin Cui1, John C. Gore2, 3, E. Brian Welch2, 3

1Biomedical Engineering, Vanderbilt university, Nashville, TN, United States; 2Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN, United States; 3Institute of Imaging Science, Vanderbilt University, Nashville, TN, United States

Static magnetic field (B0) inhomogeneity is one of the major causes of artifacts in MRI. Although numerous correction methods have been implemented for Cartesian k-space, relatively little investigation has been conducted for radial MRI. B0 inhomogeneity can cause signal displacement in image space along the frequency encode direction. In this work, a previously described reverse gradient method (Fitzpatrick JM et al., IEEE TMI, 1992) is applied to correct radial MRI data without prior knowledge of the B0 inhomogeneity.