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Abstract #3776

Correction of Gradient-Induced Phase Errors in Radial MRI

Amir Moussavi1, 2, Markus Untenberger1, Martin Uecker3, Jens Frahm1, 2

1Biomedizinische NMR Forschungs GmbH, am Max-Planck-Institut fr biophysikalische Chemie, Gttingen, Niedersachsen, Germany; 2DFG Research Center for Molecular Physiology of the Brain (CMPB), Gttingen, Niedersachsen, Germany; 3Dept. of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, United States

Gradient-induced eddy currents affect the MRI data acquisition by gradient delays and phase errors that may lead to severe image artifacts. This work introduces a robust method for quantifying and correcting phase errors in radial MRI without the need of complementary measurements. The proposed method yields a specific phase error per gradient that can be used for correcting the raw data. It is also able to distinguish between and separately correct for phase errors due to eddy currents caused by the in-plane gradients and other phase alterations which are constant for an image and that may carry relevant physiologic information.