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Abstract #3385

Characterization and elimination of X-nuclear eddy current artifacts on clinical MR systems

Mary A McLean1,2, Scott Hinks3, Joshua Kaggie1, Ramona Woitek1, Frank Riemer4, Martin Graves1, Dominick McIntyre2, Ferdia Gallagher1, and Rolf Schulte5
1Dept of Radiology, University of Cambridge, Cambridge, United Kingdom, 2Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, United Kingdom, 3GE Healthcare, Waukesha, WI, United States, 4MMIV, Dept of Radiology, Haukeland University Hospital, Bergen, Norway, 5GE Healthcare, Munich, Germany

Using pulse-acquire spectroscopy, line-shape distortions characteristic of eddy currents were demonstrated for X-nuclei, which were not seen for 1H, on systems from multiple vendors. The severity of these appeared correlated with the amplitude of the f0 eddy current frequency compensation term applied by the system along the axis of the applied spoiler gradient. A proposed correction to eddy current compensation taking account of the X-nuclear gyromagnetic ratio was shown to dramatically reduce these distortions on a GE system. The same correction was also shown to improve the quality of non-Cartesian imaging (spirals and cones).

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