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Abstract #4583

STAGES: Dynamic Shimming by Nonlinear Phase Preparation & K-Space Parcellation in Steady-State MRI

Walter R. T. Witschey1, Christian A. Cocosco1, Daniel Gallichan1, Gerrit Schultz1, Hans Weber1, Anna Masako Welz1, Jrgen Hennig1, Maxim Zaitsev1

1Medical Physics, University Medical Center Freiburg, Freiburg i. Breisgau, Germany

A method is presented to dynamically shim a single spatially encoded volume in steady-state sequences. Nonlinear phase preparation is used to temporally disperse gradient echoes originating from different positions within a volume. These echoes are locally shimmed using a k-space parcellation algorithm. Simulations and experiments are performed to eliminate bSSFP stop band artifacts along the direction of phase encoding.