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Abstract #0244

Off-Resonance Self-Correction by Implicit Temporal Encoding: Performance at 7T

Franz Patzig1 and Klaas Paul Pruessmann1
1Institut for Biomedical Engineering, ETH Zurich and University of Zurich, Zurich, Switzerland


B0-induced distortions are a main caveat for trajectories with long readout durations, particularly at high field. Recently, B0 self-correction based on implicit temporal encoding by the coil array has been proposed and shown to be feasible at 3T. This work focuses on application of the approach at 7T. Performance analysis show that due to the increased strength of B0 inhomogeneities constant density bases to model B0 might not be sufficient. A variable density basis adapting to the gradient is proposed yielding spatially-dependent regularization. By means of this, reconstruction results can be improved demonstrating the feasibility of B0 self-correction at 7T.

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