Abstract #3530

Very high order B0 Shimming of the human brain at 9.4 T considering Real B0 Shim Fields

Paul Chang^1,2, Sahar Nassirpour^1,2, and Anke Henning^1,3

¹Max Planck Institute for Biological Cybernetics, Tuebingen, Germany, ²IMPRS for Cognitive and Systems Neuroscience, Eberhard Karls University of Tuebingen, Tuebingen, Germany, ³Institute for Biomedical Engineering, UZH and ETH Zurich, Zurich, Switzerland

A highly homogeneous B0 field is essential if we are to exploit the advantages of higher field strengths for MR applications. In this work, we model the real field of each shim channel of a 4th order shim system for a 9.4T MR system for in vivo B₀ shimming applications. Each shim channel is modelled at a range of frequencies to account for the possibility of amplitude nonlinearities.

By modelling the fields generated by each shim channel, we were able to achieve better shim qualities than if perfect fields were assumed.

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