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

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Chang,  YC
Research Group MR Spectroscopy and Ultra-High Field Methodology, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

/persons/resource/persons192740

Nassirpour,  S
Max Planck Institute for Biological Cybernetics, Max Planck Society;
Research Group MR Spectroscopy and Ultra-High Field Methodology, Max Planck Institute for Biological Cybernetics, Max Planck Society;

/persons/resource/persons84402

Henning,  A
Max Planck Institute for Biological Cybernetics, Max Planck Society;
Research Group MR Spectroscopy and Ultra-High Field Methodology, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Chang, Y., Nassirpour, S., & Henning, A. (2016). Very high order B0 Shimming of the human brain at 9.4 T considering Real B0 Shim Fields. Poster presented at 24th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2016), Singapore.


Cite as: http://hdl.handle.net/21.11116/0000-0000-7BAF-2
Abstract
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.