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Global and dynamic shimming with the scanner’s inbuilt shim system and a custom-made multi-coil setup at 9.4 T

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Aghaeifar,  A
Max Planck Institute for Biological Cybernetics, Max Planck Society;
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Zivkovic,  I
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Mirkes,  C
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Steffen,  T
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Scheffler,  K
Max Planck Institute for Biological Cybernetics, Max Planck Society;
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Aghaeifar, A., Zivkovic, I., Mirkes, C., Steffen, T., & Scheffler, K. (2017). Global and dynamic shimming with the scanner’s inbuilt shim system and a custom-made multi-coil setup at 9.4 T. Poster presented at 25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2017), Honolulu, HI, USA.


Cite as: http://hdl.handle.net/21.11116/0000-0000-C4C3-6
Abstract
The homogenization of static magnetic field (B0) is necessary for MR imaging. The unwanted B0 inhomogeneity becomes more pronounced in ultra high field, and the scanner's inbuilt shim setup can not compensate the B0 fluctuation as is needed. Here we propose to use combined setup of the multi-coil approach and the scanner's shim setup to achieve higher homogeneity of B0 field. We employed custom-built multi-coil for slice-wise shimming in combination with the scanner's shim setup for global shimming. The results show improvement about 50 compare to dynamic shimming alone in the most of the slices.