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Abstract #4330

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

Ali Aghaeifar1,2, Irena Zivkovic1, Christian Mirkes1, Theodor Steffen1, and Klaus Scheffler1,3

1Max Planck Institute for Biological Cybernetics, Tübingen, Germany, 2IMPRS for Cognitive and Systems Neuroscience, University of Tübingen, Tübingen, Germany, 3Department of Biomedical Magnetic Resonance, University of Tübingen, Tübingen, Germany

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.

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