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Abstract #4338

B0 shimming in a small volume at 9.4T – irregular coil geometry setup vs. loop coil setup

Irena Zivkovic1, Iliya Tolstikhin2, Bernhard Schoelkopf2, and Klaus Scheffler1,3

1High Field MRI, Max Planck Institute for Biological Cybernetics, Tuebingen, Germany, 2Empirical Inference, Max Planck Institute for Intelligent System, Tuebingen, Germany, 3Dept. for Biomedical Magnetic Resonance, University of Tuebingen, Tuebingen, Germany

At high magnetic fields B0 inhomogeneities are more pronounced and B0 shimming becomes very important. Dynamic or slice based shimming always provides better results than global or shimming in a volume. For shimming in a small volume, we propose a setup composed of irregularly shaped coils. Performances of the proposed setup are compared to performances of the configuration composed of only loop elements. The setup with irregular coils shows improved performances over the setup containing only loop elements. Future work should validate performances of the proposed setup on different volume sizes and different brain’s B0 maps.

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