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Abstract #1833

Improvements from local B0 shimming for QSM at 7 Tesla

Sina Straub1, Mark E. Ladd1,2, Paul Chang3, and Sahar Nassirpour3
1Division of Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, 2Faculty of Physics and Astronomy, Faculty of Medicine, University of Heidelberg, Heidelberg, Germany, 3MR Shim GmbH, Reutlingen, Germany

A 14-channel local array of shim coils was used to improve B0 homogeneity and reduce artifacts in quantitative susceptibility mapping at 7T. Using the local array of shim coils in addition to the standard 2nd order spherical harmonic shims, the B0 shim quality was improved by an average of 16% across all volunteers. Local inhomogeneities were significantly reduced and could be correlated to reduced artifacts in QSM.

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