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Abstract #4220

B0 shimming of the liver using a local shim coil array at ultra-high-field MRI

Lieke van den Wildenberg1, Quincy van Houtum1, Wybe van der Kemp1, Catalina Arteaga de Castro1, Alex Bhogal1, Paul Chang2, Sahar Nassirpour2, and Dennis Klomp1
1Radiology Department, UMC Utrecht, Utrecht, Netherlands, 2MR Shim GmbH, Reutlingen, Germany

Ultra-high-field MRI is more sensitive to variations in the B0 field specially for larger organs such as the liver. Dynamic shimming using a local array of shim coils can potentially improve the field homogeneity by 18-46% when compared to the standard hardware correction methods at 7T. The use of local shim coil arrays embedded in RF receiver coils may become a good strategy when maximizing shim performance considering the limited available number of shim channels, particularly for larger organs such as the liver at ultra- higher field strengths.

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