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Abstract #3105

In-vivo B0 shimming of the liver using a local array of shim coils in combination with 2nd order spherical harmonics at 7T

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

Maximizing shim performance, particularly for larger organs such as the liver, is crucial at ultra-high field MRI due to the increased sensitivity to B0 field inhomogeneity. The conventional shimming in most MRI systems at ultra-high field, provides insufficient correction. However, by combining the available 2nd order spherical harmonic fields with an external array of 16 local shim coils, the magnetic field homogeneity in the liver is improved by as much as 44%.

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