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 2^ndorder 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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