David Otto Brunner1, Simon Gross1, Jonas Reber1, and Klaas Paul Pruessmann1
B0 shimming with very high channel count
encounters many implementation problems due to the size and current handling requirements
of the shim units. Here we present an approach using distributions of
ferromagnetic materials with controllable magnetic moments to generate shim
fields. These units are small, require only low currents and can hence be implemented
in large numbers into RF receive arrays.