Abstract #0492

Magnetic Pebbles – Materials with Controllable Magnetism for Compact, Low-Power Shim Units

David Otto Brunner¹, Simon Gross¹, Jonas Reber¹, and Klaas Paul Pruessmann¹

¹Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland

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.

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