Robust implementation of 3D Bloch Siegert B1 mapping

This work describes time varying systematic errors of the Bloch-Siegert B1 mapping technique resulting from system instabilities and describes a robust implementation. The drift in resonance frequency due to hardware imperfections is shown for different preloads of the scanner and the corresponding measurement errors are determined for the conventional Bloch-Siegert acquisition and comparison with a reference method. By appropriate implementation the adverse influences can be suppressed.

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