RF Shimming via Efficient Modes for Massively Parallel Transmit Coils

Instead of using single coil elements as basis for RF shimming, we propose to use eigenmodes, which can be sorted by efficiency w.r.t. average B ₁ vs. power or global SAR. By using just most efficient modes, we inherently achieve a good compromise between homogeneity and power/SAR in a direct approach instead of a time-consuming traditional L-curve evaluation.

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