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Bloch-simulated spoke placement algorithm comparisons for mitigating B1 inhomogeneity in the head-shaped water phantom at 7 T. Error and voltage statistics versus number of spokes used (T) are shown for the Fourier, inversion, and sparsity-enforced spoke placement methods. Upper-left: RMSE versus T. Lower-left: maximum error versus T. Upper-right: VRMS versus T. Lower-right: Vmax versus T. For all three algorithms, the duration of a T-spoke pulse is close to 0.26T + 0.34 ms.
