Fig. 7.

$B_1^{+}$ localized results at 9.4 T (400 MHz) by the pseudoinverse and iterative convex optimization methods. Note that the 16-channel head coil is used and each $B_1^{+}$ map has been normalized to its own maximum value. (a) Mask. (b)$\mid B_1^{+}\mid$ 〈Pseudoinverse〉.(c)$\mid B_1^{+}\mid$ 〈Convex optimization〉.