Figure 4.

EM simulations using a human body model of the lower extremities. (a) EM simulations at the ³¹P frequency with and without metamaterial, placed under the calf muscle. (b) EM simulations for ¹H with and without metamaterial. Sagittal and axial cross sections through the calf are shown. The B₁⁺ maps are normalized to the square root of the maximum local SAR averaged over 10 g. The ³¹P maps are displayed with a “hot” color map, and the ¹H maps are displayed with a “jet” color map. A schematic cross-sectional overlay of the metamaterial (white) is shown in the images.