Figure 2

Simulated and measured transmit (B1 +) fields in an oil phantom. (a) B1 + maps and the experimentally acquired low flip angle gradient echo images: (left to right) no artificial structure; with dielectric material only; with the metasurface structure. (b) Measured (solid line) and simulated (dashed line) B1 + profile, along the yellow dashed line. Supporting Information S3 includes an illustration of the experimental setup.