An Adaptive Metasurface for Adjustable Magnetic Resonance Imaging Enhancement at 3 T and 7 T: A Feasibility Study.
PURPOSE Ultra-high field (≥ 7 T) and 3 T MRI suffer from B1 + inhomogeneity and signal loss. Conventional metasurfaces that mitigate B1 + inhomogeneity and improve image SNR are "fixed" in nature and designed for a single Larmor frequency. This study demonstrates the feasibility of an adaptive metasurface utilizing vol...