Reduction of B1 Inhomogeneity Using B1 Rectifying Fin at High Fields

Yukio Kaneko¹, Hideta Habara¹, Yoshihisa Soutome¹, Yoshitaka Bito¹

B₁ inhomogeneity in a human body increases as static magnetic field strength becomes higher, and various RF control methods have been developed to reduce B₁ inhomogeneity. However, B₁ inhomogeneity still remains in some cases of abdominal imaging, and a more effective method is necessary. We have proposed a new method using a B₁ rectifying finish combined with B₁ shimming. Both electromagnetic simulation with phantom and experiments with a human abdomen were conducted, and we confirmed that the B₁ rectifying fin, used with B₁ shimming, was more effective in reducing B₁ inhomogeneity than B₁ shimming alone.