B1+ and Coupling Variability of Transmit Head Coils and Arrays for Ultra-High Field MRI: Simulation Studies and Experiments

Narayanan Krishnamurthy¹, Daniel Stough¹, Tiejun Zhao², Shailesh Raval¹, Fernando Boada¹, Tamer S. Ibrahim¹

Variation of spin excitation in surface/TX array and volume head coils were evaluated in these UHF MRI experiments. Phantoms with varying conductive and dielectric loads were used to evaluate the robustness of the TX B1+ field of different MR coils.