A New Phase-Based Method for Rapid 3D B1 Mapping using Double RF Pulses

Yulin V. Chang¹

A fast, easy-to-implement, phase-based 3D B₁ mapping method is presented. This method uses a pair of orthogonal RF pulses to generate a flip-angle-dependent phase deviation of the magnetization vector from π/4. It is robust to T₁ and T₂ relaxations and the B₀ field inhomogeneity.