Fig. 1.

Inversion pulse performance. Plots show the response to B ₀ (vertical) and B ₁ (horizontal) of two different adiabatic inversion pulse designs: Hyperbolic Secant and Tan/Tanh (T ₁ = 1000 ms, T ₂ = 45 ms). A contour value −1.0 would indicate perfect inversion. The “design region”, enclosing the maximal likely in vivo cardiac B ₀ and B ₁ distortion, is represented by the dotted green box.

Adapted with permission from Kellman et al. [40]