FIG. 1.

a: Perfluorooctyl bromide (PFOB: CF₃-(CF₂)₆-CF₂Br)¹⁹F spectrum. b: All chemical shift components of PFOB CF₂ line group (β, γ, δ, ε, ζ, ρ) remain within a phase range of ± 90° for 0.5 ms. c: ¹⁹F signal evolution of the (CF₂)₆ line group with and without apparent T₂’ relaxation. During a fast FID readout as in the balanced UTE-SSFP technique (shaded region), the relative signal remains above 60%, which cannot be recovered for later echo times.