Figure 2.

Description of the combined gradient∕rf manipulations underlying the indirect-domain spatial encoding strategies considered in this work. (a) Discrete real-time scheme involving a train of π∕2 pulses applied in synchrony with an oscillating ±G_e waveform. (b) Continuous real-time scheme whereby chirped excitation and storage π∕2 pulses are applied in the presence of a single bipolar ±G_e oscillation. (c) Idem but based on a phase-modulated, constant-time spin evolution imparted by a pair of chirped π pulses. Spatiotemporal encoding efficiencies for the different sequences are C=N₁Δt₁∕L, $t_1^{\max }∕L$, and $2t_1^{\max }∕L$, respectively; the timings n Δt₁, t₊(z), and t₋(z) refer to the fate of the lightest (yellow) z coordinate.