Fig. 1

Velocity-selective excitation scheme: Bipolar velocity encoding gradients (dark grey) are incorporated into the slice selection gradients of a 1–1 binomial excitation. The accumulated phase of moving spins between the two RF pulses can be used to tip-back magnetization into the longitudinal axis with the second RF pulse. The approach is similar to spectrally selective binomial excitation, with the key difference that phase is induced by velocity encoding gradients instead of chemical shift variations of different molecules. The proposed excitation can be combined with arbitrary single-shot sampling approaches, such as echo-planar or spiral imaging