Figure 2.

ssMRE sequence for the stroboscopical encoding of continuous harmonic vibration fields (three Cartesian components of wave deflection) at three frequencies within a single image slice. A spiral readout trajectory was used; 100 images were acquired at instances demarcated by red vertical bars, while RF excitation was also applied when no signals were acquired (black bars) in order to maintain the steady state of magnetization. Vibration was initiated at the beginning of the sequence running continuously through the entire experiment for every driving frequency. All TR’s were synchronized to the vibration by adapting time τ, so that the wave phase was consistent throughout the accumulation of interleaved k-space trajectories. Each τ was computed by real-time analysis of pulse trigger and total vibration phase.