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Comparison of sequence schematics. The STEAM sequence (a) runs over 2 cardiac cycles and the M2-SE (b) is triggered to every R-wave (labelled R here). The letters above the radiofrequency (RF) pulses indicate the axis that the corresponding slice selective gradient is played out. Tenc – time from R-wave to effective time of diffusion encoding, TM – mixing time, RR – RR-interval, Ttrigger – time from R-wave to central k-space line, Δ – the diffusion time of the sequence
