In vivo assessment of biomechanical properties in the left ventricle carries substantial promises for disease characterization. Its proper quantification, however, is far from straightforward. We propose an ECG-gated 3D CINE GRE sequence with motion encoding gradients (TR=7ms) and time-shifted mechanical excitation to quantify the propagation of transient shear waves at a temporal resolution of 0.7ms. In-vivo results in anesthetised rats show apparent shear waves speeds around 8m/s at mid diastole, compatible with recent human in-vivo data.
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