ABSTRACT
Magnetic resonance imaging (MRI) has been established as a valuable modality for measuring heart mechanics. Besides evaluating global heart function, for example, ventricular ejection fraction (EF), it allows for measuring regional myocardial deformation, for example, myocardial strain, strain rate, and torsion. Cine cardiac MRI images have been used for deriving cardiac functional parameters through geometrical, probabilistic, statistical, and mechanical modeling. Further, feature-tracking techniques have been recently implemented for measuring myocardial deformation directly from the cine images. Nevertheless, the invention of MRI tagging in the late 1980s allowed for visualizing transmural myocardial movement for the rst time without having to implant physical markers in the heart.
