Cardiac motion estimation by joint alignment of tagged MRI sequences

► We tackle the recovery of dense myocardial deformations and strains from tagged MRI. ► k-Nearest Neighbors Graphs to assess the joint similarity between frames. ► kNNGs combined information from different cardiac views in an unified metric. ► Significantly higher accuracy compared to standard pairwise alignment was shown. ► Strains in patients with myocardial infarction was studied and evaluated.