Quantitation of myocardial displacement (A,B) and circumferential strain (C). Example scatter plots of myocardial displacements in × (A) and y (B) directions from one volunteer. Linear regression showed good correlations of retrospectively rate-2 undersampled and fully-sampled DENSE data. The averaged correlation for all 5 volunteers is v=(1.01 ± 0.03)*u+(0.03 ± 0.009) with R2=0.993 ± 0.005. Circumferential strain (Ecc) from all 5 volunteers (C) showed typical values and patterns for healthy subjects.