Williams LK, Urbano-Moral JA, Rowin EJ, Jamorski M, Bruchal-Garbicz B, Carasso S, Pandian NG, Maron MS, Rakowski H. Velocity vector imaging in the measurement of left ventricular myocardial mechanics on cardiac magnetic resonance imaging: correlations with echocardiographically derived strain values. J Am Soc Echocardiogr. 2013 Oct; 26(10):1153-1162.