In Vivo Quantitative Mapping of Myocardial Stiffening and Transmural Anisotropy During the Cardiac Cycle. - Mathieu Couade; Mathieu Pernot; Emmanuel Messas; Alain Bel; Maguette Ba; Albert Hagege; Mathias Fink; Mickaël Tanter (IEEE Trans. Medical Imaging, 2011)