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Three-dimensional (3D) strain maps of the myocardium provide a coordinate-system-independent quantification of myocardial deformation and kinematics. We combine two MRI techniques, displacement encoding with stimulated echoes (DENSE) and strain encoding (SENC), to fully formulate a 3D strain map in a single slice of myocardium. The method utilizes 2D DENSE in-plane displacement measurements in two adjacent slices in conjunction with a single SENC through-plane strain measure to calculate the 3D strain tensor. Six volunteers were imaged and the technique demonstrated 3D strain measures in all volunteers that are consistent with those reported in the literature from 3D tagging. The mean peak strain (+/- standard deviation [SD]) for six healthy volunteers for the first, second, and third principal strains are 0.42 +/-0.11, -0.10 +/-0.03, and -0.21 +/-0.02, respectively. These results show that this technique is capable of reliably quantifying 3D cardiac strain.

Original publication

DOI

10.1002/mrm.21984

Type

Journal article

Journal

Magn Reson Med

Publication Date

07/2009

Volume

62

Pages

77 - 84

Keywords

Algorithms, Echo-Planar Imaging, Elastic Modulus, Elasticity Imaging Techniques, Heart, Image Enhancement, Image Interpretation, Computer-Assisted, Imaging, Three-Dimensional, Magnetic Resonance Imaging, Cine, Motion, Reproducibility of Results, Sensitivity and Specificity, Stress, Mechanical