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Abstract #3803

Comparison of 2D and 3D Torsion Measured from Tagged Cardiac MRI

Bharath Ambale1, Steven Lloyd2, Himanshu Gupta2, Louis Dell'Italia2, Thomas Stewart Denney Jr. 1

1Department of Electrical and Computer Engineering, Auburn University, Auburn, AL, USA; 2Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, AL, USA

In tagged MRI, left ventricular torsion vs. time data is typically measured using by tracking an annular mesh in an apical and a basal slice with 2D HARP analysis. 2D techniques, however, do not account for through plane myocardial motion. This study compared the 2D HARP method with a recently developed 3D torsion vs. time method. While 2D and 3D rotation and torsion measurements were similar in subjects with low base-to-apex motion such as patients with myocardial infarction, The 3D method measured larger and probably more accurate rotation and torsion in subjects with normal or elevated base-to-apex motion.