Abstract #0990

Harmonic-Phase versus Sine-Wave Modeling for Measuring Regional Cardiac Function from Tagged MRI Images

El-Sayed H. Ibrahim¹, Scott Swanson¹, Jadranka Stojanovska¹, Claire Duvernoy¹, and Rodica Pop-Busui¹

¹University of Michigan, Ann Arbor, MI, United States

MRI tagging is a valuable method for evaluating regional heart function. This study compares the harmonic-phase (HARP) and sine-wave modeling (SinMod) tagging analysis techniques for evaluating myocardial strain and torsion in healthy controls and type-1-diabetes patients. All SinMod measurements were significantly larger than those by HARP. Nevertheless, there existed consistency in the measurements by each technique, as seen by the good correlation between the HARP and SinMod measurements in both normals and patients, except for apical strain (patients and controls) and mid-ventricular strain in patients. The inter-observer agreement was better in SinMod than in HARP for both torsion and strain.

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