Abstract #0759

Fourier Analysis of STimulated Echoes (FAST) for Quantitative Analysis of Left Ventricular Torsion

Meral Reyhan¹, Daniel B. Ennis¹, Yutaka Natsuaki²

¹Radiological Sciences, University of California, Los Angeles, CA, United States; ²Siemens Medical Solutions USA, Inc., Los Angeles, CA, United States

Left ventricular (LV) torsion is an important measure of LV performance. This study validates a novel quantitative method (Fourier Analysis of STimulated echoes - FAST) for the rapid quantification of LV torsion by comparison to a gold standard method (FindTags) and finds no statistical difference between the methods in six canine studies. The intraobserver coefficient of variation (CV) for each observer was 4.2% and 2.3%. The interobserver CV was 8.4% and 5.4%. FAST analysis of LV torsion in six healthy-subjects demonstrates quantitation of systolic torsion and early untwisting. FAST is a highly reproducible and rapid (<3 minutes-per-study) quantitative method.