Abstract #3373

Quantification of Left Ventricular Torsion by Off-Resonance Insensitive CSPAMM (ORI-CSPAMM)

Meral Reyhan^1,2, Daniel B. Ennis^2,3

¹Department of Radiological Sciences, Diagnostic Cardiovascular Imaging Section, University of California, Los Angeles, CA, United States; ²Biomedical Physics Interdepartmental Program, University of California, Los Angeles, CA, United States; ³Department of Radiological Sciences, Diagnostic Cardiovascular Imaging Section, University of California , Los Angeles, CA, United States

The objective of this study was to evaluate the FAST (Fourier Analysis of STimulated echoes) method for quantifying left ventricular (LV) torsion in five healthy volunteers using Off-Resonance Insensitive CSPAMM (ORI-CSPAMM), which adds a 180 RF refocusing pulse in the middle of the motion encoding gradient. There was excellent agreement between SPAMM and ORI-CSPAMM torsion estimates with a bias of -1.5 and 95% CIs(-4.0, 0.9). The mean peak systolic torsion was 8.92.1 for ORI-CSPAMM and 7.42.2 for SPAMM. ORI-CSPAMM permits the FAST analysis of LV torsion during systole and diastole and may report more accurate values due to the refocusing.