Abstract #3340

Non-Contrast-Enhanced Peripheral MRA: Comparison of 3D Fast Spin-Echo Based & Flow Sensitive Dephasing Prepared Steady State Free Precession Techniques at 1.5 T

Ruth P. Lim¹, Zhaoyang Fan², Manjil Chatterji³, Amanjit Baadh⁴, Iliyana Atanasova⁴, Pippa Storey⁴, Danny C. Kim⁴, Sooah Kim⁴, Philip Hodnett⁴, Afshan Ahmad⁴, David Stoffel⁴, James S. Babb⁴, Daniel Kim⁴, Qun Chen⁴, Jian Xu⁵, Debiao Li^2,6, Vivian S. Lee^4,6

¹Radiology , NYU Langone Medical Center, New York, NY, United States; ²Radiology, Cedars-Sinai Medical Center and UCLA, Los Angeles, CA, United States; ³Radiology, Mt Sinai School of Medicine, New York, NY, United States; ⁴Radiology, NYU Langone Medical Center, New York, NY, United States; ⁵Siemens Healthcare, New York, NY, United States; ⁶Co-Senior Author

Slow arterial flow in the below-knee vessels is challenging for ECG-gated flow-dependent non-contrast-enhanced MRA techniques. We evaluate the performance of variable (VFA MRA) and constant (CFA MRA) flip angle fast spin echo MRA, and flow sensitive dephasing prepared steady state free precession MRA (FSD MRA) in a clinical population. Our results show comparable accuracy between the three sequences, with gadolinium-enhanced MRA as the reference standard. Image quality was highest for FSD-MRA, and fast diastolic flow was problematic for VFA MRA due to flow dephasing in diastole.