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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 Li2,6, Vivian S. Lee4,6

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.