Hua Guo1, Iliyana Atanasova1,2, Ruth P. Lim1, Pippa Storey1, Jian Xu3, Qun Chen1, Henry Rusinek1, Zhaoyang Fan4, Debiao Li4, Vivian S. Lee1
1Department of Radiology, New York University School of Medicine, New York, NY, United States; 2Columbia University, New York, NY, United States; 3Siemens Medical Solutions USA, Inc., MR R&D Collaboration, New York, United States; 4Departments of Radiology and Biomedical Engineering, Northwestern University, Chicago, IL, United States
Flow-sensitive dephasing prepared balanced steady state free precession (FSD-bSSFP) has been proposed as a non-contrast MRA technique for the lower extremities at 1.5T. However, its application at higher magnetic fields is hindered by poor B0 and B1 homogeneities. As a result, the background signal cannot be completely suppressed. In this work, we investigated the performance of B1-insensitive adiabatic RF pulses for FSD preparation to improve non-contrast MRA with FSD-bSSFP at 3T. The results demonstrate that the approach is less B1-sensitive than with conventional hard RF pulses, thus providing better background signal suppression and more reliable MRA images at 3T.