Novena Rangwala1,2, Xiaohong Joe Zhou1,3
1Center for Magnetic Resonance Research, University of Illinois Medical Center, Chicago, IL, United States; 2Department of Bioengineering, University of Illinois at Chicago, Chicago, IL, United States; 3Departments of Radiology, Neurosurgery and Bioengineering, University of Illinois Medical Center, Chicago, IL, United States
A new technique for phase correction of individual blades for EPI-PROPELLER sequences is proposed. Constant, linear, and oblique phase corrections are performed by synthesizing the reference scans for arbitrary blade orientations, using only two reference scans acquired in orthogonal directions. This technique was found to decrease the Nyquist ghost by at least 75%, yielding images comparable to those obtained by using time-consuming, blade-specific reference scans.