Girish Srinivasan1,2, 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
PROPELLER
imaging has increasingly been used in motion-sensitive applications such as
long anatomic scans and diffusion imaging. EPI-PROPELLER provides short scan
times but is susceptible to off-resonance artifacts, producing distorted
images. FSE-based PROPELLER, on the other hand, offers excellent immunity
against off-resonance artifacts at the expense of acquisition efficiency. We
propose a new PROPELLER sequence - Steer-PROP - which mediates the problems
in EPI- and FSE-PROPELLER. This sequence has reduced the scan time by at
least 3 times as compared to FSE-PROPELLER and avoided the off-resonance
artifacts in EPI sequences. Steer-PROP
also provides a natural mechanism to effectively address a long-standing
phase correction problem.