James H. Holmes1, Philip J. Beatty2,
Howard A. Rowley3,4, Zhiqiang Li5, Ajeetkumar Gaddipati6,
Xiaoli Zhao6, Reed F. Busse1, Jean H. Brittain1
1Applied Science Laboratory, GE
Healthcare, Madison, WI, United States; 2Applied Science
Laboratory, GE Healthcare, Menlo Park, CA; 3Radiology, University
of Wisconsin-Madison, Madison, WI, United States; 4Neurological
Surgery, University of Wisconsin-Madison, Madison, WI, United States; 5GE
Healthcare, Phoenix, AZ; 6GE Healthcare, Waukesha, WI, United
States
A
novel parallel imaging technique for PROPELLER that utilizes external
calibration data as well as a small amount of internal calibration data per
blade is demonstrated for T1 FLAIR imaging. Short echo trains, which are
optimal for T1 imaging, are maintained while the effective blade width is increased
by reducing the number of internal calibration lines. Wider blades enable motion to be detected
and corrected more reliably, improving robustness in uncooperative
patients. The method is validated in
studies of volunteers instructed to move their head during the acquisition.