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.