James H. Holmes1, Philip J. Beatty2, Scott B. Reeder3,4, Zhiqiang Li5, Reed F. Busse1, Ajeetkumar Gaddipati6, 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; 4Medical Physics, University of Wisconsin-Madison, Madison, WI, United States; 5GE Healthcare, Phoenix, AZ; 6GE Healthcare, Waukesha, WI, United States
This work demonstrates the application of a shared calibration scheme for autocalibrated parallel imaging to enable greater blade acceleration for abdominal PROPELLER. The shared calibration method uses external calibration data as well as a small amount of internal calibration data per blade. The technique is shown to improve robustness to motion for free-breathing T2-weighted abdominal body imaging. Results were found to compare favorably to respiratory-gated Cartesian exams suggesting that the PROPELLER approach may allow robust imaging in individuals where respiratory gating is not effective.