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.