Zhaoyang Jin1, Qing-Sang Xiang2
1Institute of Information and Control, Hangzhou Dianzi University, Hangzhou, Zhejiang, China; 2Radiology Department, University of British Columbia, Vancouver, BC, Canada
Skipped phase encoding and edge deghosting (SPEED) is an effective method for scan time reduction. Previously, PE skip size was limited to be a prime number in order to avoid reconstruction difficulty in matrix inversion due to potential ghost phase degeneracy. This study revealed that while the prime number requirement is helpful, this restriction can be very much relaxed. Composite numbers combined with appropriately chosen PE shifts can also yield good reconstruction results. It was demonstrated that much more flexible data acquisition schemes can be used, offering significantly more freedom in practical implementations and applications.