Zheng Chang1, Qing-San Xiang2,3, Fang-Fang Yin1
1Department of Radiation Oncology, Duke University, Durham, NC, USA; 2Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, Canada; 3Department of Radiology, University of British Columbia, Vancouver, BC, Canada
The parallel imaging method of Skipped Phase Encoding and Edge Deghosting with Array Coil Enhancement (SPEED-ACE) is simplified with enhanced acceleration for imaging sparse objects; the method is termed S-SPEED-ACE that partially samples k-space with multiple coils in parallel and yields a deghosted image based on a least-square-error solution. Without differential filtering and full central k-space sampling, S-SPEED-ACE uses more straightforward reconstruction and achieves further scan time reduction as compared with SPEED-ACE. As demonstrated by a simulated scan using experimental head PC-MRA data, S-SPEED-ACE can achieve 8 times acceleration using 4 coils with reasonable image quality.