Yao-Hao Yang1, Teng-Yi Huang, Fu-Nien Wang2,
Nan-Kuei Chen3
1National Taiwan University of Science
and Technology, Taipei, Taiwan; 2Department of Biomedical
Engineering and Environmental Sciences, National Tsing Hua university; 3Brain
Imaging and Analysis Center, Duke University Medical Center
Phase
modulation combined with field mapping can correct the EPI geometry
distortion but it is a time-consuming algorithm. We proposed to incorporate
the GPGPU technique into phase-modulation calculation to reduce the whole
computation time. Applying on the PROPELLER EPI data set, the parallel
algorithm reduced the computation time from ~1750 seconds to ~100 seconds. We
conclude that the GPU computing is a promising method to accelerate EPI
geometry correction.
Keywords