Abstract #0608
Image Domain Segmented Diffusion Imaging Using A 2D Excitation RF Pulse for Distortion Reduction
Yi Sui 1,2 , Frederick C. Damen 1,3 , Karen Xie 3 , and Xiaohong Joe Zhou 1,4
1
Center for MR Research, University of
Illinois at Chicago, Chicago, Illinois, United States,
2
Bioengineering,
University of Illinois at Chicago, Chicago, Illinois,
United States,
3
Department
of Radiology, University of Illinois Hospital & Health
Sciences System, Chicago, Illinois, United States,
4
Departments
of Radiology, Neurosurgery and Bioengineering,
University of Illinois Hospital & Health Sciences
System, Chicago, Illinois, United States
An image domain segmented acquisition technique has been
developed to reduce distortion in diffusion imaging. The
full FOV along the phase-encoding direction was divided
into N parallel segments and acquired sequentially using
a 2D RF excitation pulse. These image segments were then
combined using a weighting function determined by the
spatial excitation profile of the 2D RF pulse. Using
this technique, substantial reduction in geometric
distortion and signal pile up was demonstrated in human
brain diffusion images at 3T.
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