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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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