Ha-Kyu Jeong1,2, Adam W. Anderson1,2,
John C. Gore1,2
1Vanderbilt University Institute of
Imaging Science, Nashville, TN, United States; 2Department of
Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN,
United States
We
developed a simple reconstruction method for multi-shot SENSE diffusion
weighted data using an interleaved EPI sequence. The reconstruction was done independently
for each column of the image by combining image unwrapping and phase
corrections. To estimate shot-to-shot phase variations due to subject motion
during diffusion encoding, a 2-D navigator-echo acquisition was used
following the image-echo acquisition. Both of the echo acquisitions were
SENSE accelerated reducing scan duration, susceptibility and T2* effects. Our
reconstruction method and pulse sequence produced diffusion weighted images
free of ghost artifacts at 7 Tesla.
Keywords