Is it possible to download the DTI images corrected for motion, eddy-current and echo-planar imaging (EPI) induced susceptibility artifacts? I've looked in the data archive and not seen anything that looks likely.
Thanks for your question to the ADNI MRI Core
ADNI does not offer motion corrected DTI images. In addition, for logistical reasons ADNI does not acquire phase encoding flipped images from GE and Siemens scanners. If you wish to correct for EPI distortion offline one could warp to the subject T1.
ADNI MRI