DTI tutorial for FSL
Check out this website for a great tutorial of diffusion tensor imaging analysis using FSL. It will give you an overview of how to use the FDT Diffusion tool for diffusion imaging analysis, and how you can use MedINRIA (med.inria.fr) to visualize the tracts.
Written by Leigh Morrow, Paul Morgan and Chris Rorden, you can find their site here:
Additionally check out the lecture on DTI developed by FSL for more information on Tract-Based Spatial Statistics: