Dear FSLer,
I wonder if it's due to registration between 4D DTI and structural images? The FOV was close to bottom of the brain that gives more brain stem and it appears a chopped of top of brain in DTI, whereas we scanned whole brain in MRI. I ran a FLIRT with default settings, the results between 4D DTI and MRI data were perfectly realigned! Thus, I would like to know if registrations step in DTIFIT is linear or nonlinear? Thanks in tons!
bw,
Joyce
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