Hi FSLer,

I wonder if it's due to mis-registration between 4D DTI and MRI images? We used fairly low FOV to have more brain stem and save time in DTI scanning, thus, 4D images don't have top of head. BUT, FOV covered whole brain in MRI scanning. I ran a FLIRT those two images realigned perfectly. SO, I would like to know if the default setting of DITFIT is nonlinear? Although there is no results images was generated, but in fslviewer coordinates rages were changed from x=112 to -106 mm y=101 to -116 mm z= 101 to -83 mm to x=117 to -319 mm y= 322 to -114 mm z= 587 to -27 mm. Does anyone have some suggestions? Thank you in tons!

BW,
Joyce