Dear FSL experts,
I'm experiencing some problems with non linear registrations that I really can't figure out.
After using FLIRT, registering the structural brain to the MNI template, I apply FNIRT for the non linear registration. However, I have few subjects in which FNIRT always seems to fail, as in the final outputs I get some very weird warps on the brain (Looks a lot like a badly deformed brain). I tried to change all the possible cost functions, to increase the warping resolution to 6 and change Lambda to 400, 200,150, 75, 60, 45, but the problem is always there.
Does someone have any idea of what can be causing these deformations? Any suggestion on how to solve this?
Thank you so much!!
All the best,
Giulia
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