Dear FSL experts,
I want to register feat first level analysis results to MNI space.
I tried to use the files in reg directory and the code below:
applywarp -i thresh_zstat.nii.gz -r standard.nii.gz -o thresh_zstat-mni.nii.gz --postmat=example_func2standard.mat
But after the registration, the activations are not perfectly fitted to the MNI space brain and some of the activation clusters are outside of the brain. I checked the example_func2standard.nii, its brain is also bigger than MNI brain.
On the other hand, When I do the group analysis, the activation clusters are perfectly fitted to the MNI brain. My question is since the group level analysis doesn't perform a separate registration and only use the files in reg folder, how the group results are perfectly fitted to MNI brain? is there a way to improve first level results registration to MNI space?
Thank you for considering my request!
Best regards,
Mohammad
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