Hi FSL experts,
I am very new to fMRI processing and analysis. For a small project I have to implement group ICA for test for differences between patient groups.
I have implemented the Multi Session Temporal Concatenation ICA as per the with the standard options (as from tutorials etc.). The issue I encounter is with the registration of the output melodic_IC.nii.gz to the standard (I have selected MNI152 - 2mm) for registration. The reg_standard/filtered_func_data for all patients gets registered only to a matrix of size 70 83 70 instead of 91 109 91 of the standard templates. The 'standard' in the reg/ directory is correctly sized 91 109 91.
I have tried different registration methods
Any ideas as to why this would be happening would be great. I was under the assumption that the melodic_IC output gets registered to the standard template.? Or does this need to be registered separately after MELODIC?
Thanks a lot