Dear Christian,
thank you for your prompt answer and clarification. Sorry for the confusion, so I have done the preprocessing of the data with fmriprep and since it took a long time I thought maybe it is possible to use the T1 images for further VBM analysis with CAT12. But if I understood correctly, it makes more sense to processed the data with the standard CAT 12 pipeline since the output of the T1 images from the fmriprep are already normalised and thus altered in brain size which makes estimation of TIV not possible. Unfortunately
I did not know that in the fmriprep preprocessing pipeline also included estimation of TIV, which I did not do...
Thanks again!
Best,
Hamzah
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