Hi Steven,
Thanks a lot for the reply. After looking a lot at other posts in neurostars (https://neurostars.org/t/fmriprep-ica-aroma-filtering-including-wm-csf-etc-confounds-in-fsl-regfilt/3137/2 I had ultimately decided to recompute the regressors from the cleaned data mainly because fsl crashes if I put too many regressors due to RAM issues (so adding that many components of the ICA might be an issue). Also that would constitute as aggresive AROMA right (there will be shared variance between the components and the regressors that I want to add (CSF, WM)?
Just to clarify I would simply want to recalculate the regressors for CSF, WM and GS from the cleaned-ICA ARoma output (in order to only add those in the GLM)
THanks again for your help,
George