I understand that fmriprep follows the protocol in this ICA-AROMA paper, where they use a 6mm smoothing kernel. However, here one of the authors of that paper says that the 6mm was chosen as ceil(1.5 * the voxelsize). Shouldn’t this then also change in fmriprep? presumably that’s a very easy change? In my data, for example, the voxel size is 2mm isotropic and I’d like to use the non-aggressive AROMA denoised data, but smoothing with a 6mm kernel seems too much…
Does this make sense?