When running ICA-AROMA within fmriprep 1.2.4, BOLDs are automatically resampled. However, I would like to keep resampling to a minimum (and be able to use the brain masks provided by fmriprep). So I thought of manually smoothing my preprocessed BOLDs (MNI) using SUSAN and then removing fmriprep-derived components using fsl_regfilt.
Can anyone direct me to fmriprep’s implementation of SUSAN? Looking at these defaults (https://rdrr.io/cran/fslr/man/susan.html), I am not sure whether fmriprep used the very same ones (except for sigma, obviously)…
Also: Does anyone know why/at which step BOLDs are being resampled in ICA-AROMA?
Many thanks for your help!