Hi all,

I ran into Chris M. at OHBM and he pointed out that when using the aCompCor regression strategy, the cosine regressors should be used too (this is not documented, we should change that)

Can anyone verify that the comparison below makes sense:

We are moving from bash scripts that implemented Thomas Yeo’s pipeline at MGH to fmriprep, and want to be able to compare traditional global signal regression to CompCor and/or ICA-AROMA:

For the aCompCor regression:

aCompCor00, aCompCor01, aCompCor02, aCompCor03, aCompCor04, aCompCor05, X, Y, Z, RotX, RotY, RotZ, (and we should also be adding in: Cosine00 Cosine01 Cosine02 Cosine03)?

For the standard regression:

CSF, WhiteMatter, GlobalSignal, X, Y, Z, RotX, RotY, RotZ

For ICA-AROMA:

What if anything, should be regressed out from that nii.gz file to be most similar to the above?

For consistency’s sake, we’ve removed the first four frame first, but could add them back in, then add some extra non-steady-state columns

Thanks!

-Alex