aCompCor only for white matter and not for CSF?

1

Dear all

In the confounds.tsv file of my data is a mean white matter regressor and 5 aCompCor regressors. Should in this file also be a regressor for CSF and its principal components or did this work as intended?

Thank you for the nice software and help.

Best wishes,
Silvano

2

aCompCor combines signal from from both white matter and CSF. However, if ventricles are too small to accurately extract signal from CSF only white matter ROIs will be used.

Because we cannot reliably extract CSF signals (in cases of people with small ventricles) we did not include a column with mean CSF signal in the participants.tsv file.

3

Allright. I understand. Thanks for the information.