Nuissance Regressor Estimate

Hi RfMRI-team, I am trying to replicate results of a previous published study before moving ahead. We are having trouble replicating so we need to know specifics about how DPARSF Version 3.2 performs the nuissance regression (motion, CSF and WM). This is the how the team whose results we are trying to replicate did their pre-processing: "In our pipeline, we use aCompCor nuisance regressors estimated within white matter (mask defined in FreeSurfer) and CSF (from SPM) masks, in addition to the 6 realignment parameters and their derivatives." (The aCompCor approach produces PCA components which estimate noise in WM+CSF regions, which is not exactly the same as taking the mean time course of a noise region. The masks for white matter and CSF could also be different between our two pipelines.) *Does DPARSF version 3.2 perform the regression in a way similar to that described above or does it regress out the mean or something different? * Thank you for your time. Stephanie