Dear all,

Apologies for this simple question.  I have tried to search the forum but I can't quite find a question that addresses my very basic lack of understanding of something.

I want to use Conn to run CompCor and then move to SPM for my first level analyses.  When I run the denoising step on a few sample functional runs, I have folders called "data" and "results".  "data" has files that are prepended "COND", "COV", "DATA", and "ROI" and one file called REX.mat.  It looks like the information from running ART to get outliers is in the COV files, but I have no idea where information about the CompCor filtration is stored, or what form it takes -- is it a resliced image?  A modification to the headers of my preprocessed image?  Some mat file somewhere? So I don't know how to use the filtered image in my preprocessing.

Also, a related question: if the CompCor filtration *is* an edit to a header file, and I was getting the warning message "no unsmoothed volume found; using original functional volume instead" does that mean that the volumes that are having their header changed are my original functional volumes?  I originally preprocessed my data using DARTEL and it smoothes and normalizes in one step.  

Thanks very much, and thanks in advance for your help.

 Best, 
Katie