I am preprocessing some resting state date with afni_proc.py. I understand the errts image is basically the image file after the regression analysis. What’s putting me off a little is that there are non-zero voxel values outside the brain mask. All of the other prior outputs seem fine. I am not sure if this is standard (need to apply a mask later to limit non-zero voxel areas to the brain) or there is something wrong in the analysis. I am attaching an image (slice) of the errts file alone and overlayed with the brain mask.
Thank you very much and I appreciate your help.
e.bmp (10.3 KB)
em.bmp (10.3 KB)