afni.nimh.nih.gov

Dear AFNI,

The default order for afni_proc is to blur before masking. Is there a reason this is preferred to masking before blurring? Is there any concern that blurring before masking could introduce "non-brain" voxels on the periphery into the blurred data? Also, if you are using tissue regressors would that make a difference in the order you use?

Best,
Jen