afni.nimh.nih.gov

Hi,

I have a confusion about the "-regress_censor_motion" in afni_proc.py.
In the help page, the default setting is:
-regress_censor_motion 0.3 \
Does it mean that this line "sets a threshold for motion of roughly 3mm or 3 degrees of rotation (based on euclidean norm)"?

What is the unit of the threshold?
Centimeter or micrometer ?

Thanks a lot!

-lzy