unWarpEPI.py

AFNI Message Board
1

Hello everyone
I would like to use unWarpEPI.py to perform correction with opposite polarity data (blip-down). I was wondering why in the help of afni_proc.py it is recommended to use this program after tshift, and also where correction with retroicor should be placed in this context, whether before or after unwarping.

2

The steps are implemented directly in afnI_proc.py, it does not
use unWarpEPI.py. To have AP.py do the unwarping, pass the
forward and reverse direction datasets via:

-blip_reverse_dset REVERSE+orig
-blip_forward_dste FORWARD+orig

The FORWARD dastaset should match the direction of the
main EPI data, used in the analysis.

  • rick