afni.nimh.nih.gov

Hello Paul,

yes, this is exactly what I am trying to do (the "center of mass" part was also part of my process ).

I am working here with PET FDG dataset on rats, that I believe are in sphinx position (that would make a lot of sense).
However, I am not sure I understand the purpose of the command

3dresample -orient RAI -input DSET_01 -prefix DSET_02

When I apply it (as advised), and then

3dcopy DSET_02 DSET_03
3drefit -orient LIP DSET_03

it seems that the good orientation for 3drefit is: LIP and not LSP anymore.
In this case, L and Right are not changed.

This is where it gets tricky for me:

I don't understand the purpose of:

3dresample -orient RAI -input DSET_01 -prefix DSET_02

and so, why does applying it, change I to S in 3drefit when compared to my original dataset? and so LR...

Are there any issues applying directly the command 3drefit as I did previously?
(

3drefit -orient LSP -deoblique

)
thank you!