As my understanding, MNIa is the shifted version of MNI.
When I see my statistical results on the AFNI GUI, and I checked the location of peak voxel by using 'whereami' function.
From this, ROI name is given according to MNIa atlas not MNI atlas.
1) Why do we need MNIa instead of MNI atlas in the 'whereami' on the AFNI GUI?
2) If I use 'MNI_caez_ml_18+tlrc' for 3dROIstats to extract the average time series over ROI_01, this ROI_01 would be captured at the same region which defined from 'MNIa_caez_ml_18+tlrc' even though these two atlas does not have same center?