¥ Datasets are stored in directories, also
called sessions
H All the datasets in the same session, in
the same view, are presumed to be aligned in xyz-coordinates
o Voxels with same value of (x,y,z)
correspond to same brain location
H Can overlay (in color) any one dataset
on top of any other one dataset (in grayscale) from same session
o Even if voxel sizes and orientations differ
H Typical AFNI contents of a session
directory are all data derived from a single scanning session for one
subject
o Anatomical reference (T1-weighted SPGR or MP-RAGE
volume)
o 10-20 3D+time datasets from FMRI EPI functional runs
o Statistical datasets computed from 3D+time datasets, showing activation (you hope and pray)
o Datasets transformed from +orig to +tlrc coordinates, for
comparison and conglomeration with datasets from other subjects