¥ 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