¥ AFNI formatted datasets are stored in 2
files
H The .HEAD
file holds all the auxiliary information
H The .BRIK
file holds all the numbers in all the sub-bricks
¥ Datasets can be in one of 3 coordinate
systems (AKA views)
H Original data or +orig view: from the scanner
H AC-PC aligned or +acpc view:
² Dataset rotated so that the anterior
commissure and posterior commissure are horizontal, the AC is at (x,y,z)=(0,0,0),
and the hemispheric fissure is vertical
H Talairach or +tlrc
view:
² Dataset has been rescaled to have its 12
sub-regions conform to the Talairach-Tournoux atlas
² Talairach
or Stererotaxic coordinates
² Not quite the same as MNI coordinates,
but close