Dear FSL,
I am trying to determine a conversion (linear
translation) from fslview's coordinate system to
MNI152 coordinate space.
My experience is that fslview, along with other
viewers I have used, sets the origin (0,0,0) as
follows:
x = 0: leftmost location in the x direction (rightmost
radiologically),
y = 0: most posterior location,
z = 0: most inferior location.
In an attempt to associate a specific coordinate with
the nearest anatomical structure, either in
command-line programs or in websites I've found, it
appears that (0,0,0) is somehow near the center (or
perhaps THE center) of the brain itself.
It appears that there are two coordinate systems: a
voxel-based coordinate system and a so-called world
coordinate system, that latter having the MNI brain
centered at the origin.
1) Is there an FAQ or archived email discussion about
this?
2) If not, what are the offsets along each axis to
convert from one system to the other..?
3) Does FSL already have a command line tool that
automates this translation?
Many thanks and regards,
Robert Terwilliger
Laboratory of Neuro-Cognitive Development
University of Pittsburgh
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