Hi Jenifer
1. The divisions are equally spaced in terms of distance along the primary
eigendirection (pretty much the long axis) of the cc.
2. The 3 values after the name are the RGB that the label is displayed in
(the 0 at the end if an unused flag at the moment). They should be visibly
different I would think, but feel free to mess with them.
3. The lateral extent can be changed with the -T <thickness> parameter,
where <thickness> is the distance off the midline (so -T 1 would result in
the who CC being 3mm thick). The default is 2 so it's 5mm thick. The
aseg.stats values should be volume.
cheers,
Bruce
On Sun, 27 Jan 2008, Juranek, Jenifer wrote:
Hi,
I'm running FSv4.0.1 on a 64bit linux platform and had a few questions about
the new added feature wrt the corpus callosum segmentation added as early as
v4.0.0...details were not readily returned in Wiki searches...so please point
me in the correct direction?
1) The 5 separate regions of the CC...how are the boundaries determined? In
equal subdivisions (20%) from the genu through the splenium?
2) Although the LUT.txt contains entries for the CC subdivisions, I have been
unsuccessful with attempts to display either the aseg.auto_CCseg.mgz or
wmparc.mgz files in tkmedit such that the boundaries between subdivisions are
easy to visualize...do I need to modify the LUT.txt file with different entries
in the last 4 columns than those already present to make it more obvious?
EXAMPLE of current entries in LUT.txt...
251 CC_Posterior 0 0 64 0
252 CC_Mid_Posterior 0 0 112 0
253 CC_Central 0 0 160 0
254 CC_Mid_Anterior 0 0 208 0
255 CC_Anterior 0 0 255 0
3) The aseg.stats file contains data for each subdivision...do the values
represent area (mm2)? On the midsagittal slice?
Many Thanks for any info you can provide!
Jenifer
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