the interior voxels are only included in the volume if they are one of
the following in the aseg.mgz:
case Left_Cerebral_Cortex:
case Right_Cerebral_Cortex:
case Left_Cerebral_White_Matter:
case Right_Cerebral_White_Matter:
case Left_WM_hypointensities:
case Right_WM_hypointensities:
cheers,
Bruce
On Tue, 15 Jul 2008, Marin
Richardson
wrote:
OK, so aparc.stats is better for cortical gray matter. I want to look at the
parcellated white matter volumes as well - is the only/best option to use the
wm volumes from wmparc.stats?
Also, when using mris_wm_volume to calculate total white matter, I saw the
result defined as the volume within the white matter surface minus non-WM
structures? Can you tell me which regions are and are not included?
Marin
Doug Greve <[EMAIL PROTECTED]> 7/15/2008 12:02 PM >>>
It is better to use the aparc as it is derived from surface
measurements, which have sub-voxel resolution. The wmparc.stats are
generated by counting 1mm^3 voxels.
doug
Marin Richardson wrote:
Hi all,
I noticed that the gray volumes for parcellated cortical regions in
wmparc.stats are different from those for the same region in aparc.stats (e.g.
ctx-lh-middletemporal = 8419 in wmparc.stats, middletemporal = 9466 in
lh.aparc.stats). Why are the values different and which one is a better
measure to use?
Thanks,
Marin
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