Dear Bruce/Allison,
Could you please try to give response to my question
which wm and gm volumes I shoud use, see my
today's submission below.
Ed
On 27 Oct 2010, at 14:41, freesurfer-requ...@nmr.mgh.harvard.edu wrote:
Dear Christian,
Thanks for your suggestion. I followed the instructions to derive the
GM and WM volumes. Here are the (rounded-off) results for one example:
mris_volume lh.pial: 532767
mris_volume rh.pial: 536127
mris_wm_volume lh: 251139
mris_wm_volume rh: 254730
Accordingly:
gm lh = 532767 - 251139 = 281628
gm rh = 536127 - 254730 = 281397
Left + right:
total = 1068894
wm = 505869
gm = 563025
------------
The aseg.stats file lists the following results:
cortical wm lh: 251139
cortical wm rh: 254730
total wm: 505869
cortical gm lh: 263888
cortical gm rh: 265231
total cortical gm: 529119
subcortical gm: 181270
total gm: 710389
--------------
For wm both results are equal but for gm they are not.
So now my question still exists: which wm and gm volumes should I
take?
Ed
On 26 Oct 2010, at 20:40, freesurfer-requ...@nmr.mgh.harvard.edu
wrote:
Dear Ed,
to my knowledge, "mris_wm_volume" is the best option to determine the
white matter volume.
See this wiki page for usage:
http://surfer.nmr.mgh.harvard.edu/fswiki/MorphometryStats
Best wishes,
Christian
---
Christian Scheel
Department of Psychiatry
University of Cologne
Am 26.10.2010 15:22, schrieb Ed Gronenschild:
Hi,
I post this once again because I didn't get any response.
In the v5.0.0 aseg.stats file I can find the following volumes:
- left/right cortical gray matter
- subcortical gray matter
- total cortical gray matter
- total gray matter volume
and
- left/right cortical white matter
- total cortical white matter
How can I derive the total white matter volume?
Ed
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