Dear Iven,
Are you just talking about calculating the ICV for the standard template?
If you just want the ICV to normalise values by then this actually doesn't
matter, as it will be a constant across all subjects in the normalisation.
So just getting a rough estimate, like using the non-zero voxels in the
MNI152_T1_2mm_strucseg would do (it is 2268144 mm^3 by the way).
If you did need a more accurate value then you could make a mask
yourself manually (say starting with the one above) in FSLView. However,
as I said before, if it is just for normalization of volumes then it will not
matter for any statistics.
All the best,
Mark
On 12 Jul 2011, at 16:17, Iven Fellhauer wrote:
> Dear Mark,
>
> I analyze T1 MRIs of MCI and AD patients, so thanks for your hint and help. But I have some questions about the alternative method. The standard space template is the MNI152 T1 template? I run sienax with the same options as mentioned in my last email or is there another tool to calculate the ICV? If not, I can simply sum up the GM, WM and vCSF volumes to get the ICV?
>
> Best regards,
>
> Iven
>
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