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It is not corrected for eTIV. You can compute eTIV as you suggest, ie,
running autorecon1 then running mri_segstats --xfm2etiv
subject/mri/transforms/talairach.xfm etiv.dat
On 5/9/2023 8:01 AM, Asmin Alam wrote:
External Email - Use Cautio
Hi Tamara,
yes, it is in the aseg stats . You can extract that information for all
subjects using asegstats2table
Best, Martin
Am 23.11.2017 um 20:43 schrieb Tamara Tavares:
Hello,
Just a quick question regarding the computed intracranial volume. I
have ran Freesurfer version 5.1 and I have
yes, that is correct
On 11/23/17 2:43 PM, Tamara Tavares wrote:
Hello,
Just a quick question regarding the computed intracranial volume. I
have ran Freesurfer version 5.1 and I have been using the intracranial
volume from the aseg.stats file to correct for head size. I just want
to ensure t
Not only this value, but you can run asegstats2table and specify only
one segmentation. It will give you that segmentation as well as various
other whole brain measures. You run this on multiple subjects to give
you a table of values.
doug
On 2/5/13 7:51 PM, Bruce Fischl wrote:
> Hi Linn
>
> I
Hi Linn
I think the answer is "yes", but Doug or Nick can hopefully give you
details
Bruce
On Tue, 5 Feb 2013, Linn Mittlestein wrote:
> Dear Bruce,
> Thank you for your kind reply. I was however wondering whether there is a
> specific command used to extract this value from all stats files from
Dear Bruce,
Thank you for your kind reply. I was however wondering whether there is a
specific command used to extract this value from all stats files from
multiple subjects
Kind regards
On Tue, Feb 5, 2013 at 3:06 PM, Bruce Fischl wrote:
> Hi Linn
>
> the ICV is estimated as part of the recon
Hi Linn
the ICV is estimated as part of the recon-all process and ends up in one
of the stats files. Is that good enough?
Bruce
On Tue, 5 Feb 2013, Linn
Mittlestein wrote:
> Hi,
>
> Is there a command that can be used just to extract just the intracranial
> volume of all participants?
>
> Ma
On 09/25/2012 03:09 PM, Bruce Fischl wrote:
> check the accuracy of the talairach xform
Hi
I am using Freesurfer version 5.1 with all bug fixes. I have snapshots
off all talairach xforms made through qa_tools. I have seen on a few
subjects that the talirach transformation went okay. The pial sur
Hi Knut
can you check the accuracy of the talairach xform? And what version are
you using?
Bruce
On Tue, 25 Sep 2012, Knut J Bjuland wrote:
> Hi,
> I have calculated relative volume by dividing each volume by the
> intracranial volume and multiply it with 100. When I add the relative
> volume of
Hi Nikhil,
this indicates a problem with the talairach.xfm computation. The ICV is
computed from the Talairach transform (which basically determines how
much stretching is needed to get this image to the talairach space where
the ICV is approx known). There is no mask.
See
http://www.freesurfer.
Thanks Doug and Bruce!
On Tue, Aug 16, 2011 at 10:58 AM, Douglas N Greve wrote:
> Supratentorial is GM+WM+Ventricles+**WMHypointensities+Thalamus+**
> VentralDC
>
>
> Bruce Fischl wrote:
>
>> Hi Alan
>>
>> the ICV we compute is from the det of the talairach xform using Randy
>> Buckner's method
Supratentorial is GM+WM+Ventricles+WMHypointensities+Thalamus+VentralDC
Bruce Fischl wrote:
> Hi Alan
>
> the ICV we compute is from the det of the talairach xform using Randy
> Buckner's method (see his paper on this topic). It includes everything
> inside the skull implicitly.
>
> I'll leave
btw, the intracranial volume is an estimate based on the talairach
transform (it is not computed by counting voxels in the cranium).
doug
Bruce Fischl wrote:
> it includes all of those
>
> cheers
> Bruce
> On Tue, 16 Aug 2011, carolina.mr wrote:
>
>
>> Hi, all,
>>
>> Does anybody know what the
Hi Alan
the ICV we compute is from the det of the talairach xform using Randy
Buckner's method (see his paper on this topic). It includes everything
inside the skull implicitly.
I'll leave Supratentorial for someone else, as I don't remember.
cheers
Bruce
On Tue, 16 Aug
2011, Alan Francis
Hi Bruce:
Following up on Carolina's question, if I understand correctly,
Is ICV = GM+WM+Ventricular Volume ?
and
Supratentorial Volume = GM+WM ?
thanks,
Alan
On Tue, Aug 16, 2011 at 10:03 AM, Bruce Fischl
wrote:
> it includes all of those
>
> cheers
> Bruce
> On Tue, 16 Aug 2011, carolina
it includes all of those
cheers
Bruce
On Tue, 16 Aug 2011, carolina.mr wrote:
> Hi, all,
>
> Does anybody know what the intracranial volume and supratentorial volume
> include? Does it include only the parenquima volume (white matter / gray
> matter volumes) or it
> includes the ventricules an
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