By default, just the interior, though it is possible to get measures
from the exterior
doug
On 3/7/14 1:09 AM, 沈庄明 wrote:
Hi Doug,
Sorry for forgetting to post to the list. The figure
attached to this email could illustrate my questions. The blue
region in the figure is a cortical parcellation (i.e.
precentral) obtained by FreeSurfer. As I understand, the
cortical parcellation has its own thickness (maybe 2~3mm) in
actually, therefore, this cortical parcellation has interior
surface (red line in the figure) and exterior surface (green
line in the figure). The interior surface separates the white
matter and the cortical parcellation, while the exterior surface
separates the cortical parcellation and the skull. What I want
to know is whether both the exterior surface and the interior
surface are computed when FreeSurfer calculates the surface
area.
Thanks!
Zhuangming Shen
-----原始邮件-----
发件人: "Douglas Greve" <gr...@nmr.mgh.harvard.edu>
发送时间: 2014年3月6日 星期四
收件人: "沈庄明" <zhms...@ion.ac.cn>, "free surfer"
<freesurfer@nmr.mgh.harvard.edu>
抄送:
主题: Re: [Freesurfer] Surface area in aparc stats
Hi Zhuangming, please remember to post to the list. Thanks! I
don't understand your question. What do you mean by the
exterior, anterior, posterior, etc, surfaces?
On 3/5/14 11:56 PM, 沈庄明 wrote:
Hi Doug,
Thank you for your prompting response. Do you mean
the computation only calculate exterior surface of the
cortical region ? The other five surface (i.e. anterior,
posterior, left, right, interior) are excluded ?
Thanks!
Zhuangming
-----原始邮件-----
发件人: "Douglas Greve" <gr...@nmr.mgh.harvard.edu>
发送时间: 2014年3月6日 星期四
收件人: freesurfer@nmr.mgh.harvard.edu
抄送:
主题: Re: [Freesurfer] Surface area in aparc stats
By default, the surface area is computed from the white
surface (ie, boundary between WM and GM). It is possible
to compute it from the pial surface (ie, boundary
between GM and background)
doug
On 3/5/14 9:14 PM, 沈庄明
wrote:
Hi all,
I need to know how is the SurfArea in
?h.aparc.stats calculated by FreeSurfer? Since each
cortical parcellation has its own thickness in 3D
space, does the surface area computation consider
both the exterior surface (i.e. the surface
separating the gray matter and the background) and
the interior surface (i.e. the surface separating
the gray matter and the white matter)?
Thanks!
Zhuangming Shen
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