Hi Oliver,
you might check with Mike Chee (ccd) who has some tools for editing of
the mesh. Alternatively you could draw in some white matter (even if you
can't see it) to get the pial surface a closer initialization.
cheers,
Bruce
On Sat, 16 May 2009, Olivier Piguet wrote:
Thanks for the in
Thanks for the info. In severe cases of semantic dementia, you will
see overall atrophy where the anterior temporal pole becomes almost
non existent (combination of neuronal loss and white matter loss),
probably also contributing to reduced white/grey differentiation.
Is there a way to manu
thanks Mike. Was it the same situation, where there is no nearby white
matter? I guess I don't really understand the anatomy. Is there really a
place where you have 10mm of gray matter with no underlying white matter?
Or is it unmeylinated white matter that we just can't see?
On
Fri, 15 May 2
As an aside, in a Alzheimer/ elderly cohort of ~250, we had 12 subjects
that we had to exclude for what sounds like a very similar reason -- we
just couldn't get the pial surface in the anterior temporal lobe to
properly encapsulate the gray matter.
-Mike H.
On Fri, 2009-05-15 at 12:24 +1000, Ol
That is correct. This is case of semantic dementia where left anterior
temporal region is markedly atrophic.
Olivier
On 15/05/2009, at 9:15, Bruce Fischl wrote:
so there's 10mm or so of gray matter with no underlying wm? I didn't
think that was ever the case. What pathology is this in? And y
so there's 10mm or so of gray matter with no underlying wm? I didn't
think that was ever the case. What pathology is this in? And you're sure
it's cortex, not amygdala? Jean: any thoughts?
On Fri, 15 May
2009, Olivier Piguet wrote:
Hi Bruce,
In the coronal plane, slice 152 is the last slice
Hi Bruce,
In the coronal plane, slice 152 is the last slice where white matter
is clearly visible. Then, slices 153-158, only grey matter is
recognised but not all of it, and slices 159-164, grey matter is not
recognised at all.
I added control points on slice 151-153 in the hope that it w
Hi Oliver,
how far away is the nearest white matter?
Bruce
On Fri, 15 May 2009, Olivier
Piguet
wrote:
Hi there,
I haven't received a reply to my question below.
Just to clarify, I ran autorecon1 and autorecon2 on this subject. When
examining the surfaces in tkmedit, the left temporal pole
Hi there,
I haven't received a reply to my question below.
Just to clarify, I ran autorecon1 and autorecon2 on this subject. When
examining the surfaces in tkmedit, the left temporal pole is not
included in the pial surface. Is there a way to force freesurfer to
recognise this as valid brai
Hi there,
I've run autorecon2 on a subject who has significant unilateral
atrophy in the anterior temporal region. In the last few slices
anteriorly, the pial surface does not include what is clearly
atrophied cortical tissue without underlying white matter. What is the
method to correct f
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