Hi Rudolph,
and thanks for the offer. I think I have to appologize to the author of the
thread for jumping into his discussion. I just felt that the topic of my
question was so close to his that I didn't resist.
In fact in my analysis, label dilation as implemented in tksurfer and
suggested by
Hi Martin --
There is an app in the development tree, 'mris_pmake' that can be used
to generate fixed-radius regions about arbitrary vertices. It's
scriptable, so you can feed it a list of vertex indices to build
circular ROIs about.
It should be available in the 5.0 release of FreeSurfer, but
Hi Martin,
it will dilate by one neighbor in the mess, regardless of distance. The
neighbors start out about 1mm apart, but there is some variation (which
is why it won't end up being exactly circular).
cheers,
Bruce
On Sat, 7 Nov 2009, Martin
Kavec wrote:
> :)
> thanks. In volume images dila
:)
thanks. In volume images dilation is usually by 1 voxel, but as far as I
understand, label is a surface represented by a mesh where a distance
between vertices does not need to be the same. So if I want to dilate the
label by 10 mm do I click "dilate label" 10x.
Thanks,
Martin
On Sat, Nov 7,
once every time you click "dilate label"
On Sat, 7 Nov 2009, Martin Kavec
wrote:
> Hi Bruce,
>
> if I dilate an arbitrarily shaped label in tksurfer, how much is it actually
> dilated?
>
> Thanks,
> Martin
>
> On Sat, Nov 7, 2009 at 8:18 PM, Bruce Fischl
> wrote:
>
>> Hi Yigal,
>>
>> yes, you ca
Hi Bruce,
if I dilate an arbitrarily shaped label in tksurfer, how much is it actually
dilated?
Thanks,
Martin
On Sat, Nov 7, 2009 at 8:18 PM, Bruce Fischl wrote:
> Hi Yigal,
>
> yes, you can select the vertex, make a label out of it, then dilate it
> however many times you want. This will be a
Hi Yigal,
yes, you can select the vertex, make a label out of it, then dilate it
however many times you want. This will be approximately spherical.
Alternatively you could write some code to use the ?h.sphere surface to
compute geodesic distances (great circles) to do it more exactly, but we
d
Hi,
In surface-based analysis, is it possible to create an ROI label that is
a circle of a certain radius around a given vertex?
Thanks,
Yigal
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