:)
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, 2009 at 8:36 PM, Bruce Fischl <fischl@nmr.mgh.harvard.edu> wrote:
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 <fischl@nmr.mgh.harvard.edu>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 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
don't have anything that will do that (easy enough to do in matlab though).

cheers
Bruce


On Sat,
7 Nov 2009, Yigal Agam wrote:

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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