Hi David,
Thanks for your reply. I asked for this capability because I am trying
to perform a spherical registration. Many landmarks are defined as
starting and terminating at a certain distance from an anatomical
reference point. I thought that a tool, which allows the user to enter a
reference point coordinate in the surface and, after, displays every
node that is at a given geodesic distance from it, would be helpful
This capability is not essential for me. I was wondering if it was
already implemented in Caret.
Best regards,
Mateus
David Vanessen wrote:
Mateus,
First, it is important to clarify whether your request pertains to
nodes (as stated) or to foci. In Caret terminology, nodes refers
specifically to the points that make up a surface and have locations
specified within a coordinate file. Foci refers to stereotaxically
identified locations (typically fMRI activation centers) that are
specified within a foci file or foci projection file. I'm guessing
you are referring to foci, but let us know.
At present, I don't think that the capability you are asking about
exists for either nodes or foci. If you can let us know what you
will be using this for and whether this is a pressing need, it will
help us to prioritize the request. Also, if other Caret users would
like to see this functionality, let us know.
Best regards,
David
On Nov 29, 2006, at 11:28 AM, Donna Dierker wrote:
If you were talking about geodesic distance (i.e., running along the
contour of the fiducial surface -- not as the crow flies through the
CSF/WM), then you could use the Surface: ROI feature for this
purpose. (First operation Geodesic Distance, and then threshold the
resulting metric at the desired distance.)
I'm not aware of something like that for 3D distances, but there's a
Make Sphere feature in Window: Script Builder. Worst case, you
could generate a sphere around the enclosing voxel and map that ROI
volume to the surface.
On 11/29/2006 11:18 AM, Mateus Joffily wrote:
Hi,
In Caret5.5, is there a way of selecting a node and finding all (or
some) nodes that are at a given distance from it? I think I am
looking for something similar to what is described in section
2.17.2 (Foci Data Searches) of the 'Caret Tutorial – the Basics'.
But Section 2.17.2 regards only WebCaret. Does it exist something
similar to Caret5.5?
Thanks,
Mateus
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--
Donna L. Dierker
(Formerly Donna Hanlon; no change in marital status -- see http://
home.att.net/~donna.hanlon for details.)
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