Thank you Donna. I also have another question:
Is there any way to highlight the path of smaller distance, so as to observe it in the brain surface? Ana Le 29/01/2013 19:00, [email protected] a écrit : > Send caret-users mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://brainvis.wustl.edu/mailman/listinfo/caret-users > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of caret-users digest..." > > > Today's Topics: > > 1. Surface distances (Ana Gomes) > 2. Re: Surface distances (Donna Dierker) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 29 Jan 2013 11:23:39 +0100 > From: Ana Gomes <[email protected]> > Subject: [caret-users] Surface distances > To: [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > Dear all, > > > My question is about how caret calculates the surface distance between > two centers of gravity. Does it calculate the minimum distance between > the centers (passing through the minimum #nodes) or are there some > default constraints? > > How can I produce I file that constraints the way we calculate the > distances, for example calculate the distances avoiding the corpus callosum? > > Thank you, > > > Ana > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://brainvis.wustl.edu/pipermail/caret-users/attachments/20130129/16c1c3f7/attachment-0001.html > > ------------------------------ > > Message: 2 > Date: Tue, 29 Jan 2013 09:07:01 -0600 > From: Donna Dierker <[email protected]> > Subject: Re: [caret-users] Surface distances > To: "Caret, SureFit, and SuMS software users" > <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset=iso-8859-1 > > Hi Ana, > > I'm not sure Caret (caret5, at least) does what you want. There is this: > > caret_command -surface-geodesic > <surface-coord> > <surface-topo> > <output-metric> > <smoothed> > [-node node-number] > > Generate the geodesic distance from all nodes to all other nodes > unless a node number is specified in which case the distances are > output for the specified node to all nodes. > Uses dijkstra's algorithm with reuse of information from previous > root nodes. If smoothed is 'true', it traces paths over adjacent > triangles in order to generate distances for some 2hop neighbors. > This causes the contours of equal distance to be closer to circular, > and also makes the distances more consistent for a mesh which has > been streched nonuniformly. It is almost as fast as unsmoothed. > > surface-coord the surface coord file > > surface-topo the surface topo file > > output-metric output metric file for geodesic distance > > You could generate a topology file that excluded the corpus callosum, if you > have a label/parcellation/paint file that identifies the CC. You could use > the Surface: ROI menu or caret_command to successively exclude any vertices > to be avoided from your topo file. > > But when you click on the surface in the GUI ("ID nodes"), you get the > Euclidean distance between the points -- not the geodesic distance. > > Donna > > > On Jan 29, 2013, at 4:23 AM, Ana Gomes <[email protected]> > wrote: > >> Dear all, >> >> >> My question is about how caret calculates the surface distance between two >> centers of gravity. Does it calculate the minimum distance between the >> centers (passing through the minimum #nodes) or are there some default >> constraints? >> >> How can I produce I file that constraints the way we calculate the >> distances, for example calculate the distances avoiding the corpus callosum? >> >> >> Thank you, >> >> >> Ana >> >> _______________________________________________ >> caret-users mailing list >> [email protected] >> http://brainvis.wustl.edu/mailman/listinfo/caret-users > > > > ------------------------------ > > _______________________________________________ > caret-users mailing list > [email protected] > http://brainvis.wustl.edu/mailman/listinfo/caret-users > > > End of caret-users Digest, Vol 112, Issue 7 > ******************************************* _______________________________________________ caret-users mailing list [email protected] http://brainvis.wustl.edu/mailman/listinfo/caret-users
