Re: [caret-users] distance from a node

2006-11-30 Thread Mateus Joffily
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

Re: [caret-users] distance from a node

2006-11-30 Thread Donna Dierker
Oh! That's ridiculously easy. Those reference distances are in mm on the inflated (except for the staring sylvian, which is relative to the flat surface). You click one node on, say, the occipital pole; then you click a border point along the calcarine you guesstimate is about 24mm from the

Re: [caret-users] distance from a node

2006-11-30 Thread Mateus Joffily
Hi Donna, That's exactly what I did (although, there are some details in your example that I didn't understand well, see below). But, instead of keep going forth and back selecting nodes and subtracting their coordinates values (I had to do it quite often), I was wondering if there was not an

Re: [caret-users] distance from a node

2006-11-30 Thread Mateus Joffily
I already started having fun with Caret! ;-) Thank you very much Donna Dierker wrote: Come to think of it, I would benefit from that utility, too.;-) Even better would be an accurate, automated border drawing utility. Kidding aside, we recognize this is a highly desirable enhancement, but

Re: [caret-users] distance from a node

2006-11-29 Thread Donna Dierker
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