The problem: I have some areas in MEG I would like to track as "ROI"s. To do this, I need labels for those areas which are active clusters. In MEG, I can convert an activity map into a .w file, which is the "paint" format used for overlays in tksurfer.
So the new problem: I have a .w file, which contains clusters of areas which are above a threshold value. I want label files for each cluster.
mri_surfcluster, which seems similar to what I need, does not output labels, or anything like it, so far as I can tell.
Does a method exist, or should I invent one?
(an example of this would be: do a vision experiment in MEG. primary visual areas will be active, so a blob shows up over there in MEG. If I want to see the behavior of that blob vs. time, I need a label. I am hoping there exists a way to send the image of the blob (or blobs) from MEG to surfer as .w files, and then figure out automatically where clusters (blobs) appear, and then create a label file for each one)
Daniel Goldenholz ----------------------------------------------------- Cell: 617-935-9421 http://people.bu.edu/danielg/
Hi Daniel,
you can do it manually in tksurfer - click on a point in the roi and create a label filling above the statistical threshold. Or do you want a label for every active region? You could do that in matlab I guess, or maybe Doug has something.
cheers, Bruce
On Thu, 8 Jul 2004, Daniel Goldenholz wrote:
The problem: I have some areas in MEG I would like to track as "ROI"s. To do this, I need labels for those areas which are active clusters. In MEG, I can convert an activity map into a .w file, which is the "paint" format used for overlays in tksurfer.
So the new problem: I have a .w file, which contains clusters of areas which are above a threshold value. I want label files for each cluster.
mri_surfcluster, which seems similar to what I need, does not output labels, or anything like it, so far as I can tell.
Does a method exist, or should I invent one?
(an example of this would be: do a vision experiment in MEG. primary visual areas will be active, so a blob shows up over there in MEG. If I want to see the behavior of that blob vs. time, I need a label. I am hoping there exists a way to send the image of the blob (or blobs) from MEG to surfer as .w files, and then figure out automatically where clusters (blobs) appear, and then create a label file for each one)
Daniel Goldenholz
Cell: 617-935-9421 http://people.bu.edu/danielg/
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Bruce Fischl -
Daniel Goldenholz