Hi Eleonora,
the easiest way to do this is to create a label of the electrodes, then use mri_label2label to map them to the nearest pial vertices. This ability to map volume labels to nearest surface vertices is broken in the current version. I've fixed this and put a new version here:
ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/mri_label2label
Run it with --help and use Example 4. doug
On 04/02/2013 08:19 AM, Eleonora Maggioni wrote:
Hi Freesurfer experts, I am new to FreeSurfer and I have a question. I have markers of EEG electrodes on the T1 image of a subject and I want to project them from the scalp to his pial surface (that I reconstructed using the standard procedure). To do so, I manually selected the central point of each marker in tkmedit and I defined a control point. Then I red that control point with tksurfer on the corresponding pial surface. This should be the projection to the pial surface: is this procedure correct? If yes, in which coordinate system is the projection made? Thank you in advance, Kind regards,
-- Eleonora Maggioni
BioEngineering PhD student Politecnico di Milano Istituto E.Medea, Bosisio Parini (LC)
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