Hi All,
We have contiguous ROIs in cvs template (volume) space. We need to move this to each individual subject's surface. What's the best way of doing this? We tried going from template volume to individual volume to individual surface, but these rois were not all contiguous on the surface -- in some cases they were split nearly in half (most likely because they were placed on either side of a sulcus). We could try to correct for this problem in each individual, but that would be very labor-intensive and pretty subjective across individuals.
We're thinking that it would be better to go from template volume to template surface and then from template surface to individual surface -- this way we can make all of our corrections on the template surface, which would make ad hoc corrections not different across subjects. But we're not sure what the best way to do this is as the cvs transform that allows us to get back to subject-specific native space is a volume transform:
1. Do people think that going to template surface rather than individual volume is the better intermediate step?
2. If yes, do you think it's best to move to the CVS surface and then use spherical surface alignment transform to move from the template surface to each individual surface - or is there a better way to do this? Any pointers on how to do this with the smallest number of transformations and/or steps that require morphing or interpolation would be greatly appreciated.
sorry for the long email, and thanks in advance!
-kami
--------------------------------------------------------------- Kami Koldewyn, PhD. McGovern Institute for Brain Research MIT, Building 46 Room 4141 (Kanwisher Lab) Cambridge, MA 02139 kamik@mit.edu