Hello FreeSurfers,
My lab has been using the longitudinal processing stream for our data set and seem to be getting some potentially troublesome results. The attached images present a snap shot of the issues we are encountering.
As you can see in the left image, there seems to be some kind of shifting going on. However, when you view each individual T1 with their corresponding boundary maps they look spot on. My question is whether or not this will have any major implication when we are trying to do a longitudinal analysis of cortical thickness?
The more troublesome issue which is shown on the right is an overall "messiness" that seems to occur in some scans. When looking back at the template and the original FreeSurfer images there doesn't appear to be any issue. It's only when the longitudinal image is constructed that there seems to be some exaggerated blur as well as some over inclusions of dura (this isn't shown in the image but has happened in a handful of our subjects).
Has anyone else experienced these kinds of issues? Only a quarter of our subjects that look as good "quality wise" as the examples posted on your wiki.
Thanks,
Seth Hutton ********************************************************** Electronic Mail is not secure, may not be read every day, and should not be used for urgent or sensitive issues
