Re: [Freesurfer] using two vs one scan(s) for optimal surface reconstruction

2013-07-15 Thread Chris Watson
I only have anecdotal evidence on this. (using version 5.1) I found that if both scans had "a little" motion, then using both improved reconstruction. If one scan was pretty bad, and the other was pretty good, then using the pretty good one on its own was better than using both. If both were pre

Re: [Freesurfer] using two vs one scan(s) for optimal surface reconstruction

2013-07-15 Thread Douglas N Greve
Hi Marie, I have not seen a publication on it. I've played around with it a bit and could not convince myself that there was a huge win in using 2, but it also depends a bit on your acquisition. If you have a lot of acceleration or really small voxels, then maybe it makes a bigger difference. A

[Freesurfer] using two vs one scan(s) for optimal surface reconstruction

2013-07-15 Thread Marie Schaer
Hi all, Small question related to the number of structural runs required for optimal results: I was wondering whether someone tested the assumption that using two scans rather than one improves the segmentation process and the cortical surface reconstruction / thickness estimation? I've not be