The longitudinal pipeline will not overcome (contrast) differences due to scanner differences. If you register the scans to eachother you will see that there are slight differences in WM/GM contrast. Probably better to use the scans from the same scanner and not use the third.
Van: freesurfer-boun...@nmr.mgh.harvard.edu [mailto:freesurfer-boun...@nmr.mgh.harvard.edu] Namens Michelle VanTieghem Verzonden: zondag 17 september 2017 19:18 Aan: Freesurfer support list Onderwerp: Re: [Freesurfer] longitudinal freesurfer- different scanners Hi all, I just wanted to follow up on my question: Would it be ok to use the longitudinal pipeline for scans that were acquired on different scanners (e.g time 1 and time 2 on the same scanner, time 3 on different scanner)? Would the longitudinal pipeline help to account for different scanners, since it creates the average base image for all 3 time points? or is this not recommended to use different scanners in longitudinal pipeline? Thanks! - M On Mon, Sep 4, 2017 at 5:27 PM, Michelle VanTieghem <michelle.vantieg...@gmail.com> wrote: Hello, Would it be ok to use the longitudinal pipeline for scans that were acquired on different scanners (e.g time 1 and time 2 on the same scanner, time 3 on different scanner)? Would the longitudinal pipeline help to account for different scanners, since it creates the average base image for all 3 time points? or is this not recommended? Thank you, Michelle -- Michelle VanTieghem PhD student in Psychology Developmental Affective Neuroscience Lab Columbia University mrv2...@columbia.edu -- Michelle VanTieghem PhD student in Psychology Developmental Affective Neuroscience Lab Columbia University mrv2...@columbia.edu
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