External Email - Use Caution Hi AJ,
The longitudinal stream does not account for inter-scanner variability, but does reduce biases related to registering subsequent timepoints to the initial one. Perhaps longitudinal experts could confirm, but I would run the longitudinal stream, then account for scanner differences afterwards. -Paul On Sun, Jul 4, 2021 at 10:03 AM AJ <ajcns1...@gmail.com> wrote: > External Email - Use Caution > > Hi, > I am running Freesurfer on longitudinal datasets all obtained on 3T > scanners. Unfortunately, many of the MRIs were done on different > scanners, Phillips and GE. > Would longitudinal pipeline help reduced scanner variability or should I > process crossectionally each time point separately and normalize these time > points with eTIV? > > Many thanks > AJ > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://secure-web.cisco.com/1NUSHcL-6MfXxf9NKeaB2MQFcyMAjYRVBfgF-8Tqm-hpRL5d5rFVDM0oAwSVo2R_PM0v-aN9yg9Qpq0JOr0-nqTEmq6kRBC64psI91YWhciSlRKGFz8C9eb_SP2bMSXWx2qzVD8i_2jgrnHauIB9P0MYG8JXOT9DxKxnExZ4p4ijMxt0zEOCI0qIdzD08_dShnSuqZ8FsRu1oSjBRq8JqTpm87BpKS6ufpv-MvPdFLLHOI-ioniUaR7gwaCCE-XmjIzWWo77VdI1FbFTJW-jw0A/https%3A%2F%2Fmail.nmr.mgh.harvard.edu%2Fmailman%2Flistinfo%2Ffreesurfer
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