Re: [Freesurfer] Interscanner variability

2021-07-07 Thread AJ
External Email - Use Caution Thank you for your response. Yes, the key question is to adjust for interscan variability through either histogram matching or ComBat before or after longitudinal run. Will await to see what the longitudinal freesufer experts think. My best AJ On

Re: [Freesurfer] Interscanner variability

2021-07-07 Thread Paul Wighton
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,

[Freesurfer] Interscanner variability

2021-07-04 Thread AJ
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 crosse