External Email - Use Caution        

Hello,

'timepoints' refers to the individual scan sessions that make up a longitudinal 
dataset for a subject.

i.e. If a subject was scanned 3 times, say in 2010, 2015, and 2020, this 
subject would have 3 timepoints. One from each year they were scanned.

Best,
Jackson
________________________________
From: freesurfer-boun...@nmr.mgh.harvard.edu 
<freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of Atwater, Emanuel R 
<emanuel.r.atwa...@uth.tmc.edu>
Sent: Thursday, July 27, 2023 6:15 PM
To: freesurfer@nmr.mgh.harvard.edu <freesurfer@nmr.mgh.harvard.edu>
Subject: [Freesurfer] (no subject)


        External Email - Use Caution

Hello FreeSurfer Team,



I recently messaged about running a longitudinal scan on a couple of images.



The response told me to utilize “timepoints”:

For base processing, specify each timepoint with -tp <> (not the nii file).

recon-all -base <templateid> -tp <tp1id> -tp <tp2id> ... -all



I’ve attempted to review the youtube videos and instructions made available 
online but am unsure what “timepoints” are. Can I have some clarification on 
what exactly a timepoint is, please.



FS version: freesurfer-linux-centos7_x86_64-7.2.0-20210720-aa8f76b

Recon-all.log: see attached



V/r,

Emanuel Atwater


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