Hi Lisa,

for a subject with N time points, you will have 2N+1 directories:

Stage1: N cross sectionally (independently) processed
Stage2: 1 base/template, representing average anatomy of this subject
Stage3: N longitudinally processed subject that use some joint information from the cross (stage1) and base (stage2), these are the ones you will use for your final measurements.

See
https://surfer.nmr.mgh.harvard.edu/fswiki/LongitudinalProcessing
for details (there are also links to
- Editing
- tutorial
- statistics
- citations

etc.

Cheers, Martin

On 11/20/2015 04:56 AM, Lisa Delalande wrote:

Hi,

I would like to know if, in doing a longitudinal study (i.e. 2 or 3 MRI each subjects), this is usual to have many file for one subject (see the picture, 5 file for one subject with two MRI : a0009_1 = MRI 1 and a0009_2 = MRI 2) ? Because in the future I will have around 100 subjects with 3 MRI each so I will have a lot of file to handle with ...

Thanks in advance !

Friendly

Lisa
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

-- 
Martin Reuter, PhD
Assistant Professor of Radiology, Harvard Medical School
Assistant Professor of Neurology, Harvard Medical School
A.A.Martinos Center for Biomedical Imaging
Massachusetts General Hospital
Research Affiliate, CSAIL, MIT
Phone: +1-617-724-5652
Web  : http://reuter.mit.edu