Hi Anna,

the linear mixed effects models can include subjects with a single time point and it would be a shame to drop that information. That is why we modified the longitudinal pipeline (use 5.3) to allow processing of subjects with a single time point. However, it is necessary that these images undergo the same processing steps as the rest of the data (to avoid bias). So you run it exactly as other subjects, with a cross sectional, -base and a -long step:

recon-all -all -s <tp1id> -i path_to_tp1_dcm
recon-all -base <templateid> -tp <tp1id> -all
recon-all -long <tp1id> <templateid> -all

Best, Martin

On 02/18/2014 04:58 AM, Anna Jonsson wrote:
Dear Freesurfer experts,

I want to know if possible when doing longitudinal stream to put subjects with only one time-point through the processing (eg base and long runs) in order to subsequently use with the Matlab lme tools? Or better is to leave them out and only do those with 2+ times?

Thank you

Kind Regards,

Anna


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Martin Reuter, Ph.D.
Assistant in Neuroscience - Massachusetts General Hospital
Instructor in Neurology   - Harvard Medical School
MGH / HMS / MIT

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