Hi Robby,
depends on what you are trying to achieve.
The first stats model we implemented was the 2-stage model (with a linear fit inside each subject and then a cross sectional comparison of the atrophy rates, ie. slopes of the fit). For the first step the surface data (within-subject) is already in a common space (although not smoothed yet) and no qcache is needed and for the second step it cannot be done without first doing the first step.
Now we also have tools for linear mixed effects modelling. For that we need all data (all time points from all subjects) in the fsaverage space. Try using the -qcache command on the longitudinal directories (e.g. together with the --long flag etc). That should do the trick.
Best, Martin
On 11/04/2014 07:27 AM, Robby De Pauw wrote:
Dear FS-experts
Is there any command that I can use for caching my preprocessed data in the recon-all longitudinal stream, since this is possible through adding the -qcache option in the cross-sectional pipeline. Or maybe this is already automatically done without adding any option to the command?
Thank you
Greeting
Robby
Robby De Pauw, drs. *Ghent University* Department of Physiotherapy and Rehabilitation Sciences 3B3 De Pintelaan 185 B-9000 Ghent
Robby.DePauw@Ugent.be mailto:Robby.DePauw@Ugent.be
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