There is not something that will plug-and-play for this. But you can do something like cd subject/surf fscalc lh.thickness div ETIV -o lh.thickness.etiv.mgz where ETIV is from the aseg.stats file
Then specify --meas thickness.etiv.mgz when running mris_preproc
On 2/14/19 12:50 PM, Williamson, Brady wrote:
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Hi,
I am running an analysis in a group of pediatric subjects (4-6 years old) and want to correct cortical thickness values by ICV before running the statistical model, since we have limited degrees of freedom. While I know this is not recommended for adults, I believe it is routinely done in pediatrics but I cannot find the implementation in freesurfer. Is there a straightforward way to normalize cortical thickness by ICV before running the glm?
Thanks,
Brady Williamson
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