I see. I don't think we generate that by default. If you have a bunch of subjects I guess you could great a single vertex label at the frontal pole and another at occipital pole on fsaverage, then map each of them to each subjects and compute the distance between them. That will be a rough estimate. Or you could transform the brainmask.mgz to tal coords and see what the first and last a/p coords are. Neither will be perfect

On Wed, 16 Mar 2016, Heather Acuff wrote:

Hi Bruce,
I'm asking for the length of the entire hemisphere.

Thank you!
Heather

On Wed, Mar 16, 2016 at 11:19 AM, Bruce Fischl <fis...@nmr.mgh.harvard.edu>
wrote:
      Hi Heather

      the anterior/posterior length of each tract you mean? Or the
      length of the entire hemi?
      Bruce
      On Wed, 16 Mar 2016, Heather Acuff wrote:

            Good morning,

            I apologize if this email was sent out twice.  I
            would like to
            use anterior to posterior length as a covariate in
            my DTI analysis.  Is
            there an easy way to obtain this information for
            each subject?

            Thank you,
            Heather


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