Dana,
I believe you can achieve this by running recon-all on the subjects with
the -norandomness flag. Unless you are using a version of FreeSurfer that
is older than v3.0.4 - let me know if you are.
--
On Mon, 15 Jun 2009, Dana W. Moore wrote:
> Hi all,
>
> I have run the same image twice with recon-all and gotten different results
> for the cortical parcellation, with regions of the cortex differing an
> average of 2% in volume and the biggest difference being 11% (left bankssts).
> This is on a healthy, elderly brain. I'd like to try running images removing
> the random factor that apparently causes these differences. I found
> instructions on the internet to create an expert-options file to remove this
> random factor. I was wondering where this file should be saved. My problem
> is I am actually working remotely with parallel processing nodes, and I don't
> have permission to write to the freesurfer home directory. I was wondering,
> if I could use the whole path when I enter this command into recon-all, and
> then save it anywhere I like.
>
> Thanks,
> Dana
>
>
> Dana W. Moore, Ph.D.
> Neuropsychology Fellow
> Cornell Neuropsychology Service
> Weill Medical College of Cornell University
> New York Presbyterian Hospital
> Department of Neurology & Neuroscience
> 428 East 72nd Street, Suite 500
> New York, NY 10021
> Phone: 212-746-2441
> Fax: 212-746-5584
> Email: dwm2003@med.cornell.edu
>
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