Along the same vein, I found this page on the freesurfer site: http://surfer.nmr.mgh.harvard.edu/fswiki/QATools but it doesn't seem to link to any actual tools? have these been discontinued?

-Alex ~)-------------

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On Sep 4, 2009, at 4:03 AM, sima chalavi wrote:

Dear Freesurfer experts,

We performed 6 different (pilot) structural scans from the same subject and analyzed the data using Freesurfer in order to find the best scan to be used in our real experiment.

We have checked the Freesurfer output visually and there do not seem to be any problem as described in the trouble shooting manual. So all 6 scans manage to get through the Freesurfer process just fine.

However, There are a lot of differences between the numerical results for the different scans. Please find Attached graphs of (some of ) the results of segmentation and parcellation of these 6 sequences from the statistical outputs.

Now, the problem is how to select the best scan from these results.

Does any body have a standard protocol for assessing images for analysis or a standard metric, e.g. goodness of fit, from the software that we can assess without having a gold standard?

Or any other tip is also appreciated.

Thanks in advance,

Sima.

-- Sima Chalavi, Ph.D. student

King's College London Institute of Psychiatry (IoP) Box P040, De Crespigny Park London SE5 8AF. Tel:+44-2078485702

BCN Neuroimaging Center (NIC) University Medical Center Groningen Antonius Deusinglaan 2 P.O. Box 196 9713 AW Groningen www.neuroimaging-DID.com < six_structural_statistics.pdf

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