On Tue, 2006-12-05 at 13:31 -0500, Bruce Fischl wrote:
Hi Li-Chen,
there is some intentional randomness in the algorithms. Try overlaying the surfaces and you'll see that they are visually identical I would think. Nick: is there a switch to recon-all to specify what the seed should be for the random # generators?
The -norandomness flag can be added to recon-all. It does not take a number as input. It will seed with the number '1234', which, by having this number hard-coded in recon-all, means that you don't have to remember what seed was used on some prior run.
Nick
thanks, Bruce
On Tue, 5 Dec 2006, Lichen Liang wrote:
Dear All, I tried to extract a surface from a MRI scan (T1, 1.5T) using Freesurfer 3.0.3 on a Linux computer. I just run "recon-all" script for the same scan 6 times (same computer, no human interaction). To my supprise, I got 6 different results ( different #triangles, #vertices). Go back to check the intermediate results, all T1.mgz, WM.mgz are identical, but lh.origdifferent. Can someone tell me why my results are not consistent? Thanks very much for your help. Li-Chen
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