Following up on what I sent last week we tried running a participant
through freesurfer on a separate OS (centOS vs. unbuntu) and we still get
the exact same aseg.stats values. Not that I am complaining but is there a
way to get variable results in the aseg.stats output like we can with the
aparc.stats?
Thanks,
Keith
>>Hello,
Similar to the thread below we ran several subjects through the freesurfer
(v5.3.0) using the -randomess flag and noticed no differences in the
volumes in aseg.stats across the runs. Is this by design? This thread ended
here.
>Pernille,
Can you send me the recon-all.log file of one of the subjects?
Nick
On Fri, 2009-08-21 at 15:19 +0200, Pernille Iversen wrote:
>* Dear Nick,
*>* I have now used version 4.5.0 and the -randomness flag no longer gives
*>* errors, however, after 10 parallel runs of a subject with the
*>* -randomness flag set, I observe that the stats are completely
*>* identical. In the logs I can see that the line "setting seed for
*>* random number generator to 1234" is no longer there. In the earlier
*>* versions where the random initialisation was default I observed
*>* differences in the stats when I made the 10 parallel runs on the same
*>* subject as I have used this time - so it would seem that the random
*>* initialisation is not turned on when I use the flag. Can you please
*>* comment on this :)
*> >* Thanks,
*>* Pernille*
I also came across this thread separately which seems to indicate that the
-randomness flag only changes the cortical measures (which were different
across runs for the subjects):
>Hi Andreia,
>>
>> Then I would guess that your error comes from the fact that you
>> didn't rerun the autorecon3 at that stage for these 2 subjects. *As
>> the randomness flag changes the number of vertices when recreating
>> the surfaces*, that explains the error.
I'd appreciate any clarification.
Thanks,
Keith
--
Keith Harenski
Mobile MRI Manager
Mobile MRI Core and Clinical Cognitive Neuroscience Laboratory
The Mind Research Network
1101 Yale Blvd NE Albuquerque, NM 87106-4188
Office: 505.504.1338 | Fax: 505.272.8002
kharen...@mrn.org | www.mrn.org | www.lrri.org
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