Darren,

I forgot to mention that you'll need to add 

-clean-bm

after the -no-wsgcaatlas flag, otherwise the prior brainmask.mgz will be
retained and the new one will be saved as brainmask.auto.mgz.

Nick


On Wed, 2012-09-05 at 09:54 -0500, Darren Gitelman wrote:
> Nick, List:
> 
>  
> 
> Still no luck with this data. See attached as an example. 
> 
>  
> 
> To get to this point I had run:
> 
>  
> 
> recon-all -all 
> 
>  
> 
> This ran to the error: mri_watershed Error:   GLOBAL region of the
> brain empty !
> 
>  
> 
> Then I followed your recommendation below
> 
>  
> 
> recon-all -s  <subjid> -skullstrip -no-wsgcaatlas, which had no errors
> and then
> 
> recon-all -s <subjid> -autorecon2 -autorecon3
> 
>  
> 
> This produced the result attached.
> 
>  
> 
> I then deleted this directory and re-imported all the dicom data for
> this subject. Looked at the images, which look fine.
> 
> Then I ran recon-all -s <subjid> -autorecon1
> 
>  
> 
> This fails with the mri_watershed error.
> 
>  
> 
> Then I ran recon-all -s  <subjid> -skullstrip -no-wsgcaatlas.
> 
>  
> 
> This runs without error but when I look at the brainmask.mgz it looks
> just like the attached image.
> 
>  
> 
> Is there some way to set the thresholds differently? The T1 image
> looks fine to me although perhaps the intensity is slightly less than
> usual, but it doesn't seem particularly noisy.
> 
>  
> 
> Darren
> 
>  
> 
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