[Mne_analysis] "Intensity too high" when using mne_watershed_bem

[Dan G Wakeman]

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On 2012 May 3, at 23:08 , Stephen Politzer-Ahles wrote:

> Hello,
> 
> mne_watershed_bem is exiting with the following error:
> 
> w=White Matter =Intensity too high (>240)...valid input ?

This error is due to the MRI data having unusually large values. It actually comes from FreeSurfer's mri_watershed program (called by mne_watershed_bem).  You would need to ask the FreeSurfer people about how the volumes are generated by the make average subject and any recommendations about using mri_watershed with them.

The analysis you describe does beg another question: Why do you want to generate a BEM for the average subject?

D
> 
> I'm running mne_watershed_bem on an average brain I created from 23 other
> participants using Freesurfer's make_average_subject. I've been able to do
> mne_watershed_bem without error on all the other subjects, but I get this
> error when using the average breain. Does anyone have any guesses what
> could be causing the error?
> 
> Thank you,
> Steve Politzer-Ahles
> 
> -- 
> Stephen Politzer-Ahles
> University of Kansas
> Linguistics Department
> http://www.linguistics.ku.edu/
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