Hi Dr. Fischl,

I had a couple subjects that failed recon-all. Although the error log said
recon-all failed at mri_watershed it looks like the root problem is a
couple steps earlier, because the nu.mgz looks too dark. This was
discussed in a previous thread from 2008.

http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg07293.html.

You wrote, "p.s. are the 001.mgz and 002.mgz dark? The orig.mgz? Sometimes
nu_correct can create very dark images, and there are some switches you
can loo through to correct them. Alternatively if it is the 001.mgz,
mri_convert has a scale option you can use."

On my subject 001.mgz looks good (there was no 002.mgz file). It is only
nu.mgz that looks too dark. It looks like the solution you gave then was
for a problematic 001.mgz file, but from your response it looks as if the
problem was nu.mgz the solution would be different. What are the switches
you can loop through to correct the nu.mgz.

Thanks,
Abid

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