[Freesurfer] failed skill strip

Hi,

I have tried to run recon-all on an image and received the following error:

"White matter intensity 0 is lower than CSF intensity 19. Please examine input images. Will terminate...

MRIstripSkull failed.

The T1 images look fine, and I have run several similar brains with no problem. This is the first time this has happened. I am using version 4.4.0. Any thoughts on what the problem is?

Thanks, Dana

Dana W. Moore, Ph.D. Neuropsychology Fellow Cornell Neuropsychology Service Weill Medical College of Cornell University New York Presbyterian Hospital Department of Neurology & Neuroscience 428 East 72nd Street, Suite 500 New York, NY 10021 Phone: 212-746-2441 Fax: 212-746-5584 Email: dwm2003@med.cornell.edu