Hi Paola,
that looks pretty bad. What version are you running? You can try using rhe 
expert opts to set the g/w intensities, or drop the dataset on our site and 
we'll take a look.
cheers
Bruce

On Tue, 28 Dec 2010, Paola Valsasina wrote:

>
>
> Dear Freesurfer experts,
>
>
>
> I have tried to analyze with Freesurfer a dataset of images acquired with a
> 3D T1 sequence without inversion pulse (unfortunately, it is simply a FFE
> sequence and not a MP-RAGE). Contrast between grey and white matter is not
> optimal in this image, and when I run -autorecon2 step I obtain a very bad
> output (attached).  "white/grey" surface seems to be where the pial surface
> is expected to be, and pial surface is in the middle of csf.
>
>
>
> In your opinion, is it possible to obtain meaningful results with these
> images or not? Is there any setting of post-processing that I can change in
> order to obtain better surfaces?
>
> Thank you for any suggestion
>
> Kind regards,
>
> Paola
>
>
>
>
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