Hi,
This doesn't sound like what is supposed to happen - maybe there is a
lot of non-brain material being left behind by the brain extraction?
Does the FAST output start to make more sense if you erode the brain-
extracted image further? If it still looks odd then feel free to
upload the original and brain-extracted image and FAST output and we
can take a look.
Cheers.
On 9 Oct 2008, at 21:38, Bhargav Kumar Errangi wrote:
> Hello Everyone,
> I noticed that the default partial volume classification of a T1-
> weighted
> image ( After Brain extraction ) produced three different classes of
> images
> using the latest version of fast as opposed to GM , WM and CSF partial
> volume maps (default):
> 1. A region outside the brain outlining it.(There is no tissue in
> the input
> image).
> 2. The second map consists mostly CSF.
> 3. Third partial volume includes both gray and white matter.
> I ran the partial volume classification(default) using the previous
> versions of FAST, but never noticed this problem. I am just curious
> whether
> I am the only one or someone else had the same issue.
> Thank you very much for your help in advance,
> Bhargav
>
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Stephen M. Smith, Professor of Biomedical Engineering
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FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
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