Hi,
I would check the mask image saved inside the featquery output
directory (which is created inside the original FEAT output
directory). You may find that it doesn't quite overlap with your data,
if it is right at the front of the brain possibly. I would then have a
look at the log files in the featquery output directory to see if that
sheds any light on matters.
Cheers.
On 15 May 2009, at 20:00, Regina Lapate wrote:
> Dear fsl group,
>
> I am new to Featquery, and I am writing due to a problem that I have
> found
> while recently using it.
>
> What I was trying to do was to use a small functional mask from the
> orbitofrontal cortex region (a cluster extracted from the output of
> higher
> level analyzes) to extract values for each participant for a certain
> contrast. I used lower level directories as my input.
>
> However, when I looked at the output Featquery gave me for each
> participant,
> I was surprised to find that the mask was empty (zeroes) for about a
> fourth
> of them (I should mention that when binarizing the mask I tried to
> be as
> liberal as possible).
> My first thought was a registration problem, but when opening the
> standardized brains of a few of the participants for whom the mask was
> empty, I could not detect any inconsistencies... Other thoughts?
>
> Thanks for any advice,
>
> Regina
>
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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