Hi - same issues as I just covered in the email to Stefano.
Cheers.
On 1 Mar 2008, at 04:50, Jason Stein wrote:
> Hello FSLers,
>
> I ran randomise with on a TBSS processed dataset with an option for
> cluster based thresholding. The output produced a sensible image
> that was not corrected for multiple comparisons
> (tbss_demean_vox_tstat) and a sensible image that was corrected for
> multiple comparisons without cluster thresholding
> (tbss_demean_max_tstat), but it produced an image in which the range
> was 0.000 to 0.000 in the cluster corrected value
> (tbss_demean_maxc_tstat). The command I used for randomise was:
>
> randomise -i all_FA_skeletonised -o tbss_demean -m
> AnteriorLimbInternalCapsule.nii -d design.mat -t design.con -n 5000 -
> c 3 -V -D
>
> Where AnteriorLimbInternalCapsule.nii is a mask of the Anterior Limb
> of the Internal Capsule based on the JHU Atlas in FSL. Is the
> reason I am getting zero values in the cluster corrected image
> because the thresholded (3 in this case) is too high? Or is it
> strange that there are no values above zero in the image?
>
> Thanks for any help!
> Jason
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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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