Hi - the thresholded images supplied with the probabilistic atlases
are maximum-probability summary images: i.e. for any given voxel,
find the structure with the maximum probability value across all
structures in the atlas, threshold this at the value shown in the
filename, and then if it survives thresholding, put the structure's
index number into the summary image at this voxel.
For more detail on the formation of the Juelich probability images,
see Simon Eickhoff's web page on his toolboxes.
cheers.
On 14 Sep 2007, at 16:43, Dr. Carol Docherty wrote:
> Hi,
>
> Can someone please tell me what the different Juelich probability
> atlases in FSL signify? How are their different thresholds
> determined for instance?
>
> Also is it possible to display different probability ranges (e.g.
> 90%, 80% etc) on them (as in the SPM Anatomy toolbox)?
>
> Thanks in advance,
>
> Carol
> --
> Dr Carol Docherty
> Postdoctoral MRI Scientist
> Department of Neurophysics
> Max-Planck Institute for Human Cognitive and Brain Sciences
> Stephanstraße 1A
> 04103 Leipzig
> Germany
>
> Tel: +49 (0)341 99 40 291
> Fax: +49 (0)341 99 40 221
> Email: [log in to unmask]
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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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