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Hi Samantha

Have a look at this doc page www.fmrib.ox.ac.uk/fsl/fdt/fdt_surface.html

It explains how to register label files into diffusion space (for your FA analysis) and how to use label files as seeds for probtrackx.

If you prefer seeding from voxels, you can always transform your label file into a volume using the freesurfer command mri_label2vol.

Cheers,

Saad.

On 7 Mar 2011, at 00:38, Samantha Clark wrote:

Hi All,

I have custom-generated freesurfer surface labels and am interested in quantifying FA in these labels from the FA maps generated using FDT. Can you help me extract these values.

Also, if I want to use these labels as seed points, how do I go about converting this label to a format compatible with probtrack.

Thanks.

Samantha

Saad Jbabdi

University of Oxford, FMRIB Centre

JR Hospital, Headington, OX3 9DU, UK

(+44)1865-222466 (fax 717)