Hi Alex - for tractography, 50 is a good compromise. If you need to show histograms of voxelwise posterior distributions, you can increase that number provided you can deal with the size of the output 4D files.
Cheers
Saad
On 21 Jun 2012, at 11:40, Alexandre Savio wrote:
> Hello,
>
> How many samples it is recommended to obtain with bedpostx/xfibres for a posterior probtrackx analysis? Are the default 50 samples enough?
>
> Thanks.
>
> My kind regards,
>
> Alex
>
--
Saad Jbabdi
University of Oxford, FMRIB Centre
JR Hospital, Headington, OX3 9DU, UK
(+44)1865-222466 (fax 717)
www.fmrib.ox.ac.uk/~saad
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