[Mrtrix-discussion] average tracks

[J-Donald Tournier]

Hi Hak,

Seems to me what you're after is something like this:

   1. For each subject, use "tracks2prob" to generate an image of the
   number of streamlines through each voxel (i.e. a track density image).
   2. threshold each map at some suitable value using "threshold -abs"
   3. add up all of these images across subjects using "mradd"

That should give you an image where the value in each voxel is the number
of subjects who had more than a given number of streamlines through that
voxel. You can display that as you like, probably as an overlay on some
other image with whatever colour mapping you want, which you can do in
MRView.

Cheers,
Donald.


On 5 May 2015 at 11:25, Hak Fujiyama <Hak.Fujiyama at faber.kuleuven.be> wrote:

>  Hello all,
>
> Could anyone help us with the averaging tracks.
>
> We got individual tracks, but we would like to make an average track file
> (tck) for a display purpose.
>
> Preferably, we would like to show a color coded tracks indicating number
> of subjects which show common tracks as in FSL.
>
> Best regards,
>
> Hak
>
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-- 
*Dr J-Donald Tournier (PhD)*

*Senior Lecturer, **Biomedical Engineering*

*Division of Imaging Sciences & Biomedical EngineeringKing's College London*


*A: Department of Perinatal Imaging & Health, 1st Floor South Wing, St
Thomas' Hospital, London. SE1 7EH*
*T: +44 (0)20 7188 7118 ext 53613*
*W: http://www.kcl.ac.uk/medicine/research/divisions/imaging/departments/biomedengineering
<http://www.kcl.ac.uk/medicine/research/divisions/imaging/departments/biomedengineering>*
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