[Mrtrix-discussion] colourcoded count images; ROIs after tractography

[Donald Tournier]

Hi Kerstin,

Currently, I'm afraid the answer to both questions is no. That said,
it should be a relatively task to code these up, since they're both
fairly trivial modifications of the existing code. I won't have the
time to sit down and do it in the near future, but if I have a spare
minute I'll give it a shot. Maybe someone else out there is feeling
particularly brave and wants to give it a try...?

Also, there's a slight ambiguity in how you would obtain your
voxel-wise track orientation, since averaging orientations is not
immediately obvious. I think the best way I've heard of for doing it
is via the so-called dyadic tensor (for those who may be interested in
having a go ;).

Sorry I can't help any more than that right now...
Cheers,

Donald.


On Tue, Feb 3, 2009 at 3:11 PM, Kerstin Pannek <k.pannek1 at uq.edu.au> wrote:
> Dear MRtrix experts
> I was just wondering if it is possible to extract the fibre orientation from
> *.tck images on a voxel-wise basis - to get something like a colourcoded
> count image.
> Also, I would like to know if it is possible to apply inclusion/exclusion
> ROIs _after_ streamtrack has finished.
> Thanks for your help
> Cheers
> Kerstin
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-- 
Jacques-Donald Tournier (PhD)
Brain Research Institute, Melbourne, Australia
Tel: +61 (0)3 9496 4078