Hi - yes, ventricles can be tricky, though the right MR contrast can
help a lot in separating them. Possibly the best off-the-shelf
approach right now is the new "aseg" segmentation that you get when
you run a full FreeSurfer analysis - you could try that.
Cheers, Steve.
On 4 Apr 2006, at 09:49, Martin Kavec wrote:
> Hi,
>
> I hope this is not too much off topic, but I was hoping that
> someone on this
> list may know a good way to segment ventricles (lateral only) from
> T1-weighted images. I found one thread in the list archives way
> back in 2002
> mentioning this topic (Steve Smith and Wei Wen), but it was not very
> specific.
>
> So far, I used FAST to get the CSF mask (giving me superb results)
> and then I
> tried "snakes" http://www.itksnap.org/ to get just the ventricles. The
> problem with the latter method is that the results are very much
> dependent on
> where the operator places initial spheres. And also, the snakes don't
> propagate to narrow regions of the ventricles, even with tweaked
> parameters.
>
> I would very much appreciate if someone could point me to a right
> direction.
> Thanks a lot in advance.
>
> Martin
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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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