[Insight-users] vector field regularization and fiber tra cking

[Luis Ibanez]

Hi Hai,

You can regularize the eigenvectors by using the
VectorGradientAnisotropicDiffusion filter.

http://www.itk.org/Insight/Doxygen/html/classitk_1_1VectorGradientAnisotropicDiffusionImageFilter.html

Note that this only makes sense if you regularize ONLY the principal
eigen vector.  If you attempt to regularize each eigen vector field
independently, they will no longer satisfy their orthogonality
constraints.




There are several groups who have done fiber tracking using ITK and VTK:

They include groups at UNC Chapel-Hill, the University of Iowa
and the BWH at Harvard.  You will find information about these
efforts in the Wiki page of the NAMIC alliance:


    http://wiki.na-mic.org/Wiki/index.php/Main_Page



Software modules for computing fiber tracking are available as
part of the  open source application "Slicer" that you can
download from :

                www.slicer.org


Regards,


    Luis


======================
Hai Li wrote:
> Hi Everyone:
>    I am doing  fiber tracking using streamling method. In the 
> region where fiber tracts cross, the major tensor eigenvectors are in 
> disorder, so the fiber tracking usually stop at these points and the 
> fiber tracts are broken.
>    I think maybe i should regularize the vector field or the major 
> tensor eigenvectors field before fiber tracking. But i don't konw how to 
> do it? Is there such functionality in ITK ? BTW, has any fiber tracking 
> algorithm been accomplished in ITK? 
>    Can anybody gieve me some hint or clue? 
>    Any help will be appreciated.
> Best. Hai
>  
>  
> 
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