I thought about another alternative approach: flow propaggation. This is used
in vessel tracking. The flow front wave would propagate through our track and
integrate the FA accross its crossection. This should be possible to program
in VTK (Visualization Toolkit), which is anyway part of the FSL distribution,
because it is used in fslview. Anybody from the fslview developers would like
to add an idea?
cheers,
Martin
On Thursday 28 January 2010 19:29:40 Matt Glasser wrote:
> I had more thoughts about a general solution for this as well (don't know
> how much would be possible):
>
> 1) Feed a thresholded pathway into tbssskeleton and hope it spits out the
> core of highest intensity.
> 2) Determine the plane perpendicular to this core at each point along its
> length and the angles between this perpendicular plane and the three
> orthogonal planes that make up the original image.
> 3) Take the thresholded mask of the pathway and transform it according the
> angles above (make a flirt matrix with the appropriate angles, and apply
> it) so that the perpendicular plane is now parallel to the xy plane, and
> then select the slice of interest.
> 4) Resample this slice back onto the original image (use it as the
> reference image and apply an identity transform with flirt)
> 5) Measure the quantitative parameter of interest using this resampled
> slice mask.
> 6) Repeat steps 2-5 for all points along the length of the core.
>
> I think this would be a really useful capability for a lot of applications.
> I feel like step 2 is probably the hardest in that I can't think of a way
> to do it with FSL tools.
>
> Any improvements to the above would be most appreciated.
>
> Peace,
>
> Matt.
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