Hello everybody,
I'm dealing with a reconstruction of two stenosesd carotid bifurcations by
DICOM sets of MRI black-blood images.
Since I couldn't perform level set segmentation by vmtk due to the
black-blood images, and since negating images entails a loss of information
in the stenosed area (stenosis became hard to disitinguish), I used a
commercial software for segmentation and I obtained a set of polylines.
Doing this, the first problem encountered has been lofting the surfaces
over the curves: at the bifurcation site lofting becomes impractical and I
could only loft CCA, ICA and ECA surfaces separately. I thought of using
vmtk to solve this problem and in particular I thought of
vmtksurfacemodeller script.
My idea was to input this script the entire *.stl geometry (of CCA, ICA and
ECA surfaces unlinked to each other), yielding a vti image and then
performing marching cubes.
This procedure succeeded for one of my carotids, and I tried to perform the
same sequence of comands also for a second carotid geometry that I need to
reconstruct. This time whithout any result: the vti image returned by
vmtksurfacemodeller is quitely noisy (I figure out it's due to
miscalculation of distance function near the bifurcation site).
Nevertheless I didn't give up! I thought of a second possible solution that
implies the use of vmtksurfacemodeller but in a different way.
I extracted separately vti images of respectively CCA, ICA and ECA branches
and I thought to compose the image with the script vmtkimagecompose but
without results.
Now I have three different images which I want to merge but I can't do this
and I can't understand if it is a possible task or, otherwise, I ought to
change approach.
Could you help me?
I thank you in advance
--
Giuseppe Isu
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