Parent vessel reconstruction vmtk command line

Hello,

I am using the parent vessel reconstruction technique outlined in : Parent vessel reconstruction | vmtk - the Vascular Modelling Toolkit

Unfortunatelly I am getting a “bumping” surface in the reconstructed parent (see the arrow in the attached figure). How can I “smooth” that bumping ? What settings in the command line should I play with?

Here it is the sequence of command lines I am using :

vmtk vmtkdelaunayvoronoi -ifile 203.vtp -removesubresolution 1 -voronoidiagramfile 203_voronoi.vtp
vmtk vmtkcenterlines -ifile 203.vtp -endpoints 1 --pipe vmtkcenterlineresampling -length 0.1 -ofile 203_forwardcl.vtp
python patchandinterpolatecenterlines.py . 0203 lateral
python clipvoronoidiagram.py . 0203
python paralleltransportvoronoidiagram.py . 0203 1