Problem with VMTK for vessel segmentation

Support
1

Hi, I am new to VMTK and I tried to follow the tutorial on https://na-mic.org/w/images/archive/4/40/20100107165806!TutorialVMTKCoronariesCenterlinesMRI_Winter2010AHM.pdf, but the version they were using was too old and I could not get it work.

2

Here is what I did:
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I was using the sample data provided on Slicer

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image1896×904 248 KB

Here is where the problem comes from. No matter how I change the parameters, I cant get the picture shown in the tutorial.
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image1878×847 298 KB

I was still using what I got from step 2. But it usually tuned out to be a random shape or nothing.

Any idea?