Wrong centerline extracted

I’m trying to extract the centerline of this piece of aorta, but this is my result.
I followed all the steps of the tutorial on youtube (Vessel segmentation and centerline extraction using 3D Slicer and VMTK - YouTube)…

I usually find ‘Fill holes’ of ‘Smoothing’ effect useful in these cases. You should try different kernel sizes, as per hole sizes and segment size. Inspect your model throughout.

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