Extract Centerlines cannot work with cyclical vessels?

Hi, I used the Extract Centerlines tool on a Circle of Willis surface. The network is connected without an issue but the centerlines have a single vessel that it did not pass through (see image below). How do I adjust the Extract Centerlines tool to have the centerlines extracted properly?

That’s correct. The “centerline extraction” method in “Extract Centerline” module computes shortest paths between source and destination points, therefore it always extracts tree(s). To process circular topology, you can add two points somewhere to break the circle or use the “network extraction” algorithm of the “Extract Centerline” module. See more information in the VMTK Slicer extension’s documentation.

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