Hepatic vessels segmentation

What is the best way to segment the intrahepatic vasculature? I have a CT with low intravenous contrast. Is there any automated extension ?? I
Ihave tried with threshold, but I don’t get anything with quality.

Thank you in advance

You could find useful the following tutorial Liver vessels.
There is this helpful Segmentation recipe as well. The task is different from yours, but maybe you can find some inspiration. It requires the VMTK extension.
I hope it will help you.

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