# VMTK centerline extraction trouble?

**URL:** <https://discourse.slicer.org/t/vmtk-centerline-extraction-trouble/16983>\
**Category:** Support\
**Tags:** segmentation, vmtk, centerlines\
**Created:** [April 7, 2021, 2:21pm UTC](https://discourse.slicer.org/t/vmtk-centerline-extraction-trouble/16983 "2021-04-07T14:21:00Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [April 14, 2021, 5:32am UTC](https://discourse.slicer.org/t/vmtk-centerline-extraction-trouble/16983/2 "2021-04-14T05:32:42Z")

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The centerline curve looks nice. Maybe the two endpoints are connected because you created a closed curve? Or maybe the smooth curve that connects the two endpoints are the centerline curve and it cannot follow the actual curve because you have chosen polynomial interpolation interpolation instead of spline? It is hard to guess. It would help if you could share your scene file (saved as .mrb).

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_[View the full topic](https://discourse.slicer.org/t/vmtk-centerline-extraction-trouble/16983)._