# Problem of vtkvmtkMergeCenterlines

**URL:** https://discourse.slicer.org/t/problem-of-vtkvmtkmergecenterlines/34095
**Category:** VMTK
**Created:** [February 1, 2024, 3:22pm UTC](https://discourse.slicer.org/t/problem-of-vtkvmtkmergecenterlines/34095 "2024-02-01T15:22:54Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![chuanqiWen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chuanqiwen/32/69199_2.png) [@chuanqiWen](https://discourse.slicer.org/u/chuanqiWen)
#### Post date: [February 1, 2024, 3:22pm UTC](https://discourse.slicer.org/t/problem-of-vtkvmtkmergecenterlines/34095/1 "2024-02-01T15:22:54Z")

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Taking the result of vtkvmtkCenterlineBranchExtractor as input to vtkvmtkMergeCenterlines, the final result obtained is empty