# RVXLiverSegmentation extension questions

**URL:** <https://discourse.slicer.org/t/rvxliversegmentation-extension-questions/25752>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [October 18, 2022, 1:46pm UTC](https://discourse.slicer.org/t/rvxliversegmentation-extension-questions/25752 "2022-10-18T13:46:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Gonzalo\_Rojas\_Costa](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/gonzalo_rojas_costa/32/5259_2.png) [@Gonzalo\_Rojas\_Costa](https://discourse.slicer.org/u/Gonzalo_Rojas_Costa)\
**Post date:** [October 18, 2022, 1:46pm UTC](https://discourse.slicer.org/t/rvxliversegmentation-extension-questions/25752/1 "2022-10-18T13:46:15Z")

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I am trying to use your 3D Slicer RVXLiverSegmentation plug-in, but I have some problems:

i) I specified all portal vein nodes. Why does the button “Extract Vessels from node tree” continue in gray color without activating it?  
ii) When I was trying to specify the nodes of the vessels, I tried to view the “node position help window”. But, that window appears completely white color. Without any tree vessels. Why?

Sincerely,

Gonzalo Rojas Costa