# Creating a lumen from an STL file

**URL:** <https://discourse.slicer.org/t/creating-a-lumen-from-an-stl-file/15204>\
**Category:** Support\
**Created:** [December 23, 2020, 10:42pm UTC](https://discourse.slicer.org/t/creating-a-lumen-from-an-stl-file/15204 "2020-12-23T22:42:10Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Andreas](https://avatars.discourse-cdn.com/v4/letter/a/ee7513/32.png) [@Andreas](https://discourse.slicer.org/u/Andreas)\
**Post date:** [December 23, 2020, 10:42pm UTC](https://discourse.slicer.org/t/creating-a-lumen-from-an-stl-file/15204/1 "2020-12-23T22:42:10Z")

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Hello everyone,

I attached cylinders to my vessel model using CAD software and saved them as STL file and printed them. I poured epoxy resin into the printed vessel model to recreate the lumen. Unfortunately, I did not save this segmentation.

Is it possible to reconstruct the lumen afterwards by means of an STL file?

> **[Segmentation\_aci4 zylindernew.STL](https://www.dropbox.com/s/2igve0mud6rwe9v/Segmentation_aci4%20zylindernew.STL?dl=0)**
>
> Shared with Dropbox

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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:** [January 6, 2021, 12:12am UTC](https://discourse.slicer.org/t/creating-a-lumen-from-an-stl-file/15204/2 "2021-01-06T00:12:19Z")

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I loaded the STL file as segmentation by selecting “Segmentation” in Description column in Add data dialog. Then set segmentation geometry, specifying spacing of 0.1mm. Added caps to the open ends and fixed holes due to the incorrectly attached inflow/outflow cylinders (to make the lumen a closed space). Finally, filled in the lumen using Islands effect / Add island.

You can download the result from here: [Microsoft OneDrive](https://1drv.ms/u/s!Arm_AFxB9yqHxOl-Slfi-afs1g2opQ?e=yNPqbu)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/4/b/4b702a83e379582640395faa163a001795bf9701.png)

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**Author:** ![Andreas](https://avatars.discourse-cdn.com/v4/letter/a/ee7513/32.png) [@Andreas](https://discourse.slicer.org/u/Andreas)\
**Post date:** [January 6, 2021, 1:15am UTC](https://discourse.slicer.org/t/creating-a-lumen-from-an-stl-file/15204/3 "2021-01-06T01:15:45Z")

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Thank you very much for the detailed approach and editing of the file. You are a great support.