# Creating 3D printed model of Airways using CT

**URL:** <https://discourse.slicer.org/t/creating-3d-printed-model-of-airways-using-ct/10072>\
**Category:** Support\
**Created:** [February 2, 2020, 8:44pm UTC](https://discourse.slicer.org/t/creating-3d-printed-model-of-airways-using-ct/10072 "2020-02-02T20:44:26Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Zwell](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/zwell/32/5868_2.png) [@Zwell](https://discourse.slicer.org/u/Zwell)\
**Post date:** [February 2, 2020, 8:44pm UTC](https://discourse.slicer.org/t/creating-3d-printed-model-of-airways-using-ct/10072/1 "2020-02-02T20:44:26Z")

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Hi,

I am trying to make a 3D printed airway from CT scan. I have managed to do a version myself but it isn’t the best - I have seen online there is a Airway Segmentation Extension - how do I get access for this to use please?

Thanks

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**Author:** ![manjula](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/manjula/32/80981_2.png) [@manjula](https://discourse.slicer.org/u/manjula)\
**Post date:** [February 2, 2020, 11:58pm UTC](https://discourse.slicer.org/t/creating-3d-printed-model-of-airways-using-ct/10072/2 "2020-02-02T23:58:55Z")

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Go to View —\> Extension manager or ctrl + 4 --\> Install extensions --\> Slicer Airway segmentation --\> Install

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**Author:** ![Zwell](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/zwell/32/5868_2.png) [@Zwell](https://discourse.slicer.org/u/Zwell)\
**Post date:** [February 3, 2020, 9:40am UTC](https://discourse.slicer.org/t/creating-3d-printed-model-of-airways-using-ct/10072/3 "2020-02-03T09:40:51Z")

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Perfect - Thank you so much!

Next question…

So I have managed to managed to download the extension and have placed the point within the trachea and hit apply - but it only comes up with a small dot rather than expanding to the whole airways like the tutorial - any ideas?

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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:** [February 3, 2020, 5:31pm UTC](https://discourse.slicer.org/t/creating-3d-printed-model-of-airways-using-ct/10072/4 "2020-02-03T17:31:14Z")

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I’ve just tried and it worked well for me, but I guess the results may depend on image quality. For segmenting more challenging images, I would recommend to install “SegmentEditorExtraEffects” extension, then segment the airways using Segment Editor module using Fast marching effect: