# Slicer3d through TotalSegmentator airway segmentation limited to 1–2 generations – how to extend to distal bronchi (G4–G5)?

**URL:** <https://discourse.slicer.org/t/slicer3d-through-totalsegmentator-airway-segmentation-limited-to-1-2-generations-how-to-extend-to-distal-bronchi-g4-g5/45943>\
**Category:** Community\
**Tags:** segmentation, airway-inspector\
**Created:** [January 27, 2026, 9:00am UTC](https://discourse.slicer.org/t/slicer3d-through-totalsegmentator-airway-segmentation-limited-to-1-2-generations-how-to-extend-to-distal-bronchi-g4-g5/45943 "2026-01-27T09:00:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![hadrien\_calmet](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hadrien_calmet/32/81838_2.png) [@hadrien\_calmet](https://discourse.slicer.org/u/hadrien_calmet)\
**Post date:** [January 27, 2026, 9:00am UTC](https://discourse.slicer.org/t/slicer3d-through-totalsegmentator-airway-segmentation-limited-to-1-2-generations-how-to-extend-to-distal-bronchi-g4-g5/45943/1 "2026-01-27T09:00:23Z")

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Hello everyone,

I am working on airway segmentation from a chest CT scan using 3D Slicer and the TotalSegmentator extension.

I successfully segmented the trachea and main bronchi, but the result is currently limited to generation 1–2 only. I would like to obtain a more detailed airway tree, ideally reaching generation 4 or 5, if the image resolution allows it.

Are there **specific parameters or presets** in TotalSegmentator that can help recover more distal airway generations?

Thank you very much for your help and for the amazing work on Slicer and TotalSegmentator.

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**Author:** ![hadrien\_calmet](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hadrien_calmet/32/81838_2.png) [@hadrien\_calmet](https://discourse.slicer.org/u/hadrien_calmet)\
**Post date:** [February 3, 2026, 4:20pm UTC](https://discourse.slicer.org/t/slicer3d-through-totalsegmentator-airway-segmentation-limited-to-1-2-generations-how-to-extend-to-distal-bronchi-g4-g5/45943/2 "2026-02-03T16:20:41Z")

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I reply to myself ! Finaly i used MONAIAuto3DSeg extantion and it worked very well !