# How to annotate Bronchopulmonary segments in CT on 3D Slicer ?

**URL:** <https://discourse.slicer.org/t/how-to-annotate-bronchopulmonary-segments-in-ct-on-3d-slicer/23046>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [April 20, 2022, 11:28am UTC](https://discourse.slicer.org/t/how-to-annotate-bronchopulmonary-segments-in-ct-on-3d-slicer/23046 "2022-04-20T11:28:28Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![rbumm](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/rbumm/32/9404_2.png) [@rbumm](https://discourse.slicer.org/u/rbumm)\
**Post date:** [April 20, 2022, 1:19pm UTC](https://discourse.slicer.org/t/how-to-annotate-bronchopulmonary-segments-in-ct-on-3d-slicer/23046/2 "2022-04-20T13:19:03Z")

</div>

Hello Joris,

You may want to try the Lung CT Segmenter module of the **Lung CT Analyzer extension** which includes an [option for airway segmentation](https://discourse.slicer.org/t/lung-ct-segmenter-with-local-threshold-airway-segmentation/22065).

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/0/8/0804d71351003c86b65a8c2b3730b33113729b03.png)

I manually annotated one of the segmentations like this:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/a/aac3a2c0f5590f1a87fbdbc04e61f4524424a130.jpeg)

There is no computerized bronchopulmonary segment _annotation_ available in Slicer yet - it would probably be interesting to train AI on a set of segmentations to do this automatically or use the VMTK for centerline calculations.

---

_[View the full topic](https://discourse.slicer.org/t/how-to-annotate-bronchopulmonary-segments-in-ct-on-3d-slicer/23046)._