# Airway segmentation trouble - Lung CT Segmentation

**URL:** <https://discourse.slicer.org/t/airway-segmentation-trouble-lung-ct-segmentation/30304>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [June 29, 2023, 4:16pm UTC](https://discourse.slicer.org/t/airway-segmentation-trouble-lung-ct-segmentation/30304 "2023-06-29T16:16:43Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![phpg](https://avatars.discourse-cdn.com/v4/letter/p/958977/32.png) [@phpg](https://discourse.slicer.org/u/phpg)\
**Post date:** [June 29, 2023, 4:16pm UTC](https://discourse.slicer.org/t/airway-segmentation-trouble-lung-ct-segmentation/30304/1 "2023-06-29T16:16:43Z")

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Hi everyone,

I have been using the Lung CT Segmenter without any trouble to initiate the segmentation. However, I recently encountered an issue with the airway segmentation. The problem is that the algorithm is including the entire lung as part of the airway segment (refer to the attached images). I have attempted to adjust the level of detail (low, medium, high) and lung threshold, but I haven’t been successful in resolving the problem. The airway segmentation appears to be correct during the marking process, but when I click “Apply” to finalize the changes, the problem arises.  
Could anyone please help me understand what I might be doing wrong or provide a solution to this issue? Your assistance would be greatly appreciated.

Thank you.

 ![Captura de Tela 2023-06-29 às 08.46.33](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/a/aa873168b84efa0a984fc6b3ede94ac700e4c4f3.jpeg)

 ![Captura de Tela 2023-06-29 às 09.44.40](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/9/59e631e8a68434fa73fc6485ee99c47c537dbce7.jpeg)

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**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:** [June 29, 2023, 5:35pm UTC](https://discourse.slicer.org/t/airway-segmentation-trouble-lung-ct-segmentation/30304/2 "2023-06-29T17:35:23Z")

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Are you using the latest version of the extension ? Try “very low detail” please.

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**Author:** ![phpg](https://avatars.discourse-cdn.com/v4/letter/p/958977/32.png) [@phpg](https://discourse.slicer.org/u/phpg)\
**Post date:** [June 29, 2023, 5:55pm UTC](https://discourse.slicer.org/t/airway-segmentation-trouble-lung-ct-segmentation/30304/3 "2023-06-29T17:55:29Z")

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Version: Chest CTAnalyzer e72868C (published: 22.02.2023)

Tried very low detail, but did not solve the problem.

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**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:** [June 29, 2023, 6:03pm UTC](https://discourse.slicer.org/t/airway-segmentation-trouble-lung-ct-segmentation/30304/4 "2023-06-29T18:03:04Z")

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What does the LungCTAnalyzer version number display please?

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**Author:** ![phpg](https://avatars.discourse-cdn.com/v4/letter/p/958977/32.png) [@phpg](https://discourse.slicer.org/u/phpg)\
**Post date:** [June 29, 2023, 6:12pm UTC](https://discourse.slicer.org/t/airway-segmentation-trouble-lung-ct-segmentation/30304/5 "2023-06-29T18:12:53Z")

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Sorry, the version I posted some minutes ago concern Lung CT Analyzer

 ![Captura de Tela 2023-06-29 às 15.12.19](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/6/e/6e337233ec69283e721dab9d83fc0a33fc6f96e3.jpeg)

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**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:** [June 29, 2023, 6:54pm UTC](https://discourse.slicer.org/t/airway-segmentation-trouble-lung-ct-segmentation/30304/7 "2023-06-29T18:54:59Z")

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Try to crop the volume and please try standard datasets. If necessary please share the data if you can.