# Obtaining Surface Area from Volume Shape

**URL:** <https://discourse.slicer.org/t/obtaining-surface-area-from-volume-shape/30529>\
**Category:** Support\
**Tags:** segmentation, lung\
**Created:** [July 11, 2023, 7:36pm UTC](https://discourse.slicer.org/t/obtaining-surface-area-from-volume-shape/30529 "2023-07-11T19:36:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![JasonMunoz](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@JasonMunoz](https://discourse.slicer.org/u/JasonMunoz)\
**Post date:** [July 11, 2023, 7:36pm UTC](https://discourse.slicer.org/t/obtaining-surface-area-from-volume-shape/30529/1 "2023-07-11T19:36:18Z")

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OS: Windows 11  
Version: 3D Slicer 5.2.2

Good morning,

I am relatively new to the world of 3D Slicer and had some questions for the use of the program. Obviously, some questions I ask may be very easy to deny/accept because I have not used the program for long enough to know, with stability, if a feature is available or not. That being said, please take kind regards with my questions, I appreciate it and your help greatly.

I was interested in discovering the surface area of the airways shown in my CT scans of the lung region. Namely, I wanted to use the Model given in the Volume Rendering \> Display \> Preset: CT Air, as it looked the best. I’ve read around and watched videos explaining how Segmentation was the only way to retrieve information(Surface Area) in a 3D model. I was hoping to somehow extract these Airways automatically, so that I can efficiently retrieve data of the Airways.

Thank you for reading and your response, any advice would help greatly.

Best,  
Jason Munoz

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [July 11, 2023, 7:39pm UTC](https://discourse.slicer.org/t/obtaining-surface-area-from-volume-shape/30529/2 "2023-07-11T19:39:26Z")

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You can start with the LungCTAnalyzer, which has an airway segmentation tool. Once you have the segmentation you can get the surface area with the SegmentStatistics module.

> **[GitHub - rbumm/SlicerLungCTAnalyzer: This is a 3D Slicer extension for...](https://github.com/rbumm/SlicerLungCTAnalyzer)**
>
> This is a 3D Slicer extension for segmentation and spatial reconstruction of infiltrated, collapsed, and emphysematous areas in lung CT. - GitHub - rbumm/SlicerLungCTAnalyzer: This is a 3D Slicer ...

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**Author:** ![JasonMunoz](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@JasonMunoz](https://discourse.slicer.org/u/JasonMunoz)\
**Post date:** [July 17, 2023, 8:43pm UTC](https://discourse.slicer.org/t/obtaining-surface-area-from-volume-shape/30529/3 "2023-07-17T20:43:42Z")

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Pieper,

Thank you for your assistance. I was unaware of this extension for 3D Slicer. I have been using the AirwaySegmentation Extension, but this program and your advice has given me the data that I need.

Many Thanks,  
Jason Munoz