# Calculate volumes on ct scans

**URL:** <https://discourse.slicer.org/t/calculate-volumes-on-ct-scans/10540>\
**Category:** SlicerCIP\
**Created:** [March 4, 2020, 1:22pm UTC](https://discourse.slicer.org/t/calculate-volumes-on-ct-scans/10540 "2020-03-04T13:22:57Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Giuseppe\_Voltini](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/giuseppe_voltini/32/5250_2.png) [@Giuseppe\_Voltini](https://discourse.slicer.org/u/Giuseppe_Voltini)\
**Post date:** [March 4, 2020, 1:22pm UTC](https://discourse.slicer.org/t/calculate-volumes-on-ct-scans/10540/1 "2020-03-04T13:22:57Z")

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Operating system:windows 10  
Slicer version: 4.10.2  
Expected behavior:  
Actual behavior:

Is it possible to automatically calculate on a chest ct scan the volume of a lung lesion, or multiple lung lesions , using Hounsfield scale density criteria?  
Thank you

Giuseppe

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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:** [March 4, 2020, 2:45pm UTC](https://discourse.slicer.org/t/calculate-volumes-on-ct-scans/10540/2 "2020-03-04T14:45:37Z")

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Yes if you segment it based on your intensity range then you can use segment statistics module to calculate the volume and many other parameters

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**Author:** ![Giuseppe\_Voltini](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/giuseppe_voltini/32/5250_2.png) [@Giuseppe\_Voltini](https://discourse.slicer.org/u/Giuseppe_Voltini)\
**Post date:** [March 5, 2020, 10:11am UTC](https://discourse.slicer.org/t/calculate-volumes-on-ct-scans/10540/3 "2020-03-05T10:11:10Z")

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THank you! and how can I segment automatically using a density range?: I’m working on ards from coronavirus pneumonia trying to distinguish automatically the “ggo” areas from consolidation

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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:** [March 5, 2020, 10:58am UTC](https://discourse.slicer.org/t/calculate-volumes-on-ct-scans/10540/4 "2020-03-05T10:58:25Z")

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There are many options. You can use segment editor module. Also install the segment editor extra effects. Simplest is thresholding. But there are many other advanced methods available. You will also may need to crop or mask the region of interest. To get rid of unnecessary regions. There are many tutorials online on this

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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:** [March 5, 2020, 1:13pm UTC](https://discourse.slicer.org/t/calculate-volumes-on-ct-scans/10540/5 "2020-03-05T13:13:36Z")

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> [@Giuseppe\_Voltini](#):
>
> I’m working on ards from coronavirus pneumonia trying to distinguish automatically the “ggo” areas from consolidation

I’m sure we’d all like to help you with that!

If you have any example data that you can share we can provide more concrete suggestions. @manjula’s suggestions are a great place to start.