# Hi I need to segment each lung volume into 6 segments using well-defined landmarks but I do not know how to create these additional segments

**URL:** <https://discourse.slicer.org/t/hi-i-need-to-segment-each-lung-volume-into-6-segments-using-well-defined-landmarks-but-i-do-not-know-how-to-create-these-additional-segments/25901>\
**Category:** Support\
**Tags:** lung\
**Created:** [October 25, 2022, 3:50pm UTC](https://discourse.slicer.org/t/hi-i-need-to-segment-each-lung-volume-into-6-segments-using-well-defined-landmarks-but-i-do-not-know-how-to-create-these-additional-segments/25901 "2022-10-25T15:50:37Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![02gennaio](https://avatars.discourse-cdn.com/v4/letter/0/76d3ee/32.png) [@02gennaio](https://discourse.slicer.org/u/02gennaio)\
**Post date:** [October 25, 2022, 3:50pm UTC](https://discourse.slicer.org/t/hi-i-need-to-segment-each-lung-volume-into-6-segments-using-well-defined-landmarks-but-i-do-not-know-how-to-create-these-additional-segments/25901/1 "2022-10-25T15:50:37Z")

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Operating system:  
Slicer version:  
Expected behavior:  
Actual behavior:

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [October 25, 2022, 4:02pm UTC](https://discourse.slicer.org/t/hi-i-need-to-segment-each-lung-volume-into-6-segments-using-well-defined-landmarks-but-i-do-not-know-how-to-create-these-additional-segments/25901/2 "2022-10-25T16:02:14Z")

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Did you look at the Segment Editor documentation? [Image Segmentation — 3D Slicer documentation](https://slicer.readthedocs.io/en/latest/user_guide/image_segmentation.html)

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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:** [October 25, 2022, 5:37pm UTC](https://discourse.slicer.org/t/hi-i-need-to-segment-each-lung-volume-into-6-segments-using-well-defined-landmarks-but-i-do-not-know-how-to-create-these-additional-segments/25901/3 "2022-10-25T17:37:35Z")

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Which well-defined landmarks do you have?

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**Author:** ![02gennaio](https://avatars.discourse-cdn.com/v4/letter/0/76d3ee/32.png) [@02gennaio](https://discourse.slicer.org/u/02gennaio)\
**Post date:** [October 25, 2022, 8:25pm UTC](https://discourse.slicer.org/t/hi-i-need-to-segment-each-lung-volume-into-6-segments-using-well-defined-landmarks-but-i-do-not-know-how-to-create-these-additional-segments/25901/4 "2022-10-25T20:25:53Z")

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I would start with using these 2 planes:  
-one horizontal plane touching the inferior aspect of the end of main bronchi(i.e., when they divide) to dissect upper from lower lung segments  
-one coronal plane passing trough the anterior aspect of the vertebra T12