# Create derived segments with AAPM nomenclature form TotalSegmentator output

**URL:** <https://discourse.slicer.org/t/create-derived-segments-with-aapm-nomenclature-form-totalsegmentator-output/27817>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [February 15, 2023, 4:30am UTC](https://discourse.slicer.org/t/create-derived-segments-with-aapm-nomenclature-form-totalsegmentator-output/27817 "2023-02-15T04:30:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![LipTeck\_Chew](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lipteck_chew/32/13519_2.png) [@LipTeck\_Chew](https://discourse.slicer.org/u/LipTeck_Chew)\
**Post date:** [February 15, 2023, 4:30am UTC](https://discourse.slicer.org/t/create-derived-segments-with-aapm-nomenclature-form-totalsegmentator-output/27817/1 "2023-02-15T04:30:23Z")

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Hi Steve and Lassoan,

Is there possibility to segment the oargan at risks and treatment planning pseudo structures and name according to AAPM nomenclatures?

> **[RPT\_263.pdf](https://www.aapm.org/pubs/reports/RPT_263.pdf)**
>
> 2.80 MB

regards,  
LipTeck

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [February 15, 2023, 5:19am UTC](https://discourse.slicer.org/t/create-derived-segments-with-aapm-nomenclature-form-totalsegmentator-output/27817/2 "2023-02-15T05:19:05Z")

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Probably Segment Editor can perform all the necessary operations to create derived structures (add margin, apply Boolean operations, etc.). All these operations can be performed either using the GUI or Python scripting (or a combination of both).