# Segmentation and radiomics

**URL:** <https://discourse.slicer.org/t/segmentation-and-radiomics/5490>\
**Category:** Support\
**Tags:** segmentation, radiomics\
**Created:** [January 24, 2019, 12:26am UTC](https://discourse.slicer.org/t/segmentation-and-radiomics/5490 "2019-01-24T00:26:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![marline19](https://avatars.discourse-cdn.com/v4/letter/m/8edcca/32.png) [@marline19](https://discourse.slicer.org/u/marline19)\
**Post date:** [January 24, 2019, 12:26am UTC](https://discourse.slicer.org/t/segmentation-and-radiomics/5490/1 "2019-01-24T00:26:18Z")

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Hello I have some questions about segmentation and radiomics programms. How I can create segmentation of high grade glioma and then use radiomics? I don’ t understand how its work because when we do segmentation we must take account of tumor+ necrosis and edema. Sorry for my english. Help me please.

Elena

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**Author:** ![fedorov](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/fedorov/32/14_2.png) [@fedorov](https://discourse.slicer.org/u/fedorov)\
**Post date:** [January 24, 2019, 6:21pm UTC](https://discourse.slicer.org/t/segmentation-and-radiomics/5490/2 "2019-01-24T18:21:09Z")

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Once you install the Radiomics extension, you will be able to calculate radiomics features for every segment defined for your image. If you segment edema/necrosis separately, you will have separate set of features for each of those regions. If you want a single set of features for the whole tumor, then you will need to create a single segmentation segment that includes all of those. You can use “merge” functionality from the Segment Editor to merge multiple segments.