# Calculating DVHs for models

**URL:** <https://discourse.slicer.org/t/calculating-dvhs-for-models/6940>\
**Category:** Support\
**Created:** [May 27, 2019, 5:43pm UTC](https://discourse.slicer.org/t/calculating-dvhs-for-models/6940 "2019-05-27T17:43:22Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![aseman](https://avatars.discourse-cdn.com/v4/letter/a/c0e974/32.png) [@aseman](https://discourse.slicer.org/u/aseman)\
**Post date:** [May 27, 2019, 5:43pm UTC](https://discourse.slicer.org/t/calculating-dvhs-for-models/6940/1 "2019-05-27T17:43:22Z")

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Slicer version:4.10.1  
Hi 3D slicer experts and all  
Is it possible to calculate DVHs for models( instead of segments ) using Dose Volume Histogram module?  
Thanks a lot

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [May 27, 2019, 6:17pm UTC](https://discourse.slicer.org/t/calculating-dvhs-for-models/6940/2 "2019-05-27T18:17:52Z")

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DVH module only accepts segmentations as input, but it’s very easy to convert models to segmentation:

- In Models module, right-click the scene and choose ‘Insert hierarchy’
- Go to Data module, select the models, and drag&drop them under the hierarchy (will be called ‘Model Hierarchy’ by default
- Right-click the hierarchy, and choose ‘Convert model hierarchy to segmentation node’