# Volume of reference isodose

**URL:** <https://discourse.slicer.org/t/volume-of-reference-isodose/26211>\
**Category:** Support\
**Tags:** slicerrt, 3d-model\
**Created:** [November 13, 2022, 6:48am UTC](https://discourse.slicer.org/t/volume-of-reference-isodose/26211 "2022-11-13T06:48:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Van\_Tran\_Sang\_Huynh](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/van_tran_sang_huynh/32/15043_2.png) [@Van\_Tran\_Sang\_Huynh](https://discourse.slicer.org/u/Van_Tran_Sang_Huynh)\
**Post date:** [November 13, 2022, 6:48am UTC](https://discourse.slicer.org/t/volume-of-reference-isodose/26211/1 "2022-11-13T06:48:15Z")

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Hello, I am doing research on DVH of breast cancer radiotherapy, I need show tumor volume enveloped by 95% dose volume using 3DSlicer. I am having trouble with this. Please help !!!

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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:** [November 14, 2022, 4:08pm UTC](https://discourse.slicer.org/t/volume-of-reference-isodose/26211/2 "2022-11-14T16:08:15Z")

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> [@Van\_Tran\_Sang\_Huynh](#):
>
> I am having trouble with this

Can you please describe the trouble you are having? What do you do _exactly_, step by step? What do you expect to happen and what happens instead?