# relative dose value in color legend/DVH

**URL:** <https://discourse.slicer.org/t/relative-dose-value-in-color-legend-dvh/29114>\
**Category:** Support\
**Tags:** dicom, radiotherapy, color, rtdose\
**Created:** [April 25, 2023, 11:14am UTC](https://discourse.slicer.org/t/relative-dose-value-in-color-legend-dvh/29114 "2023-04-25T11:14:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![VVCJ](https://avatars.discourse-cdn.com/v4/letter/v/edb3f5/32.png) [@VVCJ](https://discourse.slicer.org/u/VVCJ)\
**Post date:** [April 25, 2023, 11:14am UTC](https://discourse.slicer.org/t/relative-dose-value-in-color-legend-dvh/29114/1 "2023-04-25T11:14:39Z")

</div>

Hi all,

I input the CT and RTDose data to review the dose distribution. By default, the color legend and DVH shows the absolute dose value (Gy) stored in RTDose.dcm. I was wondering if I could show the relative dose (%) and how to do it?

Sorry I’m new to Slicer and thank you in advance!

 ![Capture](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/6/2/623418651b6867d3243929b6fbc6e3f4aa2547c8.png)