# ARIA RadOnc STructure Sets as a Scalar Volume - won't load

**URL:** <https://discourse.slicer.org/t/aria-radonc-structure-sets-as-a-scalar-volume-wont-load/7044>\
**Category:** Support\
**Created:** [June 5, 2019, 9:42pm UTC](https://discourse.slicer.org/t/aria-radonc-structure-sets-as-a-scalar-volume-wont-load/7044 "2019-06-05T21:42:22Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Noor\_Al-Zanoon](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/noor_al-zanoon/32/3900_2.png) [@Noor\_Al-Zanoon](https://discourse.slicer.org/u/Noor_Al-Zanoon)\
**Post date:** [June 5, 2019, 9:42pm UTC](https://discourse.slicer.org/t/aria-radonc-structure-sets-as-a-scalar-volume-wont-load/7044/1 "2019-06-05T21:42:22Z")

</div>

Hello!  
I am trying to load in Radiation dose map into slicer, but I am getting the following error message: ARIA RadOnc STructure Sets as a Scalar Volume - won’t load  
Operating system:Windows 10  
Slicer version: 4.10.1

---

<div class="post-metadata">

**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:** [June 5, 2019, 11:08pm UTC](https://discourse.slicer.org/t/aria-radonc-structure-sets-as-a-scalar-volume-wont-load/7044/2 "2019-06-05T23:08:54Z")

</div>

You need to install SlicerRT extension to be able to load DICOM RTSTRUCT information objects.