# Merge CT and RT Dose File

**URL:** https://discourse.slicer.org/t/merge-ct-and-rt-dose-file/20098
**Category:** Support
**Tags:** registration, rtdose
**Created:** [October 11, 2021, 9:58am UTC](https://discourse.slicer.org/t/merge-ct-and-rt-dose-file/20098 "2021-10-11T09:58:42Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Cody\_Xie](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cody_xie/32/10261_2.png) [@Cody\_Xie](https://discourse.slicer.org/u/Cody_Xie)
#### Post date: [October 11, 2021, 9:58am UTC](https://discourse.slicer.org/t/merge-ct-and-rt-dose-file/20098/1 "2021-10-11T09:58:42Z")

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Hi to all,

I have three files: a **CT data set** , a **RS structures file** and a **RT Dose file**. After importing these three data into Slicer, I found that the CT and Dose data cannot be visualized at the same time (see the picture below). What I want to do is to **visualize the Dose on CT**.

 ![Slicer-Original](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/7/c7d82f211a54e9215515154a9f9ec7d3d6218687.png)

I read the manual SlicerVisualizationTutorial ([SlicerVisualizationTutorial](https://spujol.github.io/SlicerVisualizationTutorial/)) and used the Volume Rendering feature. However, I **still cannot visualize the CT and Dose at the same time** , although the two “eyes” can be opened simultaneously (see the picture below).

 ![Slicer-Volume Rendering](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/e/2e52f25cce5fd077f11f096826678ee74b2cd9ce.jpeg)

Could anyone give me some instructions on how to merge the CT and Dose? Any help from your side will be much appreciated!

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### 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: [October 11, 2021, 1:46pm UTC](https://discourse.slicer.org/t/merge-ct-and-rt-dose-file/20098/2 "2021-10-11T13:46:12Z")

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On a recent Slicer Preview Release, you can select the dose and CT at the same time (using Ctrl+Click) and drag-and-drop them to a view.

Alternatively, you can [use the slice view controls to select what volumes are shown in a view](https://slicer.readthedocs.io/en/latest/user_guide/modules/volumes.html#overlay-two-volumes).

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<div class="post-metadata">

### Author: ![Cody\_Xie](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cody_xie/32/10261_2.png) [@Cody\_Xie](https://discourse.slicer.org/u/Cody_Xie)
#### Post date: [October 11, 2021, 2:04pm UTC](https://discourse.slicer.org/t/merge-ct-and-rt-dose-file/20098/3 "2021-10-11T14:04:12Z")

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Thank you so much Andras! I solved this problem following your guidance.