# Write 3D model to CT images

**URL:** <https://discourse.slicer.org/t/write-3d-model-to-ct-images/47587>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [July 10, 2026, 7:41am UTC](https://discourse.slicer.org/t/write-3d-model-to-ct-images/47587 "2026-07-10T07:41:21Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![KarelPenicka](https://avatars.discourse-cdn.com/v4/letter/k/ebca7d/32.png) [@KarelPenicka](https://discourse.slicer.org/u/KarelPenicka)\
**Post date:** [July 10, 2026, 7:41am UTC](https://discourse.slicer.org/t/write-3d-model-to-ct-images/47587/1 "2026-07-10T07:41:21Z")

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Hello gentlemen. I have a 3D model of a mirrored healthy femur proximally aligned to the operated femur. In the 3D slicer I can see the difference and how they are superimposed. But I would like to write the 3D model into a CT, upload it to the hospital system as a CT so that doctors can review it. Do you have a tip on how to write this segmentation into individual layers? I will make a label map from the model, I need to write it into each layer and export it as DICOM.

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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:** [July 12, 2026, 2:47am UTC](https://discourse.slicer.org/t/write-3d-model-to-ct-images/47587/2 "2026-07-12T02:47:46Z")

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You can export to standard DICOM Segmentation Object by following these steps in Slicer-5.12 and later:

- Go to `Data` module
- Right-click on the segmentation node and select `Export to DICOM...` → by default, the export type will be `DICOMSegmentation` (if it is not, then make sure you use Slicer-5.12 or later)
- Check the `Export to folder` checkbox and select a folder for the DICOM segmentation files
- Click `Export`

If you want to push the DICOM Segmentation objects directly to the PACS then leave `Export to folder` checkbox unchecked, which will export the segmentation into the DICOM database. You can then push the segmentation directly to the PACS in the DICOM module.

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<div class="post-metadata">

**Author:** ![KarelPenicka](https://avatars.discourse-cdn.com/v4/letter/k/ebca7d/32.png) [@KarelPenicka](https://discourse.slicer.org/u/KarelPenicka)\
**Post date:** [July 13, 2026, 7:18am UTC](https://discourse.slicer.org/t/write-3d-model-to-ct-images/47587/3 "2026-07-13T07:18:44Z")

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Thanks for the information. This works when I want to convert the Object to DICOM. But I need to burn the Object directly into the CT. So that it is just a set of images.  
I tried exporting it as a Data Bundle but PACS won’t show it together.

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<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:** [July 13, 2026, 11:13am UTC](https://discourse.slicer.org/t/write-3d-model-to-ct-images/47587/4 "2026-07-13T11:13:03Z")

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You can use “Mask volume” effect on Segment Editor module to burn a segment into voxels of a CT image.