# Convert DICOM RTSS to DICOM segmentation

**URL:** <https://discourse.slicer.org/t/convert-dicom-rtss-to-dicom-segmentation/19738>\
**Category:** Support\
**Tags:** segmentation, dicom\
**Created:** [September 18, 2021, 3:59pm UTC](https://discourse.slicer.org/t/convert-dicom-rtss-to-dicom-segmentation/19738 "2021-09-18T15:59:41Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![piegou](https://avatars.discourse-cdn.com/v4/letter/p/8e7dd6/32.png) [@piegou](https://discourse.slicer.org/u/piegou)\
**Post date:** [September 18, 2021, 3:59pm UTC](https://discourse.slicer.org/t/convert-dicom-rtss-to-dicom-segmentation/19738/1 "2021-09-18T15:59:41Z")

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Hi,  
I want to convert structures in DICOM-RTSS format to DICOM seg format.  
Is it possible with Slicer-3D?If yes how  
thank you for helping me

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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:** [September 18, 2021, 5:23pm UTC](https://discourse.slicer.org/t/convert-dicom-rtss-to-dicom-segmentation/19738/2 "2021-09-18T17:23:55Z")

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If you install the SlicerRT extension then you can import DICOM RT Structure Set, and if you install Quantitive Reporting extension then you can export it as DICOM Segmentation Object. See [DICOM module documentation](https://slicer.readthedocs.io/en/latest/user_guide/modules/dicom.html) for details.

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**Author:** ![piegou](https://avatars.discourse-cdn.com/v4/letter/p/8e7dd6/32.png) [@piegou](https://discourse.slicer.org/u/piegou)\
**Post date:** [September 20, 2021, 8:21pm UTC](https://discourse.slicer.org/t/convert-dicom-rtss-to-dicom-segmentation/19738/3 "2021-09-20T20:21:09Z")

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I imported a CT scan with its segmentation in RTSS format.  
Despite the installation of the Slicer RT and Quantitative Reporting modules, I cannot find how to export the segmentation in DICOM segmentation format. I saw that it was possible to export it in NIFTI format for example but the viewer that I will use afterwards only allows the DICOM segmentation format.  
I am a beginner with Slicer3D, thank you for answering the first post and I hope this one too.

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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:** [September 23, 2021, 3:00am UTC](https://discourse.slicer.org/t/convert-dicom-rtss-to-dicom-segmentation/19738/4 "2021-09-23T03:00:54Z")

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You need to first load the segmentation into the scene and then [export it to DICOM](https://slicer.readthedocs.io/en/latest/user_guide/modules/dicom.html#export-data-from-the-scene-to-dicom-database). In the “DICOM export” window, choose Select export type → DICOMSegmentation.