# How can I convert an rtstruct to an nrrd

**URL:** <https://discourse.slicer.org/t/how-can-i-convert-an-rtstruct-to-an-nrrd/539>\
**Category:** Support\
**Created:** [June 20, 2017, 1:48pm UTC](https://discourse.slicer.org/t/how-can-i-convert-an-rtstruct-to-an-nrrd/539 "2017-06-20T13:48:27Z")\
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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:** [June 20, 2017, 2:19pm UTC](https://discourse.slicer.org/t/how-can-i-convert-an-rtstruct-to-an-nrrd/539/2 "2017-06-20T14:19:34Z")

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In Segmentations module change Master representation to binary labelmap (click `Make master` button in the `Binary labelmap` row in Representations section) then save the scene. Structure sets may overlap, therefore the nrrd file will be a 4-dimensional volume, each segment is stored in a separate 3D subvolume.

Use latest nightly build, it’s stable and contains many fixes and improvements.

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