# Create a set of planar contours from IRM images

**URL:** <https://discourse.slicer.org/t/create-a-set-of-planar-contours-from-irm-images/10084>\
**Category:** Development\
**Tags:** segmentation, extensions-manager, dicom\
**Created:** [February 3, 2020, 2:01pm UTC](https://discourse.slicer.org/t/create-a-set-of-planar-contours-from-irm-images/10084 "2020-02-03T14:01:58Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [February 4, 2020, 4:15pm UTC](https://discourse.slicer.org/t/create-a-set-of-planar-contours-from-irm-images/10084/3 "2020-02-04T16:15:35Z")

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> [@loubna](#):
>
> I may be need to install the slicerRt extension

Your hunch is right, SlicerRT has this function. It’s not that trivial, so it’s good you asked. Currently there is no built-in conversion to planar contours in Segmentations, but it is possible to do via DICOM RTSS export. Make sure you have a valid patient and study in the Data module, and have the master volume and your segmentation under the study. Right-click study, choose Export to DICOM, then make sure RT is selected as export type. The image will be re-exported (see details [here](https://discourse.slicer.org/t/export-rtstruct-referencing-original-volume/9771)), but you will have an RTSS series. Load it in Slicer, and then you’ll have the planar contours. Let me know how it goes.

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