# Extract OAR contour matrix from contoured 3D CT-scan images

**URL:** <https://discourse.slicer.org/t/extract-oar-contour-matrix-from-contoured-3d-ct-scan-images/33598>\
**Category:** Support\
**Tags:** segmentation, dicom\
**Created:** [January 3, 2024, 12:08pm UTC](https://discourse.slicer.org/t/extract-oar-contour-matrix-from-contoured-3d-ct-scan-images/33598 "2024-01-03T12:08:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mSanchita](https://avatars.discourse-cdn.com/v4/letter/m/5daacb/32.png) [@mSanchita](https://discourse.slicer.org/u/mSanchita)\
**Post date:** [January 3, 2024, 12:08pm UTC](https://discourse.slicer.org/t/extract-oar-contour-matrix-from-contoured-3d-ct-scan-images/33598/1 "2024-01-03T12:08:08Z")

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Dear community,

I am new to 3D Slicer, and I have a complete RT plan (CT (a set of image slices), RTPLAN, RTDOSE, RTSTRUCT) and I wanted to extract OAR contour matrix from the contoured 3D CT-scan images. Can I extract it using 3D Slicer, and if so, what steps I need to follow to extract that matrix for each OAR?

Thank you so much!!

Best regards,  
Sanchita