# Elastix registration and a segmentation created with Segment Editor

**URL:** <https://discourse.slicer.org/t/elastix-registration-and-a-segmentation-created-with-segment-editor/23116>\
**Category:** Support\
**Created:** [April 25, 2022, 4:52pm UTC](https://discourse.slicer.org/t/elastix-registration-and-a-segmentation-created-with-segment-editor/23116 "2022-04-25T16:52:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Gonzalo\_Rojas\_Costa](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/gonzalo_rojas_costa/32/5259_2.png) [@Gonzalo\_Rojas\_Costa](https://discourse.slicer.org/u/Gonzalo_Rojas_Costa)\
**Post date:** [April 25, 2022, 4:52pm UTC](https://discourse.slicer.org/t/elastix-registration-and-a-segmentation-created-with-segment-editor/23116/1 "2022-04-25T16:52:49Z")

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Hi:

I co-registered between two FLAIR MRIs of the same patient using “General Registration (elastix)”. I want to apply the obtained transformation to a segmentation made with the Segment Editor based on one of the two images. How can I do that?

Sincerely,

Gonzalo Rojas Costa

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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:** [April 25, 2022, 7:27pm UTC](https://discourse.slicer.org/t/elastix-registration-and-a-segmentation-created-with-segment-editor/23116/2 "2022-04-25T19:27:03Z")

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You can apply the transform to a node as described [here](https://slicer.readthedocs.io/en/latest/user_guide/modules/transforms.html#apply-transform-to-a-node). If you want to persistently modify the segmentation then you need to [harden the applied transform](https://slicer.readthedocs.io/en/latest/user_guide/modules/transforms.html#harden-transform-on-a-node) on the node.