# Merging volumes - what to do after landmark registration

**URL:** <https://discourse.slicer.org/t/merging-volumes-what-to-do-after-landmark-registration/2580>\
**Category:** Support\
**Created:** [April 13, 2018, 9:24am UTC](https://discourse.slicer.org/t/merging-volumes-what-to-do-after-landmark-registration/2580 "2018-04-13T09:24:41Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![katharina\_hecker](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/katharina_hecker/32/3431_2.png) [@katharina\_hecker](https://discourse.slicer.org/u/katharina_hecker)\
**Post date:** [April 13, 2018, 9:24am UTC](https://discourse.slicer.org/t/merging-volumes-what-to-do-after-landmark-registration/2580/1 "2018-04-13T09:24:41Z")

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I wanted to integrate one volume into another one (at a certain position: That is why I was using Landmark registration to align both volumes. It also worked as far as I know. But now I have the problem that When I want to segment the ‘transformed outcome volume’ I can´t see an integration of the first into the second… Am I using the wrong tool for integration at a certain position?  
Thanks for your help!

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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 13, 2018, 1:11pm UTC](https://discourse.slicer.org/t/merging-volumes-what-to-do-after-landmark-registration/2580/2 "2018-04-13T13:11:49Z")

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> [@katharina\_hecker](#):
>
> It also worked as far as I know

What did you see? Can you post a screenshot before and after registration? Have you applied the computed transform to the volume? (you can apply a transform using Transforms module; or in Data module’s Transform hierarchy tab, drag-and-drop volume under the transform)

You can find several registration tutorials that use Fiducial registration wizard module, among [SlicerIGT tutorials](http://www.slicerigt.org/wp/user-tutorial/).