# issues with Elastix tool

**URL:** <https://discourse.slicer.org/t/issues-with-elastix-tool/46213>\
**Category:** Support\
**Created:** [February 18, 2026, 5:25pm UTC](https://discourse.slicer.org/t/issues-with-elastix-tool/46213 "2026-02-18T17:25:41Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Martina\_Ma](https://avatars.discourse-cdn.com/v4/letter/m/779978/32.png) [@Martina\_Ma](https://discourse.slicer.org/u/Martina_Ma)\
**Post date:** [February 18, 2026, 5:25pm UTC](https://discourse.slicer.org/t/issues-with-elastix-tool/46213/1 "2026-02-18T17:25:41Z")

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Operating system: Windows 11 PRO  
Slicer version: 5.10.0  
Hi everyone,

I’m trying to use Elastix tool to register a CT scan with a CBCT one but the tool doesn’t work anymore and gives error. I already resampled the volume size of both the scans.

Has anyone had a similar problem?

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**Author:** ![drnoorfatima](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/drnoorfatima/32/81980_2.png) [@drnoorfatima](https://discourse.slicer.org/u/drnoorfatima)\
**Post date:** [February 19, 2026, 2:28am UTC](https://discourse.slicer.org/t/issues-with-elastix-tool/46213/2 "2026-02-19T02:28:56Z")

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Hi,

Elastix errors on CT-CBCT registration are usually related to one of a few things: memory issues with large volumes, parameter file incompatibility with Slicer 5.10, or field of view mismatches between the two acquisitions.

What’s the specific error message you’re getting? That would help narrow down what’s happening.

Also, CT and CBCT registration can be tricky even when Elastix runs without errors, the intensity ranges and image characteristics are quite different, so the registration quality depends a lot on the right parameter settings for your specific use case.

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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:** [February 20, 2026, 12:31am UTC](https://discourse.slicer.org/t/issues-with-elastix-tool/46213/3 "2026-02-20T00:31:43Z")

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@Martina_Ma Does it work if you use the `MRBrainTumor1` and `MRBrainTumor2` data sets as fixed and moving volume, you choose a new volume as output volume, and you use the default registration settings?

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**Author:** ![Martina\_Ma](https://avatars.discourse-cdn.com/v4/letter/m/779978/32.png) [@Martina\_Ma](https://discourse.slicer.org/u/Martina_Ma)\
**Post date:** [February 20, 2026, 9:48am UTC](https://discourse.slicer.org/t/issues-with-elastix-tool/46213/4 "2026-02-20T09:48:55Z")

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Hi [@Internationalization](https://discourse.slicer.org/groups/internationalization) and @drnoorfatima,

thank you both for the answers. I think I solved the issue.

Thanks a million.