# 4D Data Registration To Generate Motion Equations for CFD Programs

**URL:** <https://discourse.slicer.org/t/4d-data-registration-to-generate-motion-equations-for-cfd-programs/4664>\
**Category:** Support\
**Tags:** registration\
**Created:** [November 6, 2018, 10:14pm UTC](https://discourse.slicer.org/t/4d-data-registration-to-generate-motion-equations-for-cfd-programs/4664 "2018-11-06T22:14:02Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![aginn](https://avatars.discourse-cdn.com/v4/letter/a/dfb087/32.png) [@aginn](https://discourse.slicer.org/u/aginn)\
**Post date:** [November 6, 2018, 10:14pm UTC](https://discourse.slicer.org/t/4d-data-registration-to-generate-motion-equations-for-cfd-programs/4664/1 "2018-11-06T22:14:02Z")

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Hello everyone,

I need to model the deformation of a 4D MRI dataset for use within CFD software. I will need equations that track node position over time.

Can 3D slicer’s registration capabilities achieve this?

Thanks.

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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:** [November 6, 2018, 11:24pm UTC](https://discourse.slicer.org/t/4d-data-registration-to-generate-motion-equations-for-cfd-programs/4664/2 "2018-11-06T23:24:52Z")

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[Sequence registration extension](https://github.com/moselhy/SlicerSequenceRegistration) can compute displacement for every voxel for every time point.

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**Author:** ![aginn](https://avatars.discourse-cdn.com/v4/letter/a/dfb087/32.png) [@aginn](https://discourse.slicer.org/u/aginn)\
**Post date:** [November 7, 2018, 3:34pm UTC](https://discourse.slicer.org/t/4d-data-registration-to-generate-motion-equations-for-cfd-programs/4664/3 "2018-11-07T15:34:07Z")

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I was able to find the “Sequence Registration” extension on the slicer app store (I am using a Mac). However, I could not find the “Elastix” app, which is required for proper function.

Has this app changed or been renamed?

Thank you!

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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:** [November 7, 2018, 11:20pm UTC](https://discourse.slicer.org/t/4d-data-registration-to-generate-motion-equations-for-cfd-programs/4664/4 "2018-11-07T23:20:31Z")

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You need to install SlicerElastix extension. On Mac, you may need to [download Elastix application](http://elastix.isi.uu.nl/download.php) and set its path in Slicer in “General registration (Elastix)” extension.