# Medical CT image alignment/registration

**URL:** <https://discourse.julialang.org/t/medical-ct-image-alignment-registration/91187>\
**Category:** Offtopic\
**Created:** [December 3, 2022, 6:45pm UTC](https://discourse.julialang.org/t/medical-ct-image-alignment-registration/91187 "2022-12-03T18:45:10Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![goretkin](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/goretkin/32/167_2.png) [@goretkin](https://discourse.julialang.org/u/goretkin)\
**Post date:** [December 3, 2022, 6:45pm UTC](https://discourse.julialang.org/t/medical-ct-image-alignment-registration/91187/1 "2022-12-03T18:45:10Z")

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I have two DICOM images from two different [CBCT](https://en.wikipedia.org/wiki/Cone_beam_computed_tomography) scanners of the same dental anatomy. I can open these images in [Horos](https://horosproject.org/).

How can I align/register these two images to each other using free (in any sense) software?

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**Author:** ![stillyslalom](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stillyslalom/32/45687_2.png) [@stillyslalom](https://discourse.julialang.org/u/stillyslalom)\
**Post date:** [December 6, 2022, 9:35pm UTC](https://discourse.julialang.org/t/medical-ct-image-alignment-registration/91187/2 "2022-12-06T21:35:11Z")

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Hard to make specific recommendations without looking at the images, but OpenCV has a number of image registration algorithms (and a Julia binding, iirc?) [Image alignment and registration with OpenCV - PyImageSearch](https://pyimagesearch.com/2020/08/31/image-alignment-and-registration-with-opencv/)

There’s also ImageFeatures.jl alongside ImageTransformations.jl for registering and aligning in pure Julia.

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**Author:** ![goretkin](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/goretkin/32/167_2.png) [@goretkin](https://discourse.julialang.org/u/goretkin)\
**Post date:** [January 13, 2023, 6:53pm UTC](https://discourse.julialang.org/t/medical-ct-image-alignment-registration/91187/3 "2023-01-13T18:53:37Z")

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3D Slicer is the tool to use!