# Virtual straightening of the spine based on CT (or MRI) images

**URL:** <https://discourse.slicer.org/t/virtual-straightening-of-the-spine-based-on-ct-or-mri-images/38360>\
**Category:** Development\
**Tags:** registration\
**Created:** [September 13, 2024, 3:39am UTC](https://discourse.slicer.org/t/virtual-straightening-of-the-spine-based-on-ct-or-mri-images/38360 "2024-09-13T03:39:02Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![medmax](https://avatars.discourse-cdn.com/v4/letter/m/48db29/32.png) [@medmax](https://discourse.slicer.org/u/medmax)\
**Post date:** [September 13, 2024, 3:39am UTC](https://discourse.slicer.org/t/virtual-straightening-of-the-spine-based-on-ct-or-mri-images/38360/1 "2024-09-13T03:39:02Z")

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New to this forum, but not to Slicer. Impressed by the diversity of applications  
I am looking for a software package capable of “redressing” the (CT) image of the spine in such a way that it follows a straight axis. I think such software was part of (some) radiology workstations, but I can’t put my hand on it. I was thinking of an elastic coregistration with a model of a straight spine (possibly with fiducial markers, like reference points). Any help?? Thank you WJP medmax

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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:** [September 13, 2024, 3:56am UTC](https://discourse.slicer.org/t/virtual-straightening-of-the-spine-based-on-ct-or-mri-images/38360/2 "2024-09-13T03:56:51Z")

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This straightening operation is called “Curved planar reformat” and it is available in the [“Curved planar reformat” module in Sandbox extension](https://github.com/PerkLab/SlicerSandbox?tab=readme-ov-file#curved-planar-reformat).

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**Author:** ![medmax](https://avatars.discourse-cdn.com/v4/letter/m/48db29/32.png) [@medmax](https://discourse.slicer.org/u/medmax)\
**Post date:** [September 13, 2024, 9:06am UTC](https://discourse.slicer.org/t/virtual-straightening-of-the-spine-based-on-ct-or-mri-images/38360/3 "2024-09-13T09:06:27Z")

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Thank you ++  
I expect you are referring to the Sandbox extension of Slicer? I must check whether I have this extension on my version  
Have a good day  
WJP

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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:** [September 13, 2024, 11:54am UTC](https://discourse.slicer.org/t/virtual-straightening-of-the-spine-based-on-ct-or-mri-images/38360/4 "2024-09-13T11:54:36Z")

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Yes, you can install the Sandbox extension from the Extensions Manager. It is available for current version of Slicer on all operating systems.

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**Author:** ![medmax](https://avatars.discourse-cdn.com/v4/letter/m/48db29/32.png) [@medmax](https://discourse.slicer.org/u/medmax)\
**Post date:** [September 13, 2024, 4:02pm UTC](https://discourse.slicer.org/t/virtual-straightening-of-the-spine-based-on-ct-or-mri-images/38360/5 "2024-09-13T16:02:51Z")

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Thank you. I’ll check this WE  
Have a good day  
WJP