# Make Slicers perpendicular to other

**URL:** <https://discourse.slicer.org/t/make-slicers-perpendicular-to-other/15518>\
**Category:** Support\
**Created:** [January 14, 2021, 6:42am UTC](https://discourse.slicer.org/t/make-slicers-perpendicular-to-other/15518 "2021-01-14T06:42:37Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![manjula](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/manjula/32/80981_2.png) [@manjula](https://discourse.slicer.org/u/manjula)\
**Post date:** [January 14, 2021, 6:42am UTC](https://discourse.slicer.org/t/make-slicers-perpendicular-to-other/15518/1 "2021-01-14T06:42:37Z")

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After reformating one slice is there a way to make the other 2 slicer exactly perpendicular to the original along the other two axes?

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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:** [January 14, 2021, 2:09pm UTC](https://discourse.slicer.org/t/make-slicers-perpendicular-to-other/15518/2 "2021-01-14T14:09:34Z")

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I would recommend to rotate slice views by keeping them orthogonal. A few options for that:

- Option A: Rotate slices using Ctrl+Alt+Left-click-and-drag. This rotates slices so that they remain orthogonal.
- Option B: Rotate using transform: Install SlicerIGT extension, create a transform, use that in Volume Reslice Driver module to reslice the volume (choose modes: Inplane, Inplane 90, Transverse). You can edit the transform using sliders in Transforms module, or other modules (for example, if you want to reslice along a curve then you can use Endoscopy module or CrossSectionAnalysis module (in SlicerVMTK).

What would you like to achieve? Trace a nerve or vessel? Or review/segment a rotationally symmetric object? There are specific modules for these.

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**Author:** ![manjula](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/manjula/32/80981_2.png) [@manjula](https://discourse.slicer.org/u/manjula)\
**Post date:** [January 14, 2021, 5:53pm UTC](https://discourse.slicer.org/t/make-slicers-perpendicular-to-other/15518/3 "2021-01-14T17:53:15Z")

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Dear Prof Lasso,

My use case is not specific but generic. I find the “Fit slice plane to markup fiducials” script very useful and use it to orient slices.

But when I use the script I would like to have the other two planes (green and yellow) to reorient them self relative to the red slice. (i.e keep the perpendicular relationship like in the original)

 ![Screenshot from 2021-01-14 18-38-11](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/4/342ece36f2e3659c834f7747262a73a3ffdf054e.png)

Is there a way to make this happen maybe straight from the script ?

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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:** [January 14, 2021, 6:59pm UTC](https://discourse.slicer.org/t/make-slicers-perpendicular-to-other/15518/4 "2021-01-14T18:59:57Z")

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After you set the computed SliceToRAS transform into one slice, you can apply 90-degree rotations to to this transform and apply that to the two other slice views. Or, do not set the computer transform directly as SliceToRAS, but set it into a transform node that controls all slices via Volume Reslice Driver.