# Curves plane without straightening

**URL:** <https://discourse.slicer.org/t/curves-plane-without-straightening/27926>\
**Category:** Support\
**Created:** [February 20, 2023, 12:43pm UTC](https://discourse.slicer.org/t/curves-plane-without-straightening/27926 "2023-02-20T12:43:11Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![mohammed\_alshakhas](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mohammed_alshakhas/32/10025_2.png) [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Post date:** [February 20, 2023, 12:43pm UTC](https://discourse.slicer.org/t/curves-plane-without-straightening/27926/1 "2023-02-20T12:43:11Z")

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Is it possible to create a curved plane without being straightened ?

Thanks

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**Author:** ![RafaelPalomar](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/rafaelpalomar/32/1436_2.png) [@RafaelPalomar](https://discourse.slicer.org/u/RafaelPalomar)\
**Post date:** [February 21, 2023, 5:50am UTC](https://discourse.slicer.org/t/curves-plane-without-straightening/27926/2 "2023-02-21T05:50:45Z")

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In [Slicer-Liver](https://github.com/ALive-research/Slicer-Liver) we use Bezier surfaces, which can be defined by sets of control points.

Bezier surfaces can be initialized as planes if all control points lie on a plane:

 ![Slicer-Liver_screenshot_01](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/6/9/69bb59f086f4c300c4064b0a7675deec52f38954.jpeg)

and can take any arbitrary form (depending of the number of control points):

 ![Slicer-Liver_screenshot_04](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/8/5888b115519ff05f08fd18ffefce59617368e9de.png)

There is more information in our repository [GitHub - ALive-research/Slicer-Liver: 3D Slicer extension for liver analysis and therapy planning](https://github.com/ALive-research/Slicer-Liver) and our Project Week page [NA-MIC Project Weeks | Website for NA-MIC Project Weeks](https://projectweek.na-mic.org/PW38_2023_GranCanaria/Projects/SlicerLiver/)

@mohammed_alshakhas, what is your application? Would this be of any help?

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**Author:** ![mohammed\_alshakhas](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mohammed_alshakhas/32/10025_2.png) [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Post date:** [February 22, 2023, 9:04am UTC](https://discourse.slicer.org/t/curves-plane-without-straightening/27926/3 "2023-02-22T09:04:17Z")

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Looks very interesting , I tried the module but couldn’t figure out where to start

I’m planning to use it for visualizing mandible .  
Mandible lesions or certain anatomy visualization is better seen in curved planes instead of looking at slice a time .

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**Author:** ![RafaelPalomar](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/rafaelpalomar/32/1436_2.png) [@RafaelPalomar](https://discourse.slicer.org/u/RafaelPalomar)\
**Post date:** [February 22, 2023, 1:06pm UTC](https://discourse.slicer.org/t/curves-plane-without-straightening/27926/4 "2023-02-22T13:06:07Z")

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There is documentation in here: [GitHub - ALive-research/Slicer-Liver: 3D Slicer extension for liver analysis and therapy planning](https://github.com/ALive-research/Slicer-Liver)

And also a video tutorial here: [Slicer-liver tutorial - YouTube](https://www.youtube.com/watch?v=oRu624mtQZE)

For your specific application, do you mean that you would like to slice the image volume using these curved geometries? For Slicer-Liver we don’t map the volume information in the surface or change the slice information.

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**Author:** ![johny723](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@johny723](https://discourse.slicer.org/u/johny723)\
**Post date:** [January 3, 2024, 9:23pm UTC](https://discourse.slicer.org/t/curves-plane-without-straightening/27926/5 "2024-01-03T21:23:54Z")

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Hi. I need to create a bezier surface. Is there any video tutorial showing how to actually do it? How do I make my own set of control points in an arbitrary organ and then create a bezier surface ? 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:** [January 4, 2024, 4:28am UTC](https://discourse.slicer.org/t/curves-plane-without-straightening/27926/6 "2024-01-04T04:28:21Z")

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Have you tried following the video tutorial described in the post above?  
You can also try markup provided by SurfaceMarkups extension.