# How to use "split volume" (SegmentEditorExtraEffects Effect)

**URL:** <https://discourse.slicer.org/t/how-to-use-split-volume-segmenteditorextraeffects-effect/32874>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [November 17, 2023, 11:55am UTC](https://discourse.slicer.org/t/how-to-use-split-volume-segmenteditorextraeffects-effect/32874 "2023-11-17T11:55:47Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Lara](https://avatars.discourse-cdn.com/v4/letter/l/e274bd/32.png) [@Lara](https://discourse.slicer.org/u/Lara)\
**Post date:** [November 17, 2023, 11:55am UTC](https://discourse.slicer.org/t/how-to-use-split-volume-segmenteditorextraeffects-effect/32874/1 "2023-11-17T11:55:47Z")

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I am a biomedical engineering student and I’m doing a project using 3D Slicer. I downloaded the extension SegmentEditorExtraEffects and I need to use the tool “split volume” to isolate the jaw from the rest of the skull, but I can’t make it work. Can anyone make a step by step tutorial on how to use this tool to split one segmentation into two different segments?

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [November 17, 2023, 11:26pm UTC](https://discourse.slicer.org/t/how-to-use-split-volume-segmenteditorextraeffects-effect/32874/2 "2023-11-17T23:26:39Z")

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> [@Lara](#):
>
> split one segmentation into two different segments

Split volume helps you create subvolumes of the original image by saving the image contents of each segment to a different volume. It doesn’t split a segmentation into two segments.

You can already do that by using the existing tools within Slicer and a little bit careful masking.

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**Author:** ![Lara](https://avatars.discourse-cdn.com/v4/letter/l/e274bd/32.png) [@Lara](https://discourse.slicer.org/u/Lara)\
**Post date:** [November 20, 2023, 11:55am UTC](https://discourse.slicer.org/t/how-to-use-split-volume-segmenteditorextraeffects-effect/32874/3 "2023-11-20T11:55:01Z")

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Thank you for clarifying what Split Volume actually does. I still need to learn how to use it. Could you explain how to create the mandible subvolume starting from the skull volume using Split Volume? I could really use a step-by-step guide but I can’t find it anywhere

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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 20, 2023, 5:07pm UTC](https://discourse.slicer.org/t/how-to-use-split-volume-segmenteditorextraeffects-effect/32874/4 "2023-11-20T17:07:22Z")

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You can split segments using Scissors effect as shown in [this segmentation recipe](https://lassoan.github.io/SlicerSegmentationRecipes/Craniotomy/).

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**Author:** ![Lara](https://avatars.discourse-cdn.com/v4/letter/l/e274bd/32.png) [@Lara](https://discourse.slicer.org/u/Lara)\
**Post date:** [November 21, 2023, 10:32am UTC](https://discourse.slicer.org/t/how-to-use-split-volume-segmenteditorextraeffects-effect/32874/5 "2023-11-21T10:32:56Z")

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Thank you, I’ve read that recipe already and I managed to split the segments using different tools. Now my professor wants me to learn how to use Split Volume instead, so if anyone could write a step-by-step tutorial I would be very grateful.

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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 21, 2023, 11:55am UTC](https://discourse.slicer.org/t/how-to-use-split-volume-segmenteditorextraeffects-effect/32874/6 "2023-11-21T11:55:40Z")

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One your have created the two segments by following the recipe, you can use Split Volume effect to create two volumes from it.