# 2D Segmentation possible?

**URL:** <https://discourse.slicer.org/t/2d-segmentation-possible/33743>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [January 11, 2024, 10:32pm UTC](https://discourse.slicer.org/t/2d-segmentation-possible/33743 "2024-01-11T22:32:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![doctornew](https://avatars.discourse-cdn.com/v4/letter/d/0ea827/32.png) [@doctornew](https://discourse.slicer.org/u/doctornew)\
**Post date:** [January 11, 2024, 10:32pm UTC](https://discourse.slicer.org/t/2d-segmentation-possible/33743/1 "2024-01-11T22:32:24Z")

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Hello, a few days ago I downloaded slicer with the plan to measure the skeletal muscle index of patients. The measurement is based on a 2D segmentation. I’ve already played around with 3D segmentation, but so far I haven’t found a way to segment in 2D. Is this even possible? If so, how can I do this? Thank you for your help in advance!

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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 11, 2024, 10:36pm UTC](https://discourse.slicer.org/t/2d-segmentation-possible/33743/2 "2024-01-11T22:36:17Z")

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Most segmentation tools work on 2D (single-slice 3D) images, but “Grow from seeds effect” and maybe a few more do not. Let us know if you have any specific questions (how to do something, explain why something behaves as it does, etc.).