# How to get the proper shape from 3d OCT volume rendering

**URL:** <https://discourse.slicer.org/t/how-to-get-the-proper-shape-from-3d-oct-volume-rendering/6475>\
**Category:** Support\
**Tags:** oct\
**Created:** [April 11, 2019, 8:53pm UTC](https://discourse.slicer.org/t/how-to-get-the-proper-shape-from-3d-oct-volume-rendering/6475 "2019-04-11T20:53:01Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sreyankar](https://avatars.discourse-cdn.com/v4/letter/s/4da419/32.png) [@sreyankar](https://discourse.slicer.org/u/sreyankar)\
**Post date:** [April 11, 2019, 8:53pm UTC](https://discourse.slicer.org/t/how-to-get-the-proper-shape-from-3d-oct-volume-rendering/6475/1 "2019-04-11T20:53:01Z")

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Operating system: Mac OS X  
Slicer version: 4.10.1  
Expected behavior: Trying to interactively build a 3d model from a stack of circular OCT images from an airway. The boundaries are not very well defined.  
Actual behavior: In the 3d volume it shows up as a volumetric cylinder, how to make it in the shape I want, i.e. an actual airway?

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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:** [April 4, 2022, 3:17pm UTC](https://discourse.slicer.org/t/how-to-get-the-proper-shape-from-3d-oct-volume-rendering/6475/2 "2022-04-04T15:17:26Z")

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You can reconstruct Cartesian volume from circular OCT images (see discussion [here](https://discourse.slicer.org/t/3d-reconstruction-of-radial-oct-slices/20734/5)) and then you can use Segment Editor to create a 3D model.