# Export segmentation to FEA software

**URL:** <https://discourse.slicer.org/t/export-segmentation-to-fea-software/2893>\
**Category:** Support\
**Created:** [May 23, 2018, 2:51am UTC](https://discourse.slicer.org/t/export-segmentation-to-fea-software/2893 "2018-05-23T02:51:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![saeed\_mouloodi](https://avatars.discourse-cdn.com/v4/letter/s/c68b51/32.png) [@saeed\_mouloodi](https://discourse.slicer.org/u/saeed_mouloodi)\
**Post date:** [May 23, 2018, 2:51am UTC](https://discourse.slicer.org/t/export-segmentation-to-fea-software/2893/1 "2018-05-23T02:51:08Z")

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Dear Andras,

Hello again and thanks for your previous instructions. I could do what I aimed to do.

Currently, I need a 3D model of the long bone so that I can import into a CAD and eventually into a FEA.  
In the Segment Editor module, after applying threshold, Island, etc, the long bone is selected with highlighting the slices (the actual cross sections of the bone). Afterwards, I hit the export/model in the Segmentations module and then I import the generated file into a CAD (such as CATIA). However, only the outer and inner surface of the long bone is shown in CAD(without the cross sections). In the 3D slicer, it seems that a 3D model is generated, maybe it is due to exporting as an STL file?

Any help you provide is highly appreciated.

Saeed

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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:** [May 23, 2018, 4:50am UTC](https://discourse.slicer.org/t/export-segmentation-to-fea-software/2893/2 "2018-05-23T04:50:16Z")

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See this discussion about challenges regarding using surface meshes in CAD software: [From mesh to surface](https://discourse.slicer.org/t/from-mesh-to-surface/1626/22)