# Segmentation changes when applying Treshold

**URL:** https://discourse.slicer.org/t/segmentation-changes-when-applying-treshold/14603
**Category:** Support
**Created:** [November 14, 2020, 6:25pm UTC](https://discourse.slicer.org/t/segmentation-changes-when-applying-treshold/14603 "2020-11-14T18:25:13Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Papis](https://avatars.discourse-cdn.com/v4/letter/p/f1d935/32.png) [@Papis](https://discourse.slicer.org/u/Papis)
#### Post date: [November 14, 2020, 6:25pm UTC](https://discourse.slicer.org/t/segmentation-changes-when-applying-treshold/14603/1 "2020-11-14T18:25:13Z")

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Operating system: MacOS Mojave 10.14.6  
Slicer version: 4.11.20200930  
Expected behavior: Save segmented area within chosen threshold  
Actual behavior: Cuts off majority of segmented area when applying threshold leaving irrelevant shape

Hi!

I have imported a DICOM-file through a CD-drive, rendered the volume visible in the purple box, added a new segment under segment editor, changed the threshold so only relevant structures are shown and when i click apply I’m not left with what I had highlighted but some other shape instead? Anyone have a clue what I’m doing wrong?

See attached photos. My intention is to convert the DICOM into .stl and be able to work with it in Blender…

Thanks /S

 ![Skärmavbild 2020-11-14 kl. 16.48.25](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/1/9/1993d4729ec8beee65680f11b8c112cb9e8acd4c.jpeg) ![Skärmavbild 2020-11-14 kl. 16.48.56](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/5/e5dc522ec5a1b1b2b5fe49e5731dad530412a6a1.jpeg) ![Skärmavbild 2020-11-14 kl. 16.49.19](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/0/a/0aa78dfe82fde04e9b3cc16ac1a2f3361c67a81d.jpeg) ![Skärmavbild 2020-11-14 kl. 16.50.15](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/d/0/d028eb63e2dda2c9859bed2644eb0cc105224ba3.jpeg) ![Skärmavbild 2020-11-14 kl. 16.50.34](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/f/a/fa7d985335204ccc7819193a3cb13b645831d97a.jpeg)

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<div class="post-metadata">

### Author: ![Papis](https://avatars.discourse-cdn.com/v4/letter/p/f1d935/32.png) [@Papis](https://discourse.slicer.org/u/Papis)
#### Post date: [November 15, 2020, 8:54am UTC](https://discourse.slicer.org/t/segmentation-changes-when-applying-treshold/14603/2 "2020-11-15T08:54:53Z")

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Ok I managed to solve this one myself. Problem was the segmentation geometry and when that was changed to desirable dimensions so was the segmentation upon applying.

All the best / S