# Segmentation editor: Filling in the gaps of Threshold

**URL:** <https://discourse.slicer.org/t/segmentation-editor-filling-in-the-gaps-of-threshold/18370>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [June 28, 2021, 1:30pm UTC](https://discourse.slicer.org/t/segmentation-editor-filling-in-the-gaps-of-threshold/18370 "2021-06-28T13:30:23Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![reddington.15](https://avatars.discourse-cdn.com/v4/letter/r/34f0e0/32.png) [@reddington.15](https://discourse.slicer.org/u/reddington.15)\
**Post date:** [June 28, 2021, 1:30pm UTC](https://discourse.slicer.org/t/segmentation-editor-filling-in-the-gaps-of-threshold/18370/1 "2021-06-28T13:30:23Z")

</div>

Hello,  
I am working on isolating the pelvis from the body and it is taking me some time, so I was curious if there was a faster way in filling in the gaps in each slice of the CT scan after thresholding. I am manually going through slice by slice of the pelvis and using the paint tool to shade in the parts that thresholding didn’t get. However, I feel like this is too time consuming and there has to be an easier way.  
I hope my question makes sense and that I hear back soon.

Thanks,  
Jordan

---

<div class="post-metadata">

**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:** [June 28, 2021, 2:17pm UTC](https://discourse.slicer.org/t/segmentation-editor-filling-in-the-gaps-of-threshold/18370/2 "2021-06-28T14:17:13Z")

</div>

[SurfaceWrapSolidify extenstion](https://github.com/sebastianandress/Slicer-SurfaceWrapSolidify#surface-wrap-solidify) is developed for exactly this purpose. Let us know if you need any help with it.

---

<div class="post-metadata">

**Author:** ![reddington.15](https://avatars.discourse-cdn.com/v4/letter/r/34f0e0/32.png) [@reddington.15](https://discourse.slicer.org/u/reddington.15)\
**Post date:** [June 28, 2021, 2:29pm UTC](https://discourse.slicer.org/t/segmentation-editor-filling-in-the-gaps-of-threshold/18370/3 "2021-06-28T14:29:10Z")

</div>

Hi Andras,

I actually did see this when I was doing research on how to solve this problem. I already have that extension downloaded and when I tried using it I could only create a shell. Is there a way to fill the shell in so that it is solid all the way through and not hollow?

Thank you,  
Jordan

---

<div class="post-metadata">

**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:** [June 28, 2021, 2:40pm UTC](https://discourse.slicer.org/t/segmentation-editor-filling-in-the-gaps-of-threshold/18370/4 "2021-06-28T14:40:15Z")

</div>

Unless you choose the “Create shell” option, the module generates a solid object.

If the tool does not do what you expect then it would be great if you could attach a screenshot and mark where you expect to see something different.

---

<div class="post-metadata">

**Author:** ![reddington.15](https://avatars.discourse-cdn.com/v4/letter/r/34f0e0/32.png) [@reddington.15](https://discourse.slicer.org/u/reddington.15)\
**Post date:** [June 28, 2021, 3:33pm UTC](https://discourse.slicer.org/t/segmentation-editor-filling-in-the-gaps-of-threshold/18370/5 "2021-06-28T15:33:44Z")

</div>

I just figured it out!

Thank you so much for your help.