# Vertebral Foramen Segmentation with Fill between Slices

**URL:** <https://discourse.slicer.org/t/vertebral-foramen-segmentation-with-fill-between-slices/25994>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [November 1, 2022, 1:39am UTC](https://discourse.slicer.org/t/vertebral-foramen-segmentation-with-fill-between-slices/25994 "2022-11-01T01:39:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![dav](https://avatars.discourse-cdn.com/v4/letter/d/977dab/32.png) [@dav](https://discourse.slicer.org/u/dav)\
**Post date:** [November 1, 2022, 1:39am UTC](https://discourse.slicer.org/t/vertebral-foramen-segmentation-with-fill-between-slices/25994/1 "2022-11-01T01:39:43Z")

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Trying to segment the vertebral space in this image where I’ve already segmented out the lumbar spine.

I found that fill between slices works moderately well, (see image)

![fill_btwn_slices1](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/9/e9425197f13b10ad4fc2da31fbefd412dc3b472d.png)

however upon initializing you can see how the rest of the segments grow, and I can’t select islands to remove this growth and I don’t know how to lock those segments so only the vertebral space grows.

Unfortunately I can’t always segment out the space as it’s not always straight (seen here)

![fill_btwn_slices2](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/b/1/b12a54ef8e8b0b2a31ec69624f75a3e1b3419786.png)

and the CT data isn’t the best resolution for segmenting out the spinal column as some other form of help here.

- How can I fill slices on just one segmentation without influencing the others?
- Or what other tricks can I use to get this segmentation nicely?