# Segment Skeletal thorax (Ribs, Thoracic spine and sternum)

**URL:** <https://discourse.slicer.org/t/segment-skeletal-thorax-ribs-thoracic-spine-and-sternum/16600>\
**Category:** Support\
**Created:** [March 17, 2021, 6:20pm UTC](https://discourse.slicer.org/t/segment-skeletal-thorax-ribs-thoracic-spine-and-sternum/16600 "2021-03-17T18:20:59Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![rbumm](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/rbumm/32/9404_2.png) [@rbumm](https://discourse.slicer.org/u/rbumm)\
**Post date:** [March 19, 2021, 2:38pm UTC](https://discourse.slicer.org/t/segment-skeletal-thorax-ribs-thoracic-spine-and-sternum/16600/6 "2021-03-19T14:38:10Z")

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You will find it after installing the “Segment Editor Extra Effects” extension from the extensions manager.

More information on the effect see here: [New Segment Editor effect: Local threshold - #7 by sfglio](https://discourse.slicer.org/t/new-segment-editor-effect-local-threshold/9233/7)

It is important to remember that - after selection of a “bone” threshold - you need to left click into one of the slices (onto the bone) to add to the new segmentation.

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_[View the full topic](https://discourse.slicer.org/t/segment-skeletal-thorax-ribs-thoracic-spine-and-sternum/16600)._