# CT scan emptying

**URL:** <https://discourse.slicer.org/t/ct-scan-emptying/25619>\
**Category:** Support\
**Created:** [October 9, 2022, 3:36pm UTC](https://discourse.slicer.org/t/ct-scan-emptying/25619 "2022-10-09T15:36:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ermellina\_di\_bagno](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ermellina_di_bagno/32/16874_2.png) [@ermellina\_di\_bagno](https://discourse.slicer.org/u/ermellina_di_bagno)\
**Post date:** [October 9, 2022, 3:36pm UTC](https://discourse.slicer.org/t/ct-scan-emptying/25619/1 "2022-10-09T15:36:23Z")

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Operating system: MAC OS MOJAVE  
Slicer version: 4.11.2  
Expected behavior:  
Actual behavior:I uploaded a CT scan of a brown bear skull. the CT scan contains only the bone tissues and I need to keep only the external surface of the skull and eliminate all internal contents. how can I do? after loading the dicom I created a segment in the segment editor and used the threshold to give it an appropriate representation but in doing so the internal contents were also reproduced.

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**Author:** ![mau\_igna\_06](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mau_igna_06/32/9056_2.png) [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Post date:** [October 9, 2022, 8:35pm UTC](https://discourse.slicer.org/t/ct-scan-emptying/25619/2 "2022-10-09T20:35:50Z")

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Please install the [WrapSolidify](https://github.com/sebastianandress/Slicer-SurfaceWrapSolidify#readme) effect for the segment editor from the extension manager and try to use it.