# How can I segment crestal area precisely apart from mandible because of its variability?

**URL:** <https://discourse.slicer.org/t/how-can-i-segment-crestal-area-precisely-apart-from-mandible-because-of-its-variability/38242>\
**Category:** SlicerMorph\
**Tags:** segmentation\
**Created:** [September 5, 2024, 3:48pm UTC](https://discourse.slicer.org/t/how-can-i-segment-crestal-area-precisely-apart-from-mandible-because-of-its-variability/38242 "2024-09-05T15:48:13Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![yijie3091](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/yijie3091/32/80324_2.png) [@yijie3091](https://discourse.slicer.org/u/yijie3091)\
**Post date:** [September 5, 2024, 3:48pm UTC](https://discourse.slicer.org/t/how-can-i-segment-crestal-area-precisely-apart-from-mandible-because-of-its-variability/38242/1 "2024-09-05T15:48:13Z")

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Because of the crestal area’s variability,how can I segment it precisely apart from mandible in slicermorph?

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [September 5, 2024, 7:42pm UTC](https://discourse.slicer.org/t/how-can-i-segment-crestal-area-precisely-apart-from-mandible-because-of-its-variability/38242/2 "2024-09-05T19:42:35Z")

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Please share screenshots that are showing the types of challenges you are facing? Also segmentation is a core feature of 3D Slicer, and not part of SlicerMorph extension.

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**Author:** ![yijie3091](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/yijie3091/32/80324_2.png) [@yijie3091](https://discourse.slicer.org/u/yijie3091)\
**Post date:** [September 6, 2024, 10:47am UTC](https://discourse.slicer.org/t/how-can-i-segment-crestal-area-precisely-apart-from-mandible-because-of-its-variability/38242/3 "2024-09-06T10:47:06Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/9/0/909ea74b9bc04ead33cd4063acf577fae068b905.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/8/c/8c1fb17fc563cce88a28e66e97f1faa09f2e1e31.png)

OK,I want to remove this red region.

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [September 6, 2024, 4:35pm UTC](https://discourse.slicer.org/t/how-can-i-segment-crestal-area-precisely-apart-from-mandible-because-of-its-variability/38242/4 "2024-09-06T16:35:12Z")

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I don’t think there is anything automatic to help you remove those regions. You can use a number of effects in the Segment Editor (paint and threshold) to delete them.