# 3D model of only the outer surface of a bone+ 3D model of a bone

**URL:** <https://discourse.slicer.org/t/3d-model-of-only-the-outer-surface-of-a-bone-3d-model-of-a-bone/2714>\
**Category:** Support\
**Tags:** faq\
**Created:** [April 27, 2018, 2:08am UTC](https://discourse.slicer.org/t/3d-model-of-only-the-outer-surface-of-a-bone-3d-model-of-a-bone/2714 "2018-04-27T02:08:05Z")\
**Posts on this page:** 1\
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**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:** [April 27, 2018, 3:41am UTC](https://discourse.slicer.org/t/3d-model-of-only-the-outer-surface-of-a-bone-3d-model-of-a-bone/2714/2 "2018-04-27T03:41:29Z")

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If the image quality is good enough then thresholding, smoothing, and inverted island removal may produce good enough results. See detailed description here: [2D/3D fill tool](https://discourse.slicer.org/t/2d-3d-fill-tool/2682)

If image quality is very low and/or bone density is low then you may need to use Grow from seeds effect (growing bone from seed regions), as described here: [Bone segmentation to create 3D-printable STL](https://discourse.slicer.org/t/bone-segmentation-to-create-3d-printable-stl/960/15)

Exporting to 3D-printable STL file and many other tips are described in [segmentation tutorials](https://www.slicer.org/wiki/Documentation/Nightly/Training#Slicer4_Image_Segmentation).

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