# 3D volume appears distorted - jaw looks elongated

**URL:** <https://discourse.slicer.org/t/3d-volume-appears-distorted-jaw-looks-elongated/9072>\
**Category:** Support\
**Tags:** dicom\
**Created:** [November 7, 2019, 8:36pm UTC](https://discourse.slicer.org/t/3d-volume-appears-distorted-jaw-looks-elongated/9072 "2019-11-07T20:36:50Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![talalzahid](https://avatars.discourse-cdn.com/v4/letter/t/f9ae1b/32.png) [@talalzahid](https://discourse.slicer.org/u/talalzahid)\
**Post date:** [November 7, 2019, 8:36pm UTC](https://discourse.slicer.org/t/3d-volume-appears-distorted-jaw-looks-elongated/9072/1 "2019-11-07T20:36:50Z")

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Hi,

I am trying to convert the dental CBCT scan into a 3d model to be printed. however when I do that the end result does not look realistic and the jaw looks elongated and the compressed.

I have uploaded a picture for the result [https://imgur.com/a/NlA2vUm](https://imgur.com/a/NlA2vUm)

When I upload the cbct it show a warning " multi-frame image. If slice orientation or spacing is non-uniform, then the image may be displayed incorrectly" however, I do not think this is possible. Is there is a way to fix this?

I have the Dicom files uploaded if anyone is interested in checking it.

Thank you in advance

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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:** [November 7, 2019, 8:38pm UTC](https://discourse.slicer.org/t/3d-volume-appears-distorted-jaw-looks-elongated/9072/2 "2019-11-07T20:38:17Z")

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Most likely you have run into a known problem with Dolphin CBCT scanners. See the solution here: [DVT import with wrong dimensions](https://discourse.slicer.org/t/dvt-import-with-wrong-dimensions/4284/4)

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**Author:** ![talalzahid](https://avatars.discourse-cdn.com/v4/letter/t/f9ae1b/32.png) [@talalzahid](https://discourse.slicer.org/u/talalzahid)\
**Post date:** [November 11, 2019, 10:42pm UTC](https://discourse.slicer.org/t/3d-volume-appears-distorted-jaw-looks-elongated/9072/3 "2019-11-11T22:42:29Z")

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Thank you so much worked like a charm.

I encountered another problem when I try to using dicom files from medical ct scans. The render is not smooth and look like layers as seen in the picture on the following link

[[Album] Imgur ![](https://i.imgur.com/KljyAY5.jpg?fb "Imgur") ](https://imgur.com/a/I4INAgM)

any idea ?

Thank you in advance

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<div class="post-metadata">

**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:** [November 12, 2019, 12:31am UTC](https://discourse.slicer.org/t/3d-volume-appears-distorted-jaw-looks-elongated/9072/4 "2019-11-12T00:31:08Z")

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It seems that the volume has spacing between slices that is about 10x larger than pixel spacing within a slice. Use `Crop Volume` module to resample the volume with isotropic voxel size by checking `Isotropic spacing` checkbox and selecting `B-spline` interpolation. After this segment the cropped/resample volume using Segment Editor module.