# .vtk export misalignment with CT scans

**URL:** <https://discourse.slicer.org/t/vtk-export-misalignment-with-ct-scans/30416>\
**Category:** Support\
**Created:** [July 5, 2023, 6:28pm UTC](https://discourse.slicer.org/t/vtk-export-misalignment-with-ct-scans/30416 "2023-07-05T18:28:15Z")\
**Posts on this page:** 1\
**Showing post:** 8

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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:** [October 26, 2023, 1:35pm UTC](https://discourse.slicer.org/t/vtk-export-misalignment-with-ct-scans/30416/8 "2023-10-26T13:35:00Z")

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This error has been reported a few times here on the forum. The problem is that DICOM image import in Bonemat is implemented poorly.

I would recommend not to use Bonemat but instead use the corresponding features in Slicer - see more details here:

> [@Dicom to rectilinear grid vtk](https://discourse.slicer.org/t/dicom-to-rectilinear-grid-vtk/28289/9):
>
> By the way, it seems that [all that bonemat can do](http://www.bonemat.org/downloads/Bonemat_manual.pdf) you can already do in Slicer. For the parameter mapping from CT densities to mechanical properties you can use a few lines of Python code (or using [py\_bonemat\_abaqus](https://pypi.org/project/py_bonemat_abaqus/)). The license of bonemat is quite restrictive and you can do so much more in Slicer that I would recommend to consider using just Slicer for your workflow.

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_[View the full topic](https://discourse.slicer.org/t/vtk-export-misalignment-with-ct-scans/30416)._