# itkThickness3D
**URL:** https://discourse.itk.org/t/itkthickness3d/1918
**Category:** Algorithms
**Created:** [May 28, 2019, 4:01pm UTC](https://discourse.itk.org/t/itkthickness3d/1918 "2019-05-28T16:01:19Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Marco\_Festugato](https://discourse.itk.org/u/Marco_Festugato)
#### Post date: [May 28, 2019, 4:01pm UTC](https://discourse.itk.org/t/itkthickness3d/1918/1 "2019-05-28T16:01:19Z")
Hello everyone, I want to use the itkThickness3D filter in order to compute the 3D skeleton of my segmented blood vessels. I can’t find any documentation yet, so I dont know if with this filter (or another one) I can calculate some parameters of my skeleton (number of branchpoints, number of vascular trees, **especially** I need to calculate the “_ **sum of angles** _” metric… do u know if I can calculate them with this filter? Or if with another one, which one?
Thanks in advance for any help!
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### Author:  [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)
#### Post date: [June 11, 2019, 5:31pm UTC](https://discourse.itk.org/t/itkthickness3d/1918/2 "2019-06-11T17:31:14Z")
Hi Marco,
Documentation related to the Thickness 3D filter can be found [in its Insight Journal article](https://www.insight-journal.org/browse/publication/181).
@phcerdan @T4mmi may have other suggestions, too.
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### Author:  [@T4mmi](https://discourse.itk.org/u/T4mmi)
#### Post date: [June 11, 2019, 7:35pm UTC](https://discourse.itk.org/t/itkthickness3d/1918/3 "2019-06-11T19:35:38Z")
the paper @matt.mccormick pointed is the implementation of the skeletonization.
As stated in the [GitHub readme](https://github.com/InsightSoftwareConsortium/ITKThickness3D) this is a curvature thinning (one pixel thick/wide skeleton) build using [itkBinaryThinningImageFilter3D](https://github.com/InsightSoftwareConsortium/ITKThickness3D/blob/master/include/itkBinaryThinningImageFilter3D.h).
Just be careful the ThicknessImageFilter is still [buggy](https://github.com/InsightSoftwareConsortium/ITKThickness3D/issues/16)
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### Author:  [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)
#### Post date: [June 12, 2019, 3:58pm UTC](https://discourse.itk.org/t/itkthickness3d/1918/4 "2019-06-12T15:58:31Z")
> [@T4mmi](#):
>
> Just be careful the ThicknessImageFilter is still [buggy](https://github.com/InsightSoftwareConsortium/ITKThickness3D/issues/16)
This PR addresses the segfault:
>
>
> m\_MultiplyFilter must be instantiated.
>
> Fixes #16
>
> The test now fails due t…o baseline image comparison.