# Post-reconstruction suppression of CT streaking artifacts?

**URL:** <https://discourse.itk.org/t/post-reconstruction-suppression-of-ct-streaking-artifacts/1487>\
**Category:** Algorithms\
**Created:** [December 18, 2018, 8:55pm UTC](https://discourse.itk.org/t/post-reconstruction-suppression-of-ct-streaking-artifacts/1487 "2018-12-18T20:55:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![dzenanz](https://discourse.itk.org/user_avatar/discourse.itk.org/dzenanz/32/1093_2.png) [@dzenanz](https://discourse.itk.org/u/dzenanz)\
**Post date:** [December 18, 2018, 8:55pm UTC](https://discourse.itk.org/t/post-reconstruction-suppression-of-ct-streaking-artifacts/1487/1 "2018-12-18T20:55:08Z")

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Is there some source code available to deal with streaking artifacts arising from high contrast in CT images?

Here is an example axial slice:

 ![A110](https://discourse.itk.org/uploads/default/original/1X/7fdad23f33401fc4c0c00269ac597fb182f6e1b3.png)  
The bright blob is a cross-section of carotid artery, and the streaks emanating from it are the artifacts I would like to suppress.

Here is another slice from the same image, after the carotid has branched a bit:

 ![A200](https://discourse.itk.org/uploads/default/original/1X/e983920c927a040391cb46dc6c79ab0de0b97393.png)

I am most interested in is suppression of high-intensity artifacts close the the vessels, which could potentially be confused with vessel branches.

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**Author:** ![dzenanz](https://discourse.itk.org/user_avatar/discourse.itk.org/dzenanz/32/1093_2.png) [@dzenanz](https://discourse.itk.org/u/dzenanz)\
**Post date:** [December 18, 2018, 9:27pm UTC](https://discourse.itk.org/t/post-reconstruction-suppression-of-ct-streaking-artifacts/1487/2 "2018-12-18T21:27:13Z")

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@simon.rit Is there something suitable in [RTK](https://github.com/SimonRit/RTK)?

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**Author:** ![simon.rit](https://discourse.itk.org/letter_avatar_proxy/v4/letter/s/f08c70/32.png) [@simon.rit](https://discourse.itk.org/u/simon.rit)\
**Post date:** [December 18, 2018, 9:38pm UTC](https://discourse.itk.org/t/post-reconstruction-suppression-of-ct-streaking-artifacts/1487/3 "2018-12-18T21:38:23Z")

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What RTK has is mostly based on iterative reconstruction but I guess you don’t have the projection images and the scanner geometry? I have never worked on any post-processing for such artifacts, since it’s motion and sampling issues in the tomography, working on it during reconstruction is more natural.