Metal artefact reduction on CT

Hi,

I am trying to segment bone with a metal prosthesis. Is there a plugin that will do this and remove the metal at the same time as segmenting the bone?

you can use the segment editor to deal with it.

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Thanks,

Is there a tutorial on how to do this?

https://www.slicer.org/wiki/Documentation/4.10/Training#Segmentation_for_3D_printing

I agree that for Segment Editor is a good tool for manual removal of metal artefacts. You can find some more background information and detailed description of segmentation related modules and links to tutorials here: https://slicer.readthedocs.io/en/latest/user_guide/image_segmentation.html

In Segment Editor, you can get initial segmentation using Threshold effect (that creates a segment that contains what you need and as small artifact as possible), apply a little Smoothing to make 3D reconstruction faster, enable “Show 3D” and use Scissors tool to cut off artefacts, then apply Smoothing to make the cut surfaces smoother.

@timeanddoctor do you have a workflow that you find that usually works well for you?

For automatic removal/reduction of artefacts the most effective tools are implemented in the CT scanner and workstation, as they require special image acquisition protocols and 3D reconstruction techniques. If the image is already reconstructed into a 3D volume then there is no generally applicable artefact removal method, but you can still develop techniques that work for certain kind of images. If you post a few screenshots then we might be able to give more specific advice.