[Rtk-users] Truncation artifact recovery

[Simon Rit]

Hi,
FieldOfViewImageFilter only masks out what is not in the FOV. Is this
masking failing or is the problem the white artefacts in the FOV?
In the latter case, the only heuristic truncation is that of Ohnesorge et al
<https://doi.org/10.1118/1.598855>, which can be set like this
https://github.com/RTKConsortium/RTK/blob/master/applications/rtkfdk/rtkfdk.cxx#L145C3-L145C46
where 0 means no correction, 1 means padding with the same size as the
input and values between 0 and 1 are a fraction of the size.
Otherwise, you may want to consider iterative reconstruction but it seems
that you have an interior problem which cannot be solved. See this article
<https://doi.org/10.1109/MSP.2010.936743> for a review of the literature on
this topic.
Simon


On Wed, Feb 19, 2025 at 2:08 AM 王治阵 <2023200830 at mail.buct.edu.cn> wrote:

> Hi,
>
> Recently, I was using FDK algorithm for CBCT, but when I used
> FieldOfViewImageFilter(), there were some truncation artifacts at the
> beginning and end of reconstruction results, which may be caused by
> insufficient data collection. Then, is there any algorithm in ITK and RTK
> that can eliminate truncation artifacts and restore the original field of
> view with some methods?
>
> The small field of view is the truncation artifact, and the large field of
> view is the original field of view.
>
> _______________________________________________
> Rtk-users mailing list
> rtk-users at openrtk.org
> https://www.creatis.insa-lyon.fr/mailman/listinfo/rtk-users
>
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