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International Workshop on Artefacts in x-Ray Tomography

The international workshop "Artefacts in X-Ray Tomography" held from 9 to 13 February 2015 at the Lorentz Center in Leiden (The Netherlands) aimed at initiate an in-depth discussion on the various artefacts that arise in X-ray computed tomography both using laboratory and synchrotron sources. The mismatch between the models based on theoretical X-ray physics and the real-world experiments plays a crucial role in making advanced algorithms work well on complex measurement data.
Discrepancies between physical reality on one hand and the available mathematical models on the other hand, arise from a variety of sources, including optical and mechanical distortions. Together with image perturbations related to the mathematical inverse problems that are solved after acquiring the data, all of these aspects lead to so-called "artefacts": structured distortions of the images that hamper image contrast and resolution.
In particular, the Workshop aimed to start an in-depth discussion on the various artefacts that arise in X-ray tomography and to catalog these distortions. Moreover, both engineering-based and computation-based solutions for their reduction have been proposed involving new communities in the discussion.
The workshop has been co-funded by the EXTREMA COST Action, a European research network focused on advanced X-ray tomography and was attended by 54 participants from several European countries and United States.
The poster session offered an opportunity to exchange the know-how and to debate technical and  mathematical developments and research prospects. The most vivid discussions were made during the afternoon round tables when “problematic” data sets collected at various synchrotron facilities were shared and new numerical methods were proposed and implemented to mitigate the artefacts.

Last Updated on Wednesday, 15 April 2015 12:06