Confidence map tool for gradient-based X-ray phase contrast imaging

We present a graphical tool that we call a "confidence map". It allows to evaluate locally the quality of a phase image retrieved from the measurement of its gradients. The tool is primarily used to alert the observer to the presence of artifacts that could affect his interpretation of the...

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Bibliographic Details
Published in:Optics express 2022-01, Vol.30 (3), p.4302-4311
Main Authors: Stolidi, Adrien, Giakoumakis, Georges, Primot, Jérôme, Jarnac, Amélie, Tisseur, David
Format: Article
Language:English
Subjects:
Computational Physics
Instrumentation and Detectors
Optics
Physics
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Summary:We present a graphical tool that we call a "confidence map". It allows to evaluate locally the quality of a phase image retrieved from the measurement of its gradients. The tool is primarily used to alert the observer to the presence of artifacts that could affect his interpretation of the image. It can also be used to optimize a phase imager since it associates a cause with the creation of each artifact: dislocation, under-sampling and noise. An illustration of the use of the confidence map tool is presented, based on a microfocus X-ray tube using multilateral shearing interferometry, a gradient based phase contrast technique employing a single 2D-grating.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.438876