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

Adrien Stolidi (1) , Georges Giakoumakis (1, 2) , Jérôme Primot (3) , Amélie Jarnac (4) , David Tisseur (5)

1 LIC - Laboratoire Instrumentation et Capteurs
2 ONERA, Université Paris Saclay [Palaiseau]
3 DOTA, ONERA, Université Paris Saclay [Palaiseau]
4 DPHY, ONERA, Université Paris Saclay [Palaiseau]
5 LDCI - Laboratoire de Dosimétrie, de Contrôle-commande et Instrumentation

We present in this paper a graphical tool that we propose to call a confidence map, allowing to evaluate locally the quality of a phase image extracted from the measurement of its gradients. This tool is primarily used to alert the observer of 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 to the creation of each artifact: noise, aliasing and dislocation. Illustration of this confidence map tool is proposed on a microfocus X-ray tube using multilateral shearing interferometry, a gradient based phase contrast technique employing a single 2D-grating.

Domains: Physics [physics]; Physics [physics]; Instrumentation and Detectors [physics.ins-det]; Physics [physics]; Physics [physics]; Computational Physics [physics.comp-ph]; Physics [physics]; Physics [physics]; Optics [physics.optics]

Adrien Stolidi, Georges Giakoumakis, Jérôme Primot, Amélie Jarnac, David Tisseur. Confidence map tool for gradient based X-ray phase contrast imaging. Optics Express, 2022, 30 (3), pp.4302-4311. ⟨10.1364/OE.438876⟩. ⟨cea-04001315⟩