Alternative grating designs for cone-beam edge illumination x-ray phase contrast imaging

P.-J. Vanthienen; J. Sanctorum; B. Huyge; N. Six; J. Sijbers; J. De Beenhouwer

doi:10.1117/12.2632301

14 October 2022 Alternative grating designs for cone-beam edge illumination x-ray phase contrast imaging

P.-J. Vanthienen, J. Sanctorum, B. Huyge, N. Six, J. Sijbers, J. De Beenhouwer

Proceedings Volume 12242, Developments in X-Ray Tomography XIV; 122420Z (2022) https://doi.org/10.1117/12.2632301
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Edge illumination X-ray phase contrast imaging is a method which relies on two gratings to obtain attenuation, phase and dark field contrast. Current gratings consist of periodic apertures in a high-absorbing flat plate. While edge illumination was originally designed for parallel-beam imaging, it also works with cone-beam sources when the opening angle is sufficiently low. With higher opening angles, however, current gratings cause a shadow which results in a decreased intensity. In this paper, three alternative grating geometries are studied with Monte-Carlo simulations and their performance is evaluated in terms of shadowing. Results show that the alternative grating geometries significantly reduce shadowing in cone-beam based edge illumination.

Conference Presentation

Citation Download Citation

P.-J. Vanthienen, J. Sanctorum, B. Huyge, N. Six, J. Sijbers, and J. De Beenhouwer "Alternative grating designs for cone-beam edge illumination x-ray phase contrast imaging", Proc. SPIE 12242, Developments in X-Ray Tomography XIV, 122420Z (14 October 2022); https://doi.org/10.1117/12.2632301

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