X-ray micro-computed tomography with amplitude modulated beams (beam tracking, edge illumination): opportunities, challenges, and outlook

Charlotte K. Hagen; Grammatiki Lioliou; Oriol Roche i Morgó; Khushal Shah; Amir Zekavat; Alberto Astolfo; Peter R. T. Munro; Silvia Cipiccia; Marco Endrizzi; Alessandro Olivo

doi:10.1117/12.3029040

24 October 2024 X-ray micro-computed tomography with amplitude modulated beams (beam tracking, edge illumination): opportunities, challenges, and outlook

Charlotte K. Hagen, Grammatiki Lioliou, Oriol Roche i Morgó, Khushal Shah, Amir Zekavat, Alberto Astolfo, Peter R. T. Munro, Silvia Cipiccia, Marco Endrizzi, Alessandro Olivo

Author Affiliations +

Proceedings Volume 13152, Developments in X-Ray Tomography XV; 131520A (2024) https://doi.org/10.1117/12.3029040
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

In recent years, x-ray micro-computed tomography (micro-CT) systems with amplitude modulated beams have gained global interest. These systems feature a modulator, that is, an x-ray opaque mask with periodically spaced apertures, in front of the sample, creating an array of spatially separated beamlets. The approach offers x-ray phase contrast imaging (XPCI), which improves the contrast-to-noise ratio and reveals the presence of sub-resolution inhomogeneities by capturing, respectively, refraction and ultra-small angle scattering (dark field signal) alongside x-ray attenuation. Additionally, the modulator can increase spatial resolution, as the narrow beamlets can transfer higher spatial frequencies without requiring geometric magnification. This brief communication reviews the working principle of the approach and comments on a remaining challenge (relatively long scan times).

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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Charlotte K. Hagen, Grammatiki Lioliou, Oriol Roche i Morgó, Khushal Shah, Amir Zekavat, Alberto Astolfo, Peter R. T. Munro, Silvia Cipiccia, Marco Endrizzi, and Alessandro Olivo "X-ray micro-computed tomography with amplitude modulated beams (beam tracking, edge illumination): opportunities, challenges, and outlook", Proc. SPIE 13152, Developments in X-Ray Tomography XV, 131520A (24 October 2024); https://doi.org/10.1117/12.3029040

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