Dual-binary phase gratings for x-ray interferometry

Martin Bech

doi:10.1117/12.2643914

14 October 2022 Dual-binary phase gratings for x-ray interferometry

Martin Bech

Proceedings Volume 12242, Developments in X-Ray Tomography XIV; 1224211 (2022) https://doi.org/10.1117/12.2643914
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

X-ray phase-contrast imaging by grating interferometry has in the past decades been established both at synchrotron radiation sources and at conventional x-ray tubes. Due to the sensitivity to x-ray phase shifting, contrast in soft tissue has been improved significantly and the possibilities to do virtual histology of tissue biopsies are being pioneered. Constraints in the design of a grating interferometer are dominated by the phase-shifting structures of the gratings. Typically, binary gratings are used, with alternating regions of shift and no shift. However, other structures are also possible, leading to different patterns of intensity modulations. Here we simulate the possibility of using multiple binary structures in the phase grating, to utilize Moiré effects and avoid the use of attenuating grating structures. In particular the parameters for grating-based phase-contrast imaging using a single optical element are discussed, with focus on laboratory-based x-ray imaging using microfocus sources.

Conference Presentation

Citation Download Citation

Martin Bech "Dual-binary phase gratings for x-ray interferometry", Proc. SPIE 12242, Developments in X-Ray Tomography XIV, 1224211 (14 October 2022); https://doi.org/10.1117/12.2643914

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