Design of a compact high-energy setup for x-ray phase-contrast imaging

Schuettler M, Yaroshenko A, Bech M, Potdevin G, Malecki A, Chabior M, Wolf J, Tapfer A, Meiser J, Kunka D, Amberger M, Mohr J, Pfeiffer F (2014)

Publication Type: Conference contribution

Publication year: 2014

Journal

Progress in Biomedical Optics and Imaging - Proceedings of SPIE

Publisher: SPIE

Book Volume: 9033

Conference Proceedings Title: Progress in Biomedical Optics and Imaging - Proceedings of SPIE

Event location: USA

ISBN: 9780819498267

DOI: 10.1117/12.2042892

Abstract

The main shortcoming of conventional biomedical x-ray imaging is the weak soft-Tissue contrast caused by the small differences in the absorption coefficients between different materials. This issue can be addressed by x-ray phasesensitive imaging approaches, e.g. x-ray Talbot-Lau grating interferometry. The advantage of the three-grating Talbot-Lau approach is that it allows to acquire x-ray phase-contrast and dark-field images with a conventional lab source. However, through the introduction of the grating interferometer some constraints are imposed on the setup geometry. In general, the grating pitch and the mean x-ray energy determine the setup dimensions. The minimal length of the setup increases linearly with energy and is proportional to p2, where p is the grating pitch. Thus, a high-energy (100 keV) compact grating-based setup for x-ray imaging can be realized only if gratings with aspect-ratio of approximately 300 and a pitch of 1-2 μm were available. However, production challenges limit the availability of such gratings. In this study we consider the use of non-binary phase-gratings as means of designing a more compact grating interferometer for phase-contrast imaging. We present simulation and experimental data for both monochromatic and polychromatic case. The results reveal that phase-gratings with triangular-shaped structures yield visibilities that can be used for imaging purposes at significantly shorter distances than binary gratings. This opens the possibility to design a high-energy compact setup for x-ray phase-contrast imaging. Furthermore, we discuss different techniques to achieve triangular-shaped phase-shifting structures. © 2014 SPIE.

Involved external institutions

Technische Universität München (TUM) DE Germany (DE) Karlsruhe Institute of Technology (KIT) DE Germany (DE)

How to cite

APA:

Schuettler, M., Yaroshenko, A., Bech, M., Potdevin, G., Malecki, A., Chabior, M.,... Pfeiffer, F. (2014). Design of a compact high-energy setup for x-ray phase-contrast imaging. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. USA: SPIE.

MLA:

Schuettler, Markus, et al. "Design of a compact high-energy setup for x-ray phase-contrast imaging." Proceedings of the Medical Imaging 2014: Physics of Medical Imaging, USA SPIE, 2014.

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