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Large-area full field x-ray differential phase-contrast imaging using 2D tiled gratings

Schröter, Tobias J. 1; Koch, Frieder J. 1; Kunka, Danays 1; Meyer, Pascal 1; Tietze, Sabrina 1; Engelhardt, Sabine 2,3; Zuber, Marcus ORCID iD icon 2,3; Baumbach, Tilo 2,3; Willer, Konstantin; Birnbacher, Lorenz; Prade, Friedrich; Pfeiffer, Franz; Reichert, Klaus-Martin 4; Hofmann, Andreas ORCID iD icon 5; Mohr, Jürgen 1
1 Institut für Mikrostrukturtechnik (IMT), Karlsruher Institut für Technologie (KIT)
2 Laboratorium für Applikationen der Synchrotronstrahlung (LAS), Karlsruher Institut für Technologie (KIT)
3 Institut für Photonenforschung und Synchrotronstrahlung (IPS), Karlsruher Institut für Technologie (KIT)
4 Karlsruher Institut für Technologie (KIT)
5 Institut für Angewandte Informatik (IAI), Karlsruher Institut für Technologie (KIT)


Grating-based x-ray differential phase-contrast imaging (DPCI) is capable of acquiring information based on phase-shift and dark-field signal, in addition to conventional x-ray absorption-contrast. Thus DPCI gives an advantage to investigate composite materials with component wise similar absorption properties like soft tissues. Due to technological challenges in fabricating high quality gratings over a large extent, the field of view (FoV)
of the imaging systems is limited to a grating area of a couple of square centimeters. For many imaging applications (e.g. in medicine), however, a FoV that ranges over several ten centimeters is needed. In this manuscript we propose to create large area gratings of theoretically any extent by assembling a number of individual grating tiles. We discuss the precision needed for alignment of each microstructure tile in order to reduce image artifacts and to preserve minimum 90% of the sensitivity obtainable with a monolithic grating. To achieve a reliable high precision alignment a semiautomatic assembly system consisting of a laser autocollimator, a digital microscope and a force sensor together with positioning devices was built. ... mehr

DOI: 10.1088/1361-6463/aa6e85
Zitationen: 17
Web of Science
Zitationen: 16
Zitationen: 16
Zugehörige Institution(en) am KIT Institut für Angewandte Informatik (IAI)
Institut für Mikrostrukturtechnik (IMT)
Institut für Photonenforschung und Synchrotronstrahlung (IPS)
Universität Karlsruhe (TH) – Interfakultative Einrichtungen (Interfakultative Einrichtungen)
Karlsruhe Nano Micro Facility (KNMF)
Karlsruhe School of Optics & Photonics (KSOP)
Laboratorium für Applikationen der Synchrotronstrahlung (LAS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2017
Sprache Englisch
Identifikator ISSN: 0022-3727, 1361-6463, 0262-8171, 0508-3443
KITopen-ID: 1000070126
HGF-Programm 43.23.02 (POF III, LK 01) X-Ray Optics
Erschienen in Journal of physics / D
Verlag Institute of Physics Publishing Ltd (IOP Publishing Ltd)
Band 50
Heft 22
Seiten Art.Nr. 225401
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