Signal Decomposition for X-ray Dark-Field Imaging
Sebastian Kaeppler,Florian Bayer,Thomas Weber,Andreas Maier,Gisela Anton,Joachim Hornegger,Matthias W. Beckmann,Peter A. Fasching,Arndt Hartmann,Felix Heindl,Thilo Michel,Gueluemser Oezguel,Georg Pelzer,Claudia Rauh,Jens Rieger,Rüdiger Schulz-Wendtland,Michael Uder,David L. Wachter,Evelyn Wenkel,Christian Riess +19 more
- Vol. 17, pp 170-177
TLDR
This paper presents a novel--and to the knowledge the first--algorithm for isolating small-angle scattering in dark-field images, which greatly improves their interpretability and promises a greatly enhanced diagnostic value of dark- field images.Abstract:
Grating-based X-ray dark-field imaging is a new imaging modality. It allows the visualization of structures at micrometer scale due to small-angle scattering of the X-ray beam. However, reading dark-field images is challenging as absorption and edge-diffraction effects also contribute to the dark-field signal, without adding diagnostic value. In this paper, we present a novel – and to our knowledge the first – algorithm for isolating small-angle scattering in dark-field images, which greatly improves their interpretability. To this end, our algorithm utilizes the information available from the absorption and differential phase images to identify clinically irrelevant contributions to the dark-field image. Experimental results on phantom and ex-vivo breast data promise a greatly enhanced diagnostic value of dark-field images.read more
Citations
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Time and Mechanism of Nanoparticle Functionalization by Macromolecular Ligands during Pulsed Laser Ablation in Liquids.
Alexander Letzel,Stefan Reich,Tomy dos Santos Rolo,Tomy dos Santos Rolo,Alexander Kanitz,Jan S. Hoppius,Alexander Rack,Margie P. Olbinado,Andreas Ostendorf,Bilal Gökce,Anton Plech,Stephan Barcikowski +11 more
TL;DR: Complementary ex situ characterization confirms the overall size quenching ability of both additive types NaCl and PVP, and concludes an alternative interaction mechanism with ablated nanoparticles compared to the electrolyte NaCl, probably outside of the cavitation bubble, in the surrounding liquid phase.
Journal ArticleDOI
A beam hardening and dispersion correction for x-ray dark-field radiography
Georg Pelzer,Gisela Anton,Florian Horn,Jens Rieger,André Ritter,Johannes Wandner,Thomas Weber,Thilo Michel +7 more
TL;DR: The authors show that the influence of and dispersion can be quantified by simulation and, thus, measured image data can be corrected and an increase in contrast is shown compared to the original image, which might simplify a further image-based diagnosis.
Journal ArticleDOI
Scalable, large area compound array refractive lens for hard X-rays
TL;DR: In this article, a 2D Compound Array Refractive Lens (CARL) for multi-contrast X-ray imaging is presented, which consists of six stacked polyimide foils with each displaying a two-dimensional array of lenses with a 65μm pitch aiming for a sensitivity on sub-micrometer structures.
Journal ArticleDOI
A Shack-Hartmann sensor for single-shot multi-contrast imaging with hard X-rays
Tomy dos Santos Rolo,Stefan Reich,Dmitry Karpov,Sergey Gasilov,Danays Kunka,Edwin Fohtung,Tilo Baumbach,Anton Plech +7 more
TL;DR: An array of compound refractive X-ray lenses (CRL) with 20 × 20 lenslets, a focal distance of 20cm and a visibility of 0.93 is presented in this article.
Journal ArticleDOI
Review and experimental verification of x-ray dark-field signal interpretations with respect to quantitative isotropic and anisotropic dark-field computed tomography.
TL;DR: In this paper, the Yashiro-Lynch model was used to describe the anisotropic signals of fibrous objects in X-ray and neutron dark-field images and was experimentally verified both in radiographic and tomographic imaging in a monochromatic synchrotron setting.
References
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Journal ArticleDOI
On a dark-field signal generated by micrometer-sized calcifications in phase-contrast mammography
Thilo Michel,Jens Rieger,Gisela Anton,Florian Bayer,Matthias W. Beckmann,Jürgen Durst,Peter A. Fasching,Peter A. Fasching,Wilhelm Haas,Arndt Hartmann,Georg Pelzer,Marcus Radicke,Claudia Rauh,André Ritter,Peter Sievers,Peter Sievers,Rüdiger Schulz-Wendtland,Michael Uder,David L. Wachter,Thomas Weber,Evelyn Wenkel,Andrea Zang +21 more
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