Pascal Meyer
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View article: Probing ultrafast foam homogenization with grating-based X-ray dark-field imaging
Probing ultrafast foam homogenization with grating-based X-ray dark-field imaging Open
View article: Enhanced grating characterization method for absorbing x-ray gratings by bidirectional angular x-ray transmission
Enhanced grating characterization method for absorbing x-ray gratings by bidirectional angular x-ray transmission Open
High-quality x-ray absorption gratings are essential for grating-based x-ray phase-contrast imaging. Bidirectional angular x-ray transmission (AXT) measurements, as proposed in this work, allow for large-area and nondestructive characteriz…
View article: Signal enhancement in X-ray Talbot interferometry with a pair of concave and convex parabolic phase gratings
Signal enhancement in X-ray Talbot interferometry with a pair of concave and convex parabolic phase gratings Open
X-ray Talbot and Talbot–Lau interferometers consisting of transmission gratings are widely used for X-ray phase imaging, which depicts soft materials. This study exploits the use of a pair of concave and convex parabolic gratings instead o…
View article: Demonstrating grating-based phase-contrast imaging of laser-driven shock waves
Demonstrating grating-based phase-contrast imaging of laser-driven shock waves Open
Single-shot X-ray phase-contrast imaging is used to take high-resolution images of laser-driven strong shock waves. Employing a two-grating Talbot interferometer, we successfully acquire standard absorption, differential phase-contrast, an…
View article: ERRATUM: Design of a Talbot phase-contrast microscopy imaging system with a digital detector for laser-driven X-ray backlighter sources
ERRATUM: Design of a Talbot phase-contrast microscopy imaging system with a digital detector for laser-driven X-ray backlighter sources Open
ERRATUM: Design of a Talbot phase-contrast microscopy imaging system with a digital detector for laser-driven X-ray backlighter sources, S. Schreiner, C. Rauch, B. Akstaller, P. Bleuel, E. Fröjdh, V. Ludwig, A.S. Martynenko, P. Meyer, A. M…
View article: Design of a Talbot phase-contrast microscopy imaging system with a digital detector for laser-driven X-ray backlighter sources
Design of a Talbot phase-contrast microscopy imaging system with a digital detector for laser-driven X-ray backlighter sources Open
Laser-driven shock waves in matter propagate with multiple kilometers per second and therefore require sources like a laser-driven backlighter, which emit the X-rays within picoseconds, to be able to capture sharp images. The small spatial…
View article: Stabilizing high aspect ratio x-ray gratings with top layer resist grid
Stabilizing high aspect ratio x-ray gratings with top layer resist grid Open
A problem with high aspect ratio x-ray gratings, fabricated by the deep x-ray LIGA process, is the collapse of the metallic structure when the resist is removed. A unique method that consists of positioning perpendicular metal bridges on t…
View article: Parabolic gratings enhance the X-ray sensitivity of Talbot interferograms
Parabolic gratings enhance the X-ray sensitivity of Talbot interferograms Open
View article: Correction for Mechanical Inaccuracies in a Scanning Talbot-Lau Interferometer
Correction for Mechanical Inaccuracies in a Scanning Talbot-Lau Interferometer Open
Grating-based X-ray phase-contrast and in particular dark-field radiography are promising new imaging modalities for medical applications. Currently, the potential advantage of dark-field imaging in early-stage diagnosis of pulmonary disea…
View article: Parabolic gratings enhance the X-ray sensitivity of Talbot interferograms
Parabolic gratings enhance the X-ray sensitivity of Talbot interferograms Open
In grating-based X-ray Talbot interferometry, the wave nature of X-ray radiation is exploited to generate phase contrast images of objects that do not generate sufficient contrast in conventional X-ray imaging relying on X-ray absorption. …
View article: Toward the Advanced Manufacturing of Land-Based Wind Turbine Blades: Preprint
Toward the Advanced Manufacturing of Land-Based Wind Turbine Blades: Preprint Open
The National Renewable Energy Laboratory (NREL) and General Electric (GE) are partners within the Additive and Modular Enabled Rotor Blades and Integrated Composites Assembly (AMERICA) project. AMERICA aims to develop advanced manufacturin…
View article: Imaging a microfocus X-ray focal spot with a thin coded aperture
Imaging a microfocus X-ray focal spot with a thin coded aperture Open
View article: Correction for mechanical inaccuracies in a scanning Talbot-Lau interferometer
Correction for mechanical inaccuracies in a scanning Talbot-Lau interferometer Open
Grating-based X-ray phase-contrast and in particular dark-field radiography are promising new imaging modalities for medical applications. Currently, the potential advantage of dark-field imaging in early-stage diagnosis of pulmonary disea…
View article: Correction for mechanical inaccuracies in a scanning Talbot-Lau interferometer
Correction for mechanical inaccuracies in a scanning Talbot-Lau interferometer Open
Grating-based X-ray phase-contrast and in particular dark-field radiography are promising new imaging modalities for medical applications. Currently, the potential advantage of dark-field imaging in early-stage diagnosis of pulmonary disea…
View article: Imaging a microfocus X-ray focal spot with a thin coded aperture
Imaging a microfocus X-ray focal spot with a thin coded aperture Open
Imaging of the focal spot size in X-ray generators can be achieved by means of a pinhole in a highly attenuating material, such as gold. For microfocus generators with spot sizes of only around 10 microns or less, the material must be very…
View article: Investigation on the mechanical interface stability of curved high aspect ratio x-ray gratings made by deep x-ray lithography
Investigation on the mechanical interface stability of curved high aspect ratio x-ray gratings made by deep x-ray lithography Open
We describe the rationale for selecting graphite as a substrate material suitable for manufacturing curved high-aspect ratio metallic x-ray gratings and experimentally validate that its properties satisfy requirements relevant for clinical…
View article: Dark-field computed tomography reaches the human scale
Dark-field computed tomography reaches the human scale Open
Significance X-ray computed tomography (CT) is one of the most commonly used diagnostic three-dimensional imaging modalities today. Conventionally, this noninvasive technique generates contrast by measuring the X-ray attenuation properties…
View article: Single-exposure X-ray phase imaging microscopy with a grating interferometer
Single-exposure X-ray phase imaging microscopy with a grating interferometer Open
The advent of hard X-ray free-electron lasers enables nanoscopic X-ray imaging with sub-picosecond temporal resolution. X-ray grating interferometry offers a phase-sensitive full-field imaging technique where the phase retrieval can be car…
View article: Retrieval of 3D information in X-ray dark-field imaging with a large field of view
Retrieval of 3D information in X-ray dark-field imaging with a large field of view Open
X-ray dark-field imaging is a widely researched imaging technique, with many studies on samples of very different dimensions and at very different resolutions. However, retrieval of three-dimensional (3D) information for human thorax sized…
View article: Noise Reduction for Single-Shot Grating-Based Phase-Contrast Imaging at an X-ray Backlighter
Noise Reduction for Single-Shot Grating-Based Phase-Contrast Imaging at an X-ray Backlighter Open
X-ray backlighters allow the capture of sharp images of fast dynamic processes due to extremely short exposure times. Moiré imaging enables simultaneously measuring the absorption and differential phase-contrast (DPC) of these processes. A…
View article: Dosimetry on first clinical dark‐field chest radiography
Dosimetry on first clinical dark‐field chest radiography Open
Purpose The purpose of this study was to evaluate the dose characteristic for patient examinations at the first clinical X‐ray dark‐field chest radiography system and to determine whether the effective patient dose is within a clinically a…
View article: Staircase array of inclined refractive multi-lenses for large field of view pixel super-resolution scanning transmission hard X-ray microscopy
Staircase array of inclined refractive multi-lenses for large field of view pixel super-resolution scanning transmission hard X-ray microscopy Open
Owing to the development of X-ray focusing optics during the past decades, synchrotron-based X-ray microscopy techniques allow the study of specimens with unprecedented spatial resolution, down to 10 nm, using soft and medium X-ray photon …
View article: Whole-body x-ray dark-field radiography of a human cadaver
Whole-body x-ray dark-field radiography of a human cadaver Open
View article: Development of an Array of Compound Refractive Lenses for Sub-Pixel Resolution, Large Field of View, and Time-Saving in Scanning Hard X-ray Microscopy
Development of an Array of Compound Refractive Lenses for Sub-Pixel Resolution, Large Field of View, and Time-Saving in Scanning Hard X-ray Microscopy Open
A two-dimensional array of compound refractive lenses (2D array of CRLs) designed for hard X-ray imaging with a 3.5 mm2 large field of view is presented. The array of CRLs consists of 2D polymer biconcave parabolic 34 × 34 multi-lenses fab…
View article: Super-Resolution Scanning Transmission X-Ray Imaging Using Single Biconcave Parabolic Refractive Lens Array
Super-Resolution Scanning Transmission X-Ray Imaging Using Single Biconcave Parabolic Refractive Lens Array Open
View article: Quality and parameter control of X-ray absorption gratings by angular X-ray transmission
Quality and parameter control of X-ray absorption gratings by angular X-ray transmission Open
Here we report on a non-destructive, spatially resolving and easy to implement quality and parameter control method for high aspect ratio X-ray absorption gratings. Based on angular X-ray transmission measurements, our proposed technique a…
View article: Influence of secondary effects in the fabrication of submicron resist structures using deep x-ray lithography
Influence of secondary effects in the fabrication of submicron resist structures using deep x-ray lithography Open
Background: Deep x-ray lithography using synchrotron radiation is a prominent technique in the fabrication of high aspect ratio microstructures. The minimum lateral dimensions producible are limited by the primary dose distribution and sec…
View article: Talbot-Lau x-ray phase-contrast setup for fast scanning of large samples
Talbot-Lau x-ray phase-contrast setup for fast scanning of large samples Open
View article: In-vivo X-ray Dark-Field Chest Radiography of a Pig
In-vivo X-ray Dark-Field Chest Radiography of a Pig Open
View article: Low energy X-ray grating interferometry at the Brazilian Synchrotron
Low energy X-ray grating interferometry at the Brazilian Synchrotron Open