Grating-based x-ray phase-contrast imaging at PETRA III

Hipp, Alexander; Beckmann, Felix; Lytaev, Pavel; Greving, Imke; Lottermoser, L.; Dose, T.; Kirchhof, René; Burmester, Hilmar; Schreyer, A.; Herzen, Julia

doi:10.1117/12.2061776

Cited by 10 publications

(9 citation statements)

References 25 publications

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“…The necessary further increase in temporal resolution for the Talbot interferometry-based micro-tomography could be achieved by, yet not limited to: 1) adopting experimental acquisition and image processing schemes which allow avoiding the phase-stepping protocol, e.g., the single-shot method 47 , already tested at the P07 beamline 48 2) improve the sensitivity of the scintillator, particularly the efficiency for the high-energy X-ray photons 3) in the study of this manuscript, we performed the tomographic measurements by firstly rotating the sample, then completing the phase-stepping and repeating this procedure; in the future, the acquisition time could be reduced by firstly making one phase step, then rotating the sample over 180° or 360° and repeating this new procedure.…”

Section: Discussionmentioning

confidence: 99%

Advancing the visualization of pure water transport in porous materials by fast, talbot interferometry-based multi-contrast x-ray micro-tomography

et al. 2016

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The spatio-temporal distribution (4D) of water in porous materials plays a fundamental role in many natural and technological processes. The dynamics of water transport is strongly entangled with the material's pore-scale structure. Understanding their correlation requires imaging simultaneously the 4D water distribution and the porous microstructure. To date, 4D images with high temporal and spatial resolution have been mainly acquired by attenuation-based X-ray micro-tomography, whereby pure water is substituted by saline solutions with high atomic number components to improve image contrast. The use of saline solutions is however not always desirable, as the altered fluid properties may affect the transport process as well or, as it is the case for hydrating cement-based materials, they may modify the chemical reactions and their kinetics. In this study, we aimed at visualizing pure water transport in porous building materials by a new implementation of fast Talbot interferometry-based multi-contrast X-ray micro-tomography at the P07 beamline of the Helmholtz-Zentrum Geesthacht at DESY. We report results from a mortar specimen imaged at three different stages during evaporative drying. We show the possibility of visualizing simultaneously the microstructure and the pore-scale water redistribution by the phase contrast images. In addition, different solid material phases are clearly distinguished in these images. The higher contrast between water and the porous substrate, achievable in the phase contrast images, compared with the attenuation ones, empowers new analysis and allows investigating the correlation between the drying process and the porous microstructure. The approach offers the possibility of studying other chemically inert or reactive water transport processes without any chemical or physical perturbation of the processes themselves.

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Section: Discussionmentioning

confidence: 99%

Advancing the visualization of pure water transport in porous materials by fast, talbot interferometry-based multi-contrast x-ray micro-tomography

et al. 2016

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“…Both taxonomic groups are well suited for this research, since they are very diverse (10,000 and 40,000 described species, respectively) and possess a broad feeding spectrum (for example mycophages, phytophages, predators, saprophages, and sporophages). Tomographic data are acquired at the P05 Beamline operated by HZG at the DESY synchrotron radiation source PETRA III [45][46][47][48][49][50][51] .…”

Section: Use Case: Collaborative Research On the Insect Headmentioning

confidence: 99%

The NOVA project: maximizing beam time efficiency through synergistic analyses of SRμCT data

Schmelzle

Heethoff

Heuveline

et al. 2017

Developments in X-Ray Tomography XI

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Beamtime and resulting SRμCT data are a valuable resource for researchers of a broad scientific community in life sciences. Most research groups, however, are only interested in a specific organ and use only a fraction of their data. The rest of the data usually remains untapped. By using a new collaborative approach, the NOVA project (Network for Online Visualization and synergistic Analysis of tomographic data) aims to demonstrate, that more efficient use of the valuable beam time is possible by coordinated research on different organ systems. The biological partners in the project cover different scientific aspects and thus serve as model community for the collaborative approach. As proof of principle, different aspects of insect head morphology will be investigated (e.g., biomechanics of the mouthparts, and neurobiology with the topology of sensory areas). This effort is accomplished by development of advanced analysis tools

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“…At this energy there was no need to use a water bath for preventing artifacts at the air-plastic boundaries. The setup, experimental procedure and reconstruction process are described in more details in [16].…”

Section: Grating-based Dpc Experiments @ Hemsmentioning

confidence: 99%

Characterization of the CCD and CMOS cameras for grating-based phase-contrast tomography

et al. 2014

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In this article we present the quantitative characterization of CCD and CMOS sensors which are used at the experiments for microtomography operated by HZG at PETRA III at DESY in Hamburg, Germany. A standard commercial CCD camera is compared to a camera based on a CMOS sensor. This CMOS camera is modified for grating-based differential phase-contrast tomography.The main goal of the project is to quantify and to optimize the statistical parameters of this camera system. These key performance parameters such as readout noise, conversion gain and full-well capacity are used to define an optimized measurement for grating-based phase-contrast. First results will be shown.

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Grating-based x-ray phase-contrast imaging at PETRA III

Cited by 10 publications

References 25 publications

Advancing the visualization of pure water transport in porous materials by fast, talbot interferometry-based multi-contrast x-ray micro-tomography

Advancing the visualization of pure water transport in porous materials by fast, talbot interferometry-based multi-contrast x-ray micro-tomography

The NOVA project: maximizing beam time efficiency through synergistic analyses of SRμCT data

Characterization of the CCD and CMOS cameras for grating-based phase-contrast tomography

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