Article
Materials Science, Characterization & Testing
Xiuyuan Yang, Wenjuan Sun, Claudiu L. Giusca
Summary: This paper investigates the critical step of surface determination in X-ray Computed Tomography, demonstrating the effectiveness of the marker-controlled watershed algorithm in automating the process and improving its performance.
NDT & E INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Jonathan Slocombe, Liam Blunt
Summary: XCT is a valid method for quantifying surface metrology of parts, but small changes in capture settings can affect the surface data extracted. This study investigates the effects of refocusing on the extracted surface data and compares it to the variation resulting from filament changes.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Ralf Gutjahr, Robbert C. Bakker, Feiko Tiessens, Sebastiaan A. van Nimwegen, Bernhard Schmidt, Johannes Frank Wilhelmus Nijsen
Summary: The study evaluated the feasibility of dual-energy CT-based material decomposition to detect and quantify holmium microspheres in phantoms and rabbits. Results showed that spectral material decomposition using different tube voltage combinations allowed accurate quantifications for concentrations down to 0.125 mg/mL holmium.
EUROPEAN RADIOLOGY
(2021)
Article
Engineering, Manufacturing
Daniel Gallardo, Lucia-Candela Diaz, Roberto Jimenez, Marta Torralba, Jose Antonio Albajez, Jose Antonio Yague Fabra
Summary: X-ray computed to-mography (XCT) has the potential for surface characterisation in polymeric additive manufacturing (AM). This study presents the use of XCT to analyse different polymeric AM surfaces, comparing roughness parameters with reference measurements. The results demonstrate that XCT can be used for roughness evaluation in polymeric AM, with different suitable parameters depending on the technology.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Geological
M. A. Pirzada, M. Bahaaddini, O. Moradian, H. Roshan
Summary: The study investigates the evolution of contact area and fracture aperture during the shearing process of rock discontinuities, revealing a complex process influenced by various factors such as initial surface mismatch, dilation, damage of asperities, and gouge production. The results have significant implications for predicting shearing behavior of faults and fractures by measuring the actual stresses acting on the fracture surfaces.
ENGINEERING GEOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Ronald Booij, Marcel van Straten, Andreas Wimmer, Ricardo P. J. Budde
Summary: The study evaluated the impact of breathing state on the accuracy of a 3D camera for body contour detection and patient positioning in thoracic CT. Results showed that acquiring camera images and subsequent CT scans in the same breathing state leads to accurate and precise patient positioning. It is recommended to obtain expiratory planning images when performing a thoracic CT scan in both inspiratory and expiratory breathing states.
EUROPEAN RADIOLOGY
(2022)
Article
Engineering, Manufacturing
Wenjuan Sun, Claudiu Giusca, Shan Lou, Xiuyuan Yang, Xiao Chen, Tony Fry, Xiangqian Jiang, Alan Wilson, Stephen Brown, Hal Boulter
Summary: Metal additively-manufactured (AM) parts are increasingly used as safety-critical components in industry. However, the surface textures of these parts are different from conventionally machined surfaces, which can directly affect their functional performance. This paper proposes the use of X-ray computed tomography (XCT) as a non-destructive technique to measure the non-line-of-sight surfaces of AM parts. The authors establish a measurement protocol using a prototype roughness standard and evaluate the uncertainty of the surface texture.
ADDITIVE MANUFACTURING
(2022)
Review
Construction & Building Technology
Jaber Taheri-Shakib, Adil Al-Mayah
Summary: X-ray Computed Tomography (CT) imaging is used to analyze the microstructural characteristics and evolution of asphalt mixtures, providing insights into their macroscopic performance. CT allows for the visualization and analysis of void spaces, permeability, deformation, cracks, and the distribution of components in asphalt mixtures. It is a powerful tool for monitoring and investigating damage processes and treatment effects.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Shahabeddin Dayani, Henning Markoetter, Anita Schmidt, Martinus Putra Widjaja, Giovanni Bruno
Summary: The effectiveness of several X-ray computer tomography techniques for studying commercial batteries is demonstrated in this paper. General guidelines are provided for selecting suitable imaging equipment and parameters for investigations of lithium-ion batteries at different length scales. Safety mechanisms, manufacturing inconsistencies, defects, and inhomogeneity in batteries are illustrated and quantified. The relationship between beam energy, sample-detector distance, and contrast retrieved from attenuation and phase shift is examined using Synchrotron XCT.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Davide Ippolito, Teresa Giandola, Cesare Maino, Anna Pecorelli, Carlo Capodaglio, Maria Ragusi, Marco Porta, Davide Gandola, Alessandro Masetto, Silvia Drago, Pietro Allegranza, Rocco Corso, Cammillo Talei Franzesi, Sandro Sironi
Summary: This study analyzed pulmonary embolism (PE) in hospitalized patients affected by SARS-CoV-2 through chest CTPA, finding that PE-positive patients had slightly longer hospitalization time and majority were hospitalized in non-intensive wards. Overall, 85.9% of patients were discharged in three months, with a 14.1% mortality rate, among which 54.2% were PE-positive.
Article
Radiology, Nuclear Medicine & Medical Imaging
Stefanie J. Bette, Franziska M. Braun, Mark Haerting, Josua A. Decker, Jan H. Luitjens, Christian Scheurig-Muenkler, Thomas J. Kroencke, Florian Schwarz
Summary: In this study comparing PCD-CT and EID-CT in mouse specimens, PCD-CT demonstrated lower image noise, higher SNR, and better edge sharpness compared to EID-CT. Radiologists consistently preferred PCD-CT for visualizing bone details, even in SNR-matched pairs.
EUROPEAN RADIOLOGY
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Lenhard Pennig, David Zopfs, Roman Gertz, Johannes Bremm, Charlotte Zaeske, Nils Grosse Hokamp, Erkan Celik, Lukas Goertz, Marcel Langenbach, Thorsten Persigehl, Amit Gupta, Jan Borggrefe, Simon Lennartz, Kai Roman Laukamp
Summary: Virtual monoenergetic images (VMI) and metal artifact reduction (MAR) algorithms derived from spectral detector CT (SDCT) of the chest effectively reduce artifacts from cardiac implantable electronic devices (CIEDs), improving diagnostic assessment of surrounding structures.
EUROPEAN RADIOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Alexey Surov, Hans Jonas Meyer, Mattes Hinnerichs, Vincenzo Ferraro, Vanja Zeremski, Dimitrios Mougiakakos, Sylvia Saalfeld, Andreas Wienke, Alexandra Strobel, Denise Wolleschak
Summary: Objective body composition assessment derived from cross-sectional imaging has shown promising results as a prognostic biomarker in several tumor entities. In this study, we aimed to analyze the role of low skeletal muscle mass and fat areas for prognosis of dose-limiting toxicity and treatment response in patients with primary central nervous system lymphoma.
EUROPEAN RADIOLOGY
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Uttam K. Bodanapally, Thorsten R. Fleiter, Bizhan Aarabi, Ajay Malhotra, Dheeraj Gandhi
Summary: This technical note introduces a new DECT protocol and iodine map reconstruction technique for visualizing membranes in chronic subdural hematoma. Results showed that all 50 hematomas had an enhancing external membrane, with 13 having an incomplete internal membrane and 23 having a complete internal membrane. A spandrel sign indicating partial or complete formation of the internal membrane was observed in 36 hematomas.
EUROPEAN RADIOLOGY
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
D. Zopfs, M. Rinneburger, D. Pinto dos Santos, R. P. Reimer, K. R. Laukamp, D. Maintz, S. Lennartz, N. Grosse Hokamp
Summary: This study demonstrated that simple attenuation measurements using VNC imaging can predict the presence of anemia and differentiate between healthy individuals and those with varying degrees of anemia. A linear relationship between HbS and attenuation on VNC suggests a potential for accurate prediction of anemia based on contrast-enhanced SDCT examinations.
EUROPEAN RADIOLOGY
(2021)
Article
Marine & Freshwater Biology
Malik S. Naumann, Imma Tolosa, Marco Taviani, Renaud Grover, Christine Ferrier-Pages
Editorial Material
Marine & Freshwater Biology
U. Cardini, N. van Hoytema, C. Wild, M. S. Naumann, M. M. D. Al-Rshaidat, H. Schuhmacher, C. Wild
Editorial Material
Marine & Freshwater Biology
Malik S. Naumann, Laura Rix, Fuad A. Al-Horani, Christian Wild
BULLETIN OF MARINE SCIENCE
(2016)
Article
Ecology
Ulisse Cardini, Vanessa N. Bednarz, Nanne van Hoytema, Alessio Rovere, Malik S. Naumann, Mamoon M. D. Al-Rshaidat, Christian Wild
Article
Ecology
Laura Rix, Jasper M. de Goeij, Dick van Oevelen, Ulrich Struck, Fuad A. Al-Horani, Christian Wild, Malik S. Naumann
FUNCTIONAL ECOLOGY
(2017)
Article
Marine & Freshwater Biology
Nanne van Hoytema, Vanessa N. Bednarz, Ulisse Cardini, Malik S. Naumann, Fuad A. Al-Horani, Christian Wild
Article
Environmental Sciences
F. Roth, G. C. Lessa, C. Wild, R. K. P. Kikuchi, M. S. Naumann
MARINE POLLUTION BULLETIN
(2016)
Article
Ecology
Laura Rix, Jasper M. de Goeij, Dick van Oevelen, Ulrich Struck, Fuad A. Al-Horani, Christian Wild, Malik S. Naumann
MARINE ECOLOGY PROGRESS SERIES
(2018)
Article
Multidisciplinary Sciences
Vanessa N. Bednarz, Malik S. Naumann, Ulisse Cardini, Nanne van Hoytema, Laura Rix, Mamoon M. D. Al-Rshaidat, Christian Wild
Article
Ecology
Laura Rix, Jasper M. de Goeij, Dick van Oevelen, Ulrich Struck, Fuad A. Al-Horani, Christian Wild, Malik S. Naumann
MARINE ECOLOGY PROGRESS SERIES
(2018)
Article
Multidisciplinary Sciences
Laura Rix, Jasper M. de Goeij, Christina E. Mueller, Ulrich Struck, Jack J. Middelburg, Fleur C. van Duyl, Fuad A. Al-Horani, Christian Wild, Malik S. Naumann, Dick van Oevelen
SCIENTIFIC REPORTS
(2016)
Article
Microbiology
Arjen Tilstra, Nanne van Hoytema, Ulisse Cardini, Vanessa N. Bednarz, Laura Rix, Malik S. Naumann, Fuad A. Al-Horani, Christian Wild
FRONTIERS IN MICROBIOLOGY
(2018)
Article
Marine & Freshwater Biology
Nanne van Hoytema, Jasper M. de Goeij, Niklas A. Kornder, Yusuf El-Khaled, Dick van Oevelen, Laura Rix, Ulisse Cardini, Vanessa N. Bednarz, Malik S. Naumann, Fuad A. Al-Horani, Christian Wild
Summary: Coral reefs in the northern Red Sea experience strong seasonality and this study aimed to quantify the seasonal carbon fluxes in these reefs. The study used incubations and linear inverse models to assess the carbon cycling. The results showed that the coral reef ecosystem was heterotrophic throughout the seasons and sponge communities played a significant role in carbon cycling.
Correction
Marine & Freshwater Biology
Nanne van Hoytema, Jasper M. de Goeij, Niklas A. Kornder, Yusuf El-Khaled, Dick van Oevelen, Laura Rix, Ulisse Cardini, Vanessa N. Bednarz, Malik S. Naumann, Fuad A. Al-Horani, Christian Wild
Article
Environmental Sciences
J. Murray Roberts, Colin W. Devey, Arne Biastoch, Marina Carreiro-Silva, Tina Dohna, Boris Dorschel, Vikki Gunn, Veerle A. I. Huvenne, David Johnson, Didier Jollivet, Ellen Kenchington, Kate Larkin, Marjolaine Matabos, Telmo Morato, Malik S. Naumann, Covadonga Orejas, J. Angel A. Perez, Stefan A. Ragnarsson, Albertus J. Smit, Andrew Sweetman, Sebastian Unger, Benjamin Boteler, Lea-Anne Henry
Summary: Ocean ecosystems are facing climate and biodiversity crises, and there is a lack of unified approach to assess their state and inform sustainable policies. This blueprint emphasizes research capabilities and cross-sectoral partnerships, and highlights priorities including integrating observation, modeling, and genomic approaches, improving ecosystem mapping, identifying potential tipping points, understanding compound impacts of multiple stressors, and enhancing spatial and temporal management and protection. International cooperation and funding are crucial to support science-led policies that conserve ocean ecosystems and transcend jurisdictional borders.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)