Article
Engineering, Petroleum
Josue Mauricio Plata Chaves, Rosangela Barros Zanoni Lopes Moreno
Summary: This study presents a workflow to create porosity and permeability models from CT images at different resolution scales, ultimately determining the upscaled value for the samples. Different modeling approaches can be chosen based on the type of heterogeneities associated with the sample, allowing for simulation of rock characteristics at various scales.
Article
Materials Science, Composites
Peter J. Creveling, John Fisher, Chris Dahlkamp, Michael W. Czabaj
Summary: This study presents a new approach to convert X-ray microcomputed tomography image data into high-fidelity finite element meshes using existing image segmentation and meshing tools. The results demonstrate that the mesh-generation approach allows for modeling distinct interactions between constituents, but the high number of elements required for discretization necessitates further work to improve mesh efficiency.
COMPOSITES SCIENCE AND TECHNOLOGY
(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
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
Soil Science
Tiago Stumpf da Silva, Mansonia Pulido-Moncada, Marcelo Raul Schmidt, Sheela Katuwal, Steffen Schlueter, John Maximilian Koehne, Michael Mazurana, Lars Juhl Munkholm, Renato Levien
Summary: The legacy of chiseling in a no-tillage system in subtropical climate was assessed, showing a slight residual effect after 5 years of no-tillage, and the high capacity of CT image analysis for predicting gas transport was demonstrated.
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
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
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
Claes Hakansson, Gustav Torisson, Elisabet Londos, Oskar Hansson, Isabella M. Bjorkman-Burtscher, Danielle van Westen
Summary: This study found that introducing a template for radiological reporting of NECT in the primary care diagnostic work up of cognitive impairment significantly increased the mentioning of MTA, WMC, and GCA in radiology reports, as well as the percentage of reports where all parameters were mentioned. The findings suggest that using contextual radiological assessment with VRS could increase the reporting frequency of radiology findings in the diagnostic work up of cognitive impairment, but compliance with templates may be difficult to endorse.
EUROPEAN RADIOLOGY
(2021)
Article
Materials Science, Ceramics
Faheem Muhammed, Tania Lavaggi, Laure Moretti, Suresh Advani, John W. Gillespie
Summary: Carbon-carbon composites (CCCs), as carbon-fiber reinforced materials, exhibit excellent thermomechanical properties under extreme environmental conditions. In order to reduce cost and processing time, a 7-hour pyrolytic schedule was proposed and successfully achieved for a thermoset benzoxazine-derived CCCs through an optimization process. The optimization involved using a multi-stage nth-order kinetics model to limit individual reaction rates and prevent layer separations and fiber rupture during thermal processing. X-Ray 3D Computed Tomography was used to evaluate the modified results post heat treatment, ensuring a fully interconnected porous microstructure with minimal closed void volume. A 1D model was also proposed to predict internal pressure generated during the final ramp, providing upper bounds for the optimization protocol in terms of sample thicknesses and applied ramp rates.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Marine
Jinhuan Zhao, Changling Liu, Chengfeng Li, Yongchao Zhang, Qingtao Bu, Nengyou Wu, Yang Liu, Qiang Chen
Summary: Characterizing the electrical property of hydrate-bearing sediments is crucial for reservoir identification and saturation evaluation. This study investigates the effect of hydrates on pore water and the relationship between pore water characteristics and the saturation exponent of Archie's law. By using X-ray computed tomography and resistivity measurement technology, the three-dimensional structure and resistivity of hydrate-bearing sediments can be derived simultaneously, allowing for a better understanding of pore water and the saturation exponent at a micro-scale. The results show that the resistivity of hydrate-bearing sediments is influenced by changes in pore water distribution and connectivity caused by hydrate formation. Furthermore, the saturation exponent of Archie's law is controlled by the distribution and connectivity of pore water. A new logarithmic relationship between the saturation exponent and the tortuosity of pore water is proposed, which can be helpful in calculating field hydrate saturation using resistivity logging data.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Wenjia Du, Rhodri E. Owen, Anmol Jnawali, Tobias P. Neville, Francesco Iacoviello, Zhenyu Zhang, Sebastien Liatard, Daniel J. L. Brett, Paul R. Shearing
Summary: Gas generation within Li-ion batteries can reduce their cycle lifetime, and high-energy X-ray tomography can be used to study gas evolution and structural changes non-destructively. Observations on deformation caused by gas agglomeration and quantification of gas distribution provide insights into cell degradation mechanisms.
JOURNAL OF POWER SOURCES
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Andre Euler, Sara Wullschleger, Thomas Sartoretti, Daniel Mueller, Etienne Xavier Keller, Dejan Lavrek, Olivio Donati
Summary: This study assessed the accuracy of low-dose dual-energy computed tomography (DECT) to differentiate uric acid from non-uric acid kidney stones. The results showed that DECT accurately discriminated uric acid and non-uric acid stones, even at small stone sizes.
EUROPEAN RADIOLOGY
(2023)
Article
Geochemistry & Geophysics
Paulina I. Krakowska-Madejska, Jadwiga A. Jarzyna
Article
Chemistry, Inorganic & Nuclear
Jadwiga Mazur, Krzysztof Kozak, Dominik Grzadziel, Szymon Gugula, Mariusz Mroczek, Beata Kozlowska, Agata Walencik-Lata, Zuzanna Podgorska, Katarzyna Woloszczuk, Tadeusz Przylibski, Agata Kowalska, Elzbieta Domin, Malgorzata Wysocka, Stanislaw Chalupnik, Izabela Chmielewska, Magdalena Dlugosz, Piotr Szajerski, Nguyen Dinh Chau, Paulina Krakowska, Tomasz Pliszczynski, Jakub Osko, Malgorzata Dymecka, Daria Mazurek
Article
Energy & Fuels
Jadwiga A. Jarzyna, Stanislaw Baudzis, Miroslaw Janowski, Edyta Puskarczyk
Summary: Examples from the Polish clastic and carbonate reservoirs were used to demonstrate the potential of well logging in geothermal resource recognition and characterization. The study focused on determining petrophysical parameters such as porosity, permeability, and mineral composition using various well logs, as well as the usefulness of spectral gamma-ray and temperature logs in radiogenic heat calculation and heat flux modelling. Advanced imaging and acoustic logs provided continuous information on natural and induced fracturing of formation, contributing to improved lithology recognition.
Article
Energy & Fuels
Paulina Krakowska-Madejska, Edyta Puskarczyk, Magdalena Habrat, Pawel Madejski, Marek Dohnalik, Mariusz Jedrychowski
Summary: Computed X-ray tomography and permeability methods were used to evaluate a formula for absolute reservoir permeability through studying 62 core samples. Geometrical parameters of pore space were found to be crucial for the estimation of absolute permeability.
Article
Energy & Fuels
Marek Stadtmuller, Paulina Krakowska-Madejska, Grzegorz Lesniak, Jadwiga A. Jarzyna
Summary: This article presents a novel methodology for data integration involving laboratory data, standard well logging measurements, and XRMI imager data for determining the porosity and permeability of fracture system in carbonate rock. An example of micro computed tomography results on carbonate rock is included. The methodology includes analysis of macrofractures based on borehole wall imagery and comparison of permeability determination results with drill stem tests.
Article
Energy & Fuels
Kamila Wawrzyniak-Guz, Jadwiga A. Jarzyna, Krzysztof Pieniadz, Krzysztof Starzec
Summary: The appropriate velocity model from well logs is crucial for seismic data processing and interpretation. In a deep borehole in the central part of the Polish Outer Carpathians, multiple regression and a modified Faust equation were successfully used to model the velocity log. Multiple regression estimated P-wave slowness based on sets of various logs, while the modified Faust method computed P-wave velocity using shallow resistivity logs and other data.
Article
Energy & Fuels
Sebastian Waszkiewicz, Paulina Krakowska-Madejska
Summary: This paper presents a method for estimating improved maturity indicator using well logs, grouping data using cluster and neural network analysis, and utilizing resistivity log to enhance the obtained maturity indicator. The approach proved to be reliable in testing on two wells with different type and maturity of kerogen, resulting in satisfactory results that allow for potential use in formations with low organic matter content.
Article
Engineering, Petroleum
Katarzyna Drabik, Paulina Krakowska-Madejska, Edyta Puskarczyk, Marek Dohnalik
Summary: The study assessed the usefulness of quantitative interpretation of CT images of rock pores for estimating reservoir parameters, finding significant linear relationships between CT image analysis parameters and other research methods. The results allowed for estimation of petrophysical parameters based solely on the CT method, providing a valuable tool for preliminary assessment of porosity and permeability in cores.
Article
Engineering, Environmental
E. Puskarczyk, P. Krakowska-Madejska, M. Dohnalik, I Jelonek
Summary: The influence of coal petrographic parameters on geomechanical tests was investigated through the analysis of two coal samples from the Polish Upper Silesian Coal Basin. The results indicated a relationship between geomechanical properties and the sum of reactive and inert macerals.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Environmental Sciences
Paulina Krakowska-Madejska
Summary: New parameters are proposed to evaluate the filtration properties of rocks obtained from X-ray computed tomography images. The global average pore connectivity, average blind pore connectivity, and blind pore coefficient are important indicators for assessing the filtration properties of the rocks. These parameters were found to have a high consistency with the traditional Euler characteristic and coordination number.
GEOLOGY GEOPHYSICS AND ENVIRONMENT
(2022)
Article
Geology
Jadwiga A. Jarzyna, Paulina Krakowska-Madejska, Edyta Puskarczyk, Kamila Wawrzyniak-Guz
Summary: This paper presents findings from a study on the petrophysical properties of the Silurian and Ordovician shale gas formations in the Baltic Basin. The study examines the relationships between laboratory and well log-derived data and provides a comprehensive characterization of the formations to support arguments about their heterogeneity.
Article
Engineering, Petroleum
Marek Dohnalik, Konrad Ziemianin
