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
Radiology, Nuclear Medicine & Medical Imaging
Guorong Wang, Yue Fang, Zhiwei Wang, Zhengyu Jin
Summary: The study quantitatively assessed local colonic wall thickening using dual-layer spectral detector computed tomography, and found that IC and NIC values can be used to identify LCWT caused by colon neoplasia with satisfactory diagnostic value.
ACADEMIC RADIOLOGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Xiyu Gao, Yi Yang, Sam Yang, Yalong Ma, Miao Chen
Summary: This study used synchrotron X-ray CT and data-constrained modelling to investigate the properties and evolution of pore networks of chalcopyrite-dominant agglomerates during leaching, revealing a strong dependence of copper recovery on the interior structures of agglomerates. Sufficient binding capacity was found to be essential for maintaining agglomerate structure.
Article
Radiology, Nuclear Medicine & Medical Imaging
Stephan Skornitzke, Neha Vats, Philipp Mayer, Hans-Ulrich Kauczor, Wolfram Stiller
Summary: This study provides a quantitative meta-analysis of pancreatic CT perfusion studies, investigating the choice of study parameters, the ability to differentiate pancreatic diseases quantitatively, and the influence of acquisition and reconstruction parameters on reported results. The results showed significant differences in perfusion measurements between different pathologies despite the heterogeneity of study parameters. Statistical analysis identified the most influential parameters for future optimization and standardization of acquisition protocols.
INSIGHTS INTO IMAGING
(2023)
Article
Materials Science, Characterization & Testing
Jianli Li, Yu-Shuang Yang, Haipeng Wang, Lingjie Yu, Keyu Liu, Jie Ma, Yadong Wei
Summary: The total organic carbon content and mineral phases of three Longmaxi Formation shale samples from different well depths were analyzed. Synchrotron-based multi-energy X-ray CT technology was used to acquire slices of these samples, and the three-dimensional distribution of porosity and mineral was derived using the data-constrained modeling method. The results showed similar characteristics in the distribution of connected regions size and connection probabilities of pore-organics for the three samples.
Article
Materials Science, Coatings & Films
B. A. Kahl, Y. S. Yang, C. C. Berndt, A. S. M. Ang
Summary: The porosity of ceramic coatings deposited by atmospheric plasma spray (APS) was evaluated using Data-Constrained Modelling (DCM) of X-ray Micro-Computed Tomography (X-ray mu-CT) datasets. The results from 3D analysis were compared to 2D porosity estimations. The DCM method accurately quantified the porosity of coatings and demonstrated the deficiencies of traditional 2D assessments.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Energy & Fuels
Yuejian Lu, Dameng Liu, Yidong Cai, Qian Li, Yingfang Zhou
Summary: Capillary forces play a crucial role in the gas/fluid behavior and fluid distribution in porous media, particularly in evaluating the pore-fracture characteristics of coal. Different stages of spontaneous imbibition process can reveal the fluid flow characteristics, while a low flow-back rate of fracturing fluid may lead to severe permeability damage in coal. The gas relative permeability of coal attenuates exponentially with imbibition time, showing the influence of capillary force based on fractal theory.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Review
Radiology, Nuclear Medicine & Medical Imaging
Cynthia H. McCollough, Kishore Rajendran, Shuai Leng
Summary: Computed tomography (CT) images are highly quantitative and display anatomic structures in 3D. They are used for various applications, such as 3D printing of anatomical models and radiation therapy treatment planning. CT numbers, derived from pixel intensity, represent the x-ray attenuation coefficient and are widely used for quantitative measurements. However, the dependence of CT numbers on x-ray beam spectra limits their robust application. This article reviews the challenges faced by CT and introduces the benefits of photon-counting detector (PCD) CT technology, such as multienergy capability and improved spatial resolution.
INVESTIGATIVE RADIOLOGY
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Leening P. Liu, Nadav Shapira, Andrew A. Chen, Russell T. Shinohara, Pooyan Sahbaee, Mitchell Schnall, Harold Litt, Peter B. Noel
Summary: This study compared the image characteristics of a first-generation dual-source photon-counting computed tomography (PCCT) and a dual-source dual-energy CT (DECT) scanner at ultra-low radiation dose levels. The results showed that PCCT had high precision in Hounsfield unit (HU) measurements at various radiation dose levels, outperforming DECT at low doses and significantly reducing electronic background noise.
EUROPEAN RADIOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Daiki Kido, Md. Mijanur Rahman, Tatsuya Takeguch, Kiyotaka Asakura
Summary: The CTS method is applied to the EXAFS analysis of PtRu bimetallic nanoparticles, enhancing the reliability of the analysis and including physical constraints.
Article
Radiology, Nuclear Medicine & Medical Imaging
Marco Fronda, Andrea Doriguzzi Breatta, Marco Gatti, Marco Calandri, Claudio Maglia, Laura Bergamasco, Dorico Righi, Riccardo Faletti, Paolo Fonio
Summary: Quantitative assessment of HCC wash-out based on preprocedural CECT is useful in predicting early CR after DEB-TACE, with DPAR showing the best discriminating ability. When DPAR is greater than or equal to 120 and accompanied by smooth lesion margins, relatively high CR rates are observed.
EUROPEAN RADIOLOGY
(2021)
Article
Engineering, Biomedical
Jin Hur, Dongjoon Kim, Yeong-Gil Shin, Ho Lee
Summary: Beam hardening in x-ray computed tomography (CT) leads to inaccurate artifact estimation, with current research primarily based on recursive CT reconstruction methods, which are computationally intensive. To address this issue, a constrained beam-hardening estimator is proposed, which efficiently provides a numerical solution by reconstructing two images only once during the entire process.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Yijie Fang, Wei Li, Xiaojun Chen, Keming Chen, Han Kang, Pengxin Yu, Rongguo Zhang, Jianwei Liao, Guobin Hong, Shaolin Li
Summary: The study demonstrates the successful application of deep learning in automatic identification of osteoporosis, osteopenia, and normal bone mineral density in CT images, achieving high correlation and agreement with quantitative computed tomography standards.
EUROPEAN RADIOLOGY
(2021)
Article
Engineering, Biomedical
Hyunjong Kim, Gyutaek Oh, Joon Beom Seo, Hye Jeon Hwang, Sang Min Lee, Jihye Yun, Jong Chul Ye
Summary: In this study, a novel multi-domain image translation network is proposed to convert CT images from different scan parameters and manufacturers into a unified style. This method addresses the challenge of quantitative evaluation of CT images from multi-site or longitudinal studies.
PHYSICS IN MEDICINE AND BIOLOGY
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Simon Lennartz, Anushri Parakh, Jinjin Cao, David Zopfs, Nils Grosse Hokamp, Avinash Kambadakone
Summary: The study investigates the inter-scan and inter-scanner variation of iodine concentration and attenuation in different DECT scanners, finding that the iodine concentration shows higher variation compared to attenuation values. This variation depends on the scanner pairs and organs assessed, highlighting the importance of acknowledging these differences in clinical and scientific DECT applications.
EUROPEAN RADIOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Seyedamir Tavakoli Taba, Benedicta D. Arhatari, Yakov I. Nesterets, Ziba Gadomkar, Sheridan C. Mayo, Darren Thompson, Jane Fox, Beena Kumar, Zdenka Prodanovic, Daniel Hausermann, Anton Maksimenko, Christopher Hall, Matthew Dimmock, Konstantin M. Pavlov, Darren Lockie, Masoumeh Gity, Andrew Peele, Harry M. Quiney, Sarah Lewis, Timur E. Gureyev, Patrick C. Brennan
Summary: This study aimed to optimize the experimental conditions of Propagation-based phase-contrast CT (PB-CT) for breast cancer imaging and found that it achieved higher image quality compared to conventional absorption-based CT (AB-CT) even at lower doses, potentially improving breast cancer diagnosis.
ACADEMIC RADIOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Seyedamir Tavakoli Taba, Patrycja Baran, Yakov I. Nesterets, Serena Pacile, Susanne Wienbeck, Christian Dullin, Konstantin Pavlov, Anton Maksimenko, Darren Lockie, Sheridan C. Mayo, Harry M. Quiney, Diego Dreossi, Fulvia Arfelli, Giuliana Tromba, Sarah Lewis, Timur E. Gureyev, Patrick C. Brennan
EUROPEAN RADIOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Majid Laleh, Anthony E. Hughes, Sam Yang, Jianli Li, Wei Xu, Ian Gibson, Mike Y. Tan
Article
Cardiac & Cardiovascular Systems
Yue Qu, David McGiffin, Christopher Hayward, Janelle McLean, Courtney Duncan, Desiree Robson, Christina Kure, Rong Shen, Helen Williams, Sherry Mayo, Helmut Thissen, Silvana Marasco, Adam Zimmet, Justin Negri, Paul Jansz, Kumud Dhital, David M. Kaye, Anton Y. Peleg
JOURNAL OF HEART AND LUNG TRANSPLANTATION
(2020)
Article
Engineering, Manufacturing
Majid Laleh, Anthony E. Hughes, Sam Yang, Jiangting Wang, Jianli Li, A. Matt Glenn, Wei Xu, Mike Y. Tan
Summary: Additive manufacturing has advantages in producing metallic parts, but defect formation remains a challenge. This study used electron microscopy and X-ray CT to reveal new insights into lack-of-fusion (LOF) pores, showing their complex structures and formation mechanisms. Spatter particles are the main source of LOF structures, which can only be eliminated by careful selection of processing parameters.
ADDITIVE MANUFACTURING
(2021)
Article
Chemistry, Multidisciplinary
Benedicta D. Arhatari, Andrew W. Stevenson, Brian Abbey, Yakov I. Nesterets, Anton Maksimenko, Christopher J. Hall, Darren Thompson, Sheridan C. Mayo, Tom Fiala, Harry M. Quiney, Seyedamir T. Taba, Sarah J. Lewis, Patrick C. Brennan, Matthew Dimmock, Daniel Hausermann, Timur E. Gureyev
Summary: IMBL is a beamline at the Australian Synchrotron that delivers hard X-rays for biomedical applications, including propagation-based X-ray phase-contrast computed tomography (PCT) for imaging low-density materials. The unique properties of synchrotron X-ray sources allow for high sensitivity phase-contrast imaging with short exposure times. Ongoing research aims to introduce innovative 3D X-ray medical imaging techniques to improve breast cancer detection and diagnosis.
APPLIED SCIENCES-BASEL
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Sarina Wan, Benedicta D. Arhatari, Yakov Nesterets, Sheridan C. Mayo, Darren Thompson, Jane Fox, Beena Kumar, Zdenka Prodanovic, Daniel Hausermann, Anton Maksimenko, Christopher Hall, Matthew Dimmock, Konstantin M. Pavlov, Darren Lockie, Mary Rickard, Ziba Gadomkar, Alaleh Aminzadeh, Elham Vafa, Andrew Peele, Harry M. Quiney, Sarah Lewis, Timur E. Gureyev, Patrick C. Brennan, Seyedamir Tavakoli Taba
Summary: This study investigated the relationship between X-ray energy and image quality in PB-CT imaging, with results showing that images produced at 30 keV had the highest quality, leading to improved contrast and potentially lower breast cancer mortality rates.
JOURNAL OF MEDICAL IMAGING
(2021)
Article
Food Science & Technology
Sumana Chakrabarti-Bell, Jonas Lukasczyk, Jie Liu, Ross Maciejewski, Xianghui Xiao, Sherry Mayo, Klaus Regenauer-Lieb
Summary: Using Synchrotron X-ray tomography, the study investigated how the growth and movement of gas bubbles in leavened and unleavened bread doughs of different flours are affected. It was found that bubbles were mobile in all doughs, with a higher rate of coalescence in leavened doughs. The study also compared the rate of coalescence between Australian Wylkatchem flour dough and Canadian Western Red Spring flour dough.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2021)
Article
Optics
S. J. Alloo, D. M. Paganin, K. S. Morgan, T. E. Gureyev, S. C. Mayo, S. Mohammadi, D. Lockie, R. H. Menk, F. Arfelli, F. Zanconati, G. Tromba, K. M. Pavlov
Summary: Propagation-based phase-contrast x-ray imaging (PB-PCXI) is a useful technique for imaging weakly attenuating samples, providing better contrast than conventional attenuation-based imaging. In this study, a PB-PCXI algorithm is proposed to extract the x-ray attenuation and refraction information of complex materials from an unknown sample, without prior information. The algorithm involves curve fitting an error-function-based model to a phase-retrieved interface, allowing for the calculation of true attenuation and refraction values.
Article
Radiology, Nuclear Medicine & Medical Imaging
Samantha J. Alloo, David M. Paganin, Kaye S. Morgan, Marcus J. Kitchen, Andrew W. Stevenson, Sheridan C. Mayo, Heyang T. Li, Ben M. Kennedy, Anton Maksimenko, Joshua C. Bowden, Konstantin M. Pavlov
Summary: This study investigates the extraction of an object's dark-field signal using intrinsic speckle tracking, demonstrating the ability to tomographically reconstruct the dark-field signal of a wood sample, enhancing phase-contrast reconstructions.
JOURNAL OF MEDICAL IMAGING
(2022)
Article
Computer Science, Interdisciplinary Applications
A. Aminzadeh, B. D. Arhatari, A. Maksimenko, C. J. Hall, D. Hausermann, A. G. Peele, J. Fox, B. Kumar, Z. Prodanovic, M. Dimmock, D. Lockie, K. M. Pavlov, Y. Nesterets, D. Thompson, S. C. Mayo, D. M. Paganin, S. T. Taba, S. Lewis, P. C. Brennan, H. M. Quiney, T. E. Gureyev
Summary: In this study, a method to improve the detection of microcalcifications in breast tissues using propagation-based phase-contrast X-ray computed tomography was proposed. The results showed that the visibility of microcalcifications in the dark-field images was more than two times higher compared to the bright-field images, and the dark-field images provided more accurate information about the size and shape of the microcalcifications.
IEEE TRANSACTIONS ON MEDICAL IMAGING
(2022)
Proceedings Paper
Optics
Belinda Lim, Sarah Lewis, Benedicta D. Arhatari, Yakov Nesterets, Sheridan Mayo, Darren Thomposon, Jane Fox, Beena Kumar, Daniel Hausermann, Anton Maksimenko, Christopher Hall, Matthew Dimmock, Darren Lockie, Mary Rickard, Nicola Giannotti, Andrew Peele, Harry Quiney, Timur E. Gureyev, Patrick Brennan, Seyedamir T. Taba
Summary: This study aims to determine the optimal x-ray energy for PB-CT images of breast mastectomy samples and investigate the correlation between objective physical measures of image quality and subjective human observer scores. The results suggest that 30-34 keV provides optimum image quality for breast PB-CT.
MEDICAL IMAGING 2022: PHYSICS OF MEDICAL IMAGING
(2022)
Proceedings Paper
Optics
S. J. Alloo, D. M. Paganin, K. S. Morgan, M. J. Kitchen, A. W. Stevenson, S. C. Mayo, H. T. Li, B. M. Kennedy, A. Maksimenko, J. Bowden, K. M. Pavlov
Summary: Spatial resolution in standard phase-contrast X-ray imaging is limited by the size and number of detector pixels. Dark-field imaging allows information about unresolved microstructures to be obtained through small-angle X-ray scattering. This paper utilizes speckle-tracking-based X-ray imaging to extract effective dark-field signal from a wood sample.
DEVELOPMENTS IN X-RAY TOMOGRAPHY XIII
(2021)
Proceedings Paper
Optics
Benedicta D. Arhatari, Yakov Nesterets, Seyedamir T. Taba, Anton Maksimenko, Christopher J. Hall, Andrew W. Stevenson, Daniel Hausermann, Sarah J. Lewis, Matthew Dimmock, Darren Thompson, Sheridan C. Mayo, Harry M. Quiney, Timur E. Gureyev, Patrick C. Brennan
Summary: The PB-CT technique utilizes high coherence and brightness of synchrotron X-ray sources, improving sensitivity to small density differences in soft tissues and tumors. It is expected to reduce radiation dose and enhance detection and diagnosis of breast cancer.
DEVELOPMENTS IN X-RAY TOMOGRAPHY XIII
(2021)
Proceedings Paper
Obstetrics & Gynecology
Seyedamir Tavakoli Taba, Sarah Lewis, Patrycja M. Baran, Benedicta D. Arhatari, Yakov Nesterets, Sherry C. Mayo, Darren Thompson, Jane Fox, Beena Kumar, Zdenka Prodanovic, Daniel Hausermann, Anton Maksimenko, Chris Hall, Matthew Dimmock, Konstantin M. Pavlov, Andrew Peele, Harry M. Quiney, Darren Lockie, Giuliana Tromba, Timur E. Gureyev, Patrick C. Brennan
15TH INTERNATIONAL WORKSHOP ON BREAST IMAGING (IWBI2020)
(2020)