Results 81 to 90 of about 11,693 (198)

Quantitative susceptibility mapping to evaluate the early stage of Alzheimer's disease

NeuroImage: Clinical, 2017
The objective of this study was to evaluate susceptibility changes caused by iron accumulation in cognitive normal (CN) elderly, those with amnestic mild cognitive impairment (aMCI), and those with early state AD, and to compare the findings with gray ...
Hyug-Gi Kim, Soonchan Park, Hak Young Rhee, Kyung Mi Lee, Chang-Woo Ryu, Sun Jung Rhee, Soo Yeol Lee, Yi Wang, Geon-Ho Jahng   +8 more
doaj   +1 more source

QSM is an imaging biomarker for chronic glial activation in multiple sclerosis lesions

Annals of Clinical and Translational Neurology, 2021
Background Inflammation in chronic active lesions occurs behind a closed blood–brain barrier and cannot be detected with MRI. Activated microglia are highly enriched for iron and can be visualized with quantitative susceptibility mapping (QSM), an MRI ...
Kelly M. Gillen, Mayyan Mubarak, Calvin Park, Gerald Ponath, Shun Zhang, Alexey Dimov, Maya Levine‐Ritterman, Steven Toro, Weiyuan Huang, Stephanie Amici, Ulrike W. Kaunzner, Susan A. Gauthier, Mireia Guerau‐de‐Arellano, Yi Wang, Thanh D. Nguyen, David Pitt   +15 more
doaj   +1 more source

Quantitative Susceptibility Mapping (QSM) Algorithms: Mathematical Rationale and Computational Implementations [PDF]

IEEE Transactions on Biomedical Engineering, 2017
Quantitative susceptibility mapping (QSM) solves the magnetic field-to-magnetization (tissue susceptibility) inverse problem under conditions of noisy and incomplete field data acquired using magnetic resonance imaging. Therefore, sophisticated algorithms are necessary to treat the ill-posed nature of the problem and are reviewed here.
Youngwook Kee, Zhe Liu, Liangdong Zhou, Alexey Dimov, Junghun Cho, Ludovic de Rochefort, Jin Keun Seo, Yi Wang   +7 more
openaire   +3 more sources

Assessment of Optimal T1/T2‐Weighted Combinations for Myelin Sensitivity: Effects of Echo Time and Exponents

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose The aim of this study is to improve the traditional T1‐weighted (T1w) over T2‐weighted (T2w) ratio as a proxy for myelin by investigating the optimal T2w TE and combination of exponent‐weighted T1w and T2w images (T1wx1/T2wx2$$ \mathrm{T}1{\mathrm{w}}^{x_1}/\mathrm{T}2{\mathrm{w}}^{x_2} $$).
Simone Monachino, Gerhard S. Drenthen, Lis J. M. van den Boogaard, Marcel Breeuwer, Catarina Dinis Fernandes, Oliver H. H. Gerlach, Svitlana Zinger, Jacobus F. A. Jansen   +7 more
wiley   +1 more source

A pilot study assessing the clinical utility of deep learning-reconstructed 3D-echo-planar-imaging-based quantitative susceptibility mapping in multiple sclerosis

Frontiers in Neuroscience
BackgroundQuantitative susceptibility mapping (QSM) has emerged as a promising paraclinical tool in multiple sclerosis (MS). This retrospective pilot study aims to evaluate whether a recently proposed deep learning-assisted, k-space-operating ...
Dimitrios G. Gkotsoulias, Dimitrios G. Gkotsoulias, Dimitrios G. Gkotsoulias, Matthias Weigel, Matthias Weigel, Matthias Weigel, Matthias Weigel, Alessandro Cagol, Alessandro Cagol, Alessandro Cagol, Alessandro Cagol, Nina de Oliveira Soares Siebenborn, Esther Ruberte, Esther Ruberte, Esther Ruberte, Josef Pfeuffer, Cristina Granziera, Cristina Granziera, Cristina Granziera   +18 more
doaj   +1 more source

Integrating terrestrial and canopy laser scanning for comprehensive analysis of large old trees: Implications for single tree and biodiversity research

Remote Sensing in Ecology and Conservation, EarlyView.
Canopy laser scanning (CLS) enhances 3D measurements of large trees by lifting laser scanners into the canopy. Combining CLS with terrestrial laser scanning improves point cloud precision, reduces occlusion and enables detailed assessments of tree architecture and canopy biodiversity, opening new opportunities for forest ecology.
Barbara D'hont, Kim Calders, Alexandre Antonelli, Thomas Berg, Wout Cherlet, Karun Dayal, Olivia Jayne Fitzpatrick, Leonard Hambrecht, Maurice Leponce, Arko Lucieer, Olivier Pascal, Pasi Raumonen, Hans Verbeeck   +12 more
wiley   +1 more source

Bidirectional genetic and phenotypic links between smoking and striatal iron content involving dopaminergic and inflammatory pathways

Addiction, EarlyView.
Abstract Background and aims Tobacco smoking is a major risk factor for cardiovascular and lung diseases. A better understanding of its neurobiological underpinnings will benefit the prevention of smoking‐related illnesses and mortality. Previous studies link smoking to increased iron concentration in the striatum, a central component of the brain's ...
Olga Trofimova, Ilaria Iuliani, Sven Bergmann   +2 more
wiley   +1 more source

Sustainability Reporting in Higher Education: A Systematic Review and Bibliometric Analysis for Strategic Decision‐Making

Business Ethics, the Environment &Responsibility, EarlyView.
ABSTRACT The communication of sustainable development is essential for higher education institutions (HEIs), which voluntarily prepare sustainability reports (SRs) to demonstrate commitment and inform strategic decision‐making. This study conducts a systematic literature review (SLR) to identify and analyze the challenges associated with implementing ...
Valerio Brescia, Lorenzo Coronella, Silvana Secinaro, Alessandro Mechelli   +3 more
wiley   +1 more source

Laboratory Tests of Low Density Astrophysical Equations of State

, 2012
Clustering in low density nuclear matter has been investigated using the NIMROD multi-detector at Texas A&M University. Thermal coalescence modes were employed to extract densities, $\rho$, and temperatures, $T$, for evolving systems formed in collisions
Barbui, M., Bonasera, A., Chen, Z., Cinausero, M., El Masri, Y., Fabris, D., Hagel, K., Huang, M., Keutgen, T., Kowalski, S., Lunardon, M., Ma, Y. G., Majka, Z., Moretto, S., Natowitz, J. B., Nebbia, G., Pesente, S., Prete, G., Qin, L., Rizzi, V., Rodrigues, M. R. D., Röpke, G., Schmidt, K., Shlomo, S., Typel, S., Viesti, G., Wada, R., Wang, J., Zheng, H.   +28 more
core   +1 more source

Quantitative susceptibility mapping (QSM) evaluation of infantile neuroaxonal dystrophy

BJR|case reports, 2019
We present the first case of twins with infantile neuroaxonal dystrophy evaluating brain iron deposition using quantitative susceptibility mapping (QSM). A 6-year-old boy who was normal at birth had psychomotor regression and hypotonia from 2-years-old.
Fujiwara, Takuya, Watanabe, Yoshiyuki, Tanaka, Hisashi, Takahashi, Hiroto, Nabatame, Shin, Yi, Wang, Tomiyama, Noriyuki   +6 more
openaire   +2 more sources