Results 81 to 90 of about 7,745 (211)

Bias in MRI Measurements of Apparent Diffusion Coefficient and Kurtosis: Implications for Choice of Maximum Diffusion Encoding [PDF]

, 2019
Tissue water diffusion is non-Gaussian and the expressions used to calculate diffusion parameters are approximations which introduce systematic errors dependent on the maximum diffusion encoding, diffusion time, etc.
Johnson, Glyn, Gilani, Nima; id_orcid, Gilani, Nima   +2 more
core   +1 more source

Characterization of white matter alterations using diffusion kurtosis imaging in patients with amyotrophic lateral sclerosis

Brain and Behavior, 2023
Background To evaluate the degeneration of the corticospinal tract (CST) and corpus callosum (CC) in patients with motor neuron disease and upper motor neuron (UMN) dysfunction using diffusion kurtosis imaging (DKI).
Tanushka Anand, Abdullah Ishaque, Daniel Ta, Muhammad Umer Khan, Komal Bharti, Andrew Wu, Dennell Krebs, Christian Beaulieu, Peter Seres, Sanjay Kalra   +9 more
doaj   +1 more source

Whole-lesion histogram analysis of multiple diffusion metrics for differentiating lung cancer from inflammatory lesions

Frontiers in Oncology, 2023
BackgroundWhole-lesion histogram analysis can provide comprehensive assessment of tissues by calculating additional quantitative metrics such as skewness and kurtosis; however, few studies have evaluated its value in the differential diagnosis of lung ...
Jiaxin Li, Baolin Wu, Zhun Huang, Yixiang Zhao, Sen Zhao, Shuaikang Guo, Shufei Xu, Xiaolei Wang, Tiantian Tian, Zhixue Wang, Jun Zhou   +10 more
doaj   +1 more source

Dependence of the Extra‐Cellular Diffusion Coefficient on the Fractions of Neurites and Cell Bodies in Gray Matter

Magnetic Resonance in Medicine, EarlyView.
Purpose The dependence of the long‐time (tortuosity) limit of the extra‐cellular diffusivity on the intra‐cellular volume fraction is of fundamental importance for microstructure modeling. While such dependencies have been explored for the white matter, the tortuosity limit in gray matter is unknown due to complex cell composition and geometry. Here we
Hong‐Hsi Lee, Ali Abdollahzadeh, Hansol Lee, Ricardo Coronado‐Leija, Els Fieremans, Susie Y. Huang, Dmitry S. Novikov   +6 more
wiley   +1 more source

White Matter Abnormalities and Cognitive Deficit After Mild Traumatic Brain Injury: Comparing DTI, DKI, and NODDI

Frontiers in Neurology, 2022
White matter (WM) disruption is an important determinant of cognitive impairment after mild traumatic brain injury (mTBI), but traditional diffusion tensor imaging (DTI) shows some limitations in assessing WM damage.
Sihong Huang, Chuxin Huang, Mengjun Li, Huiting Zhang, Jun Liu, Jun Liu, Jun Liu   +6 more
doaj   +1 more source

Managing the SDG‐Aligned Energy Transition in OECD Countries: How Do Economic Growth, Income Inequality, and Environmental Protection Expenditures Impact Energy Transition?

Sustainable Development, EarlyView.
ABSTRACT In recent years, transition to renewable energy has emerged as a vital strategy for achieving sustainable development and reducing environmental degradation. Only when backed by a solid institutional and macroeconomic context can economic growth serve as a stimulus for the development of renewable energy.
Azad Erdem, Erick Okoth, Yasin Sogut, Nazli Demirtas   +3 more
wiley   +1 more source

Constrained diffusion kurtosis imaging using ternary quartics & MLE

, 2012
International audiencePurpose: Diffusion kurtosis imaging (DKI) is a recent improvement over diffusion tensor imaging that characterizes tissue by quantifying non-gaussian diffusion using a 3D fourth-order kurtosis tensor.
Tristan Milne, Milne, Tristan, Rachid Deriche, Deriche, Rachid, Aurobrata Ghosh, Ghosh, Aurobrata   +5 more
core   +1 more source

Erweiterte Anwendung der Diffusions-Kurtosis-Bildgebung

, 2021
Die Diffusions-Tensor-Bildgebung (DTI) zur Rekonstruktion und Visualisierung von Fasertrakten im Gehirn zählt mittlerweile zu den Standardverfahren in der klinischen Routine und der neurowissenschaftlichen Forschung. Aufgrund der vereinfachenden Annahme des zugrundliegenden Tensormodells - einer Gaußschen Verteilung der Diffusion - ist eine räumlich ...
openaire   +2 more sources

Exploring white matter microstructural alterations in mild cognitive impairment: a multimodal diffusion MRI investigation utilizing diffusion kurtosis and free-water imaging

Frontiers in Neuroscience
BackgroundMild Cognitive Impairment (MCI) is a transitional stage from normal aging to dementia, characterized by noticeable changes in cognitive function that do not significantly impact daily life.
Megan R. Nelson, Megan R. Nelson, Elizabeth G. Keeling, Elizabeth G. Keeling, Ashley M. Stokes, Maurizio Bergamino   +5 more
doaj   +1 more source

Approaching Gold‐Standard Sensitivity in a Portable and Versatile Gold Nanoprisms Thermoplasmonic Platform for Lateral Flow Detection of Biomolecules

Small, EarlyView.
This study presents a plasmonic thermal lateral flow (ThermoLFA) biosensor for ultrasensitive, early detection of biomolecules. By combining plasmonic gold nanoprisms (AuNPrs) and near‐infrared (NIR) laser activation, it enhances signal output beyond conventional LFAs.
Carlos Cuestas Ayllón, Alba Martín Barreiro, África García Barrientos, María Moros, Valeria Grazú Bonavía, Jesús Martínez de la Fuente   +5 more
wiley   +1 more source