Results 71 to 80 of about 6,599 (190)

Relationship Between Mean Kärger Model Water Exchange Rate and Intercellular Water Transition Rate

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To derive a quantitative relationship between the mean Kärger model (KM) water exchange rate and the mean intercellular water transition rate applicable to brain and other complex biological tissues. Theory and Methods The mean KM water exchange rate applies to any KM, accommodates an arbitrary number of compartments, and can be ...
Jens H. Jensen, Hunter G. Moss, Thorsten Feiweier, Andreana Benitez   +3 more
wiley   +1 more source

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

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

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

gKFA: a geometric framework for kurtosis fractional anisotropy

Scientific Reports
Diffusion kurtosis imaging (DKI) extends diffusion tensor imaging (DTI) by incorporating non-Gaussian diffusion effects through a fourth-order kurtosis tensor.
Sumit Kaushik, Avinash Bansal, Jan Kubíček, Martin Haváček, Amit Khairnar   +4 more
doaj   +1 more source

Diffusion kurtosis imaging and conventional diffusion weighted imaging to assess electrochemotherapy response in locally advanced pancreatic cancer

Radiology and Oncology, 2019
The aim of the study was to evaluate diagnostic performance of functional parameters derived by conventional mono-exponential approach of diffusion weighted imaging (DWI) and by diffusion kurtosis imaging (DKI) in the assessment of pancreatic tumours ...
Granata Vincenza, Fusco Roberta, Setola Sergio Venanzio, Palaia Raffaele, Albino Vittorio, Piccirillo Mauro, Grimm Robert, Petrillo Antonella, Izzo Francesco   +8 more
doaj   +1 more source

Influence of Surface Roughness and Temperature on Niobium Cathodic Cage Duplex Treatment Applied to VP20TS Steel

steel research international, EarlyView.
Niobium cathodic cage duplex treatment is applied to VP20TS steel to evaluate the influence of surface roughness and temperature on coating performance. Results show that higher temperatures promote thicker nitride layers and increased microhardness, while finer surface preparation enhances adhesion and wear resistance, revealing optimal conditions for
Alan Bruno Costa Cardoso, Ediones Maciel de Sousa, João Rodrigues de Barros Neto, Leandro Almeida Silva, Luciana Sgarbi Rossino, Rômulo Ribeiro Magalhães de Sousa, Marcos Guilherme Carvalho Braulio Barbosa   +6 more
wiley   +1 more source

Diffusion Kurtosis Imaging of Microstructural Changes in Gray Matter Nucleus in Parkinson Disease

Frontiers in Neurology, 2020
Objective: To explore the microstructural damage of extrapyramidal system gray matter nuclei in Parkinson disease (PD) using diffusion kurtosis imaging (DKI).Materials and Methods: We enrolled 35 clinically confirmed PD patients and 23 healthy volunteers.
Gao Bingbing, Zhou Yujing, Miao Yanwei, Dong Chunbo, Wang Weiwei, Tian Shiyun, Liu Yangyingqiu, Shang Jin, Song Qingwei, Liu Ailian, Xie Lizhi   +10 more
doaj   +1 more source

Diffusion kurtosis imaging for different brain masses characterization

The Egyptian Journal of Radiology and Nuclear Medicine
Background Diffusion kurtosis imaging is an advanced magnetic resonance imaging technique that reveals additional information on the microstructure and micro-dynamics of different brain masses without the need for contrast agents.
Reem M. Abdelnasser, Aya AbdelGaleel, Ahmed H. Farhoud, Yasser Mazloum, M. Ihab Reda   +4 more
doaj   +1 more source

Wavefront sensing at a high‐repetition‐rate X‐ray free‐electron laser

Journal of Synchrotron Radiation, EarlyView.
We demonstrate a fast, robust and sensor‐free approach to X‐ray speckle tracking that enables shot‐to‐shot wavefront characterization at high‐repetition‐rate X‐ray free‐electron lasers. Our measurements reveal a hierarchy of wavefront fluctuations indicative of instabilities in the accelerator and beamline optics at the European XFEL.Wavefront ...
Trey Guest, Patrik Vagovič, Luigi Adriano, Johan Bielecki, Sarlota Birnsteinova, Rita Graceffa, Jayanath Koliyadu, Kaye Morgan, Hiiro Moriyama, Daniel Mosko, Grant van Riessen, Kristian Sabol, Tokushi Sato, Peter Szeles, Zane Taylor, Jozef Uličný, Richard Bean, Adrian P. Mancuso, Brian Abbey   +18 more
wiley   +1 more source