Results 71 to 80 of about 12,725 (195)

Four Directions, One Solution: Enabling Rapid Diffusion Tensor MRI for Ultra‐Low Field Using Deep Learning

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose This study revisits the tetrahedral encoding strategy originally proposed to accelerate Diffusion Tensor Magnetic Resonance Imaging (DT‐MRI) by reducing the requisite number of diffusion‐weighted measurements to four. We examine its practical limitations and explore how artificial intelligence (AI) can extend its utility. Specifically,
Joshua Mawuli Ametepe, James Gholam, Leandro Beltrachini, Mara Cercignani, Derek Kenton Jones   +4 more
wiley   +1 more source

Mapping topographic structure in white matter pathways with level set trees.

PLoS ONE, 2014
Fiber tractography on diffusion imaging data offers rich potential for describing white matter pathways in the human brain, but characterizing the spatial organization in these large and complex data sets remains a challenge. We show that level set trees-
Brian P Kent, Alessandro Rinaldo, Fang-Cheng Yeh, Timothy Verstynen   +3 more
doaj   +1 more source

The Flail Limb Syndrome

Muscle &Nerve, EarlyView.
ABSTRACT The flail limb syndrome is primarily a lower motor neuron disorder that initially affects proximal arm muscles (flail arm syndrome—FAS) or distal leg muscles (flail leg syndrome—FLS). Both were recognized early on (1886 for FAS and 1918 for FLS) as somewhat distinct from classic amyotrophic lateral sclerosis (ALS).
Mark B. Bromberg
wiley   +1 more source

In vivo Diffusion Tensor Magnetic Resonance Tractography of the Sheep Brain: An Atlas of the Ovine White Matter Fiber Bundles

Frontiers in Veterinary Science, 2019
Diffusion Tensor Magnetic Resonance Imaging (DTI) allows to decode the mobility of water molecules in cerebral tissue, which is highly directional along myelinated fibers.
Valentina Pieri, Marco Trovatelli, Marcello Cadioli, Davide Danilo Zani, Stefano Brizzola, Giuliano Ravasio, Fabio Acocella, Mauro Di Giancamillo, Luca Malfassi, Mario Dolera, Marco Riva, Marco Riva, Lorenzo Bello, Lorenzo Bello, Andrea Falini, Antonella Castellano   +15 more
doaj   +1 more source

Parallel Optimization of Fiber Bundle Segmentation for Massive Tractography Datasets [PDF]

2019 IEEE 16th International Symposium on Biomedical Imaging (ISBI 2019), 2019
We present an optimized algorithm that performs automatic classification of white matter fibers based on a multi-subject bundle atlas. We implemented a parallel algorithm that improves upon its previous version in both execution time and memory usage. Our new version uses the local memory of each processor, which leads to a reduction in execution time.
Andrea Vázquez, Narciso López-López, Nicole Labra, Miguel E. Figueroa, Cyril Poupon, Jean-François Mangin, Cecilia Hernández, Pamela Guevara   +7 more
openaire   +2 more sources

Directionality of longitudinal associations between frontostriatal structural connectivity and depressive symptoms in adolescent girls

Journal of Child Psychology and Psychiatry, EarlyView.
Background Individual differences in the structure and function of the frontostriatal reward network have been related to depression. However, there is a strong need for prospective, longitudinal studies aiming to understand the role of frontostriatal networks in depression in a developmental context.
Marjolein E.A. Barendse, Chris J. Machle, Rogier Kievit, Jennifer H. Pfeifer   +3 more
wiley   +1 more source

Clinical Applications for Diffusion MRI and Tractography of Cranial Nerves Within the Posterior Fossa: A Systematic Review

Frontiers in Neuroscience, 2019
Objective: This paper presents a systematic review of diffusion MRI (dMRI) and tractography of cranial nerves within the posterior fossa. We assess the effectiveness of the diffusion imaging methods used and examine their clinical applications.Methods ...
Jonathan Shapey, Jonathan Shapey, Jonathan Shapey, Sjoerd B. Vos, Sjoerd B. Vos, Sjoerd B. Vos, Tom Vercauteren, Robert Bradford, Shakeel R. Saeed, Shakeel R. Saeed, Shakeel R. Saeed, Sotirios Bisdas, Sebastien Ourselin   +12 more
doaj   +1 more source

Multi-Fiber Tractography Visualizations for Diffusion MRI Data

PLoS ONE, 2013
In recent years, several new diffusion MRI approaches have been proposed to explore microstructural properties of the white matter, such as Q-ball imaging and spherical deconvolution-based techniques to estimate the orientation distribution function.
Sjoerd B Vos, Max A Viergever, Alexander Leemans   +2 more
openaire   +4 more sources

Network‐level disconnectivity tracks poststroke depressive symptom improvement

Psychiatry and Clinical Neurosciences, EarlyView.
Aims Poststroke depression is the most common psychological condition following a stroke and can severely impact outcome. However, the neurobiological biomarkers associated with recovery of poststroke depression remain unclear. In this longitudinal observational study, we set out to investigate the effect of lesion‐induced focal damage and network ...
Aleksi J. Sihvonen, Sonia L. E. Brownsett, David A. Copland, Alistair Walsh, Stephen M. Davis, Geoffrey A. Donnan, Leeanne M. Carey   +6 more
wiley   +1 more source

Global tractography with embedded anatomical priors for quantitative connectivity analysis

Frontiers in Neurology, 2014
The main assumption of fiber-tracking algorithms is that fiber trajectories are represented by paths of highest diffusion, which is usually accomplished by following the principal diffusion directions estimated in every voxel from the measured diffusion ...
Alia eLemkaddem, Didrik eSkiöldebrand, Alessandro eDal Palú, Jean-Philippe eThiran, Jean-Philippe eThiran, Alessandro eDaducci, Alessandro eDaducci   +6 more
doaj   +1 more source