Results 41 to 50 of about 23,380 (217)

In vivo fiber tractography using DT-MRI data [PDF]

Magnetic Resonance in Medicine, 2000
Fiber tract trajectories in coherently organized brain white matter pathways were computed from in vivo diffusion tensor magnetic resonance imaging (DT-MRI) data. First, a continuous diffusion tensor field is constructed from this discrete, noisy, measured DT-MRI data. Then a Frenet equation, describing the evolution of a fiber tract, was solved.
P J, Basser, S, Pajevic, C, Pierpaoli, J, Duda, A, Aldroubi   +4 more
openaire   +2 more sources

In Vivo Tractography of Fetal Association Fibers

PLOS ONE, 2015
Association fibers connect different cortical areas within the same hemisphere and constitute an essential anatomical substrate for a diverse range of higher cognitive functions. So far a comprehensive description of the prenatal in vivo morphology of these functionally important pathways is lacking. In the present study, diffusion tensor imaging (DTI)
Christian Mitter, Daniela Prayer, Peter C Brugger, Michael Weber, Gregor Kasprian   +4 more
openaire   +3 more sources

Genetic white matter fiber tractography with global optimization [PDF]

Journal of Neuroscience Methods, 2009
Diffusion tensor imaging (DTI) tractography is a novel technique that can delineate the trajectories between cortical region of the human brain non-invasively. In this paper, a novel DTI based white matter fiber tractography using genetic algorithm is presented.
Xi, Wu, Qing, Xu, Lei, Xu, Jiliu, Zhou, Adam W, Anderson, Zhaohua, Ding   +5 more
openaire   +2 more sources

Topological organization of whole-brain white matter in HIV infection [PDF]

, 2017
Infection with human immunodeficiency virus (HIV) is associated with neuroimaging alterations. However, little is known about the topological organization of whole-brain networks and the corresponding association with cognition.
Baker, Laurie M, Cabeen, Ryan P, Cooley, Sarah A, Heaps-Woodruff, Jodi M, Hoare, Jacqueline, Joska, John A, Laidlaw, David H, Paul, Robert H, Salminen, Lauren E, Stein, Dan J   +9 more
core   +2 more sources

Improved fiber tractography with Bayesian tensor regularization

NeuroImage, 2006
Diffusion tensor tractography suffers from the effects of noise and partial volume averaging (PVA). For reliable reconstruction of fiber pathways, tracking algorithms that are robust to these artifacts are called for. To meet this need, the present study establishes a novel Bayesian regularization framework for fiber tracking that takes into account ...
Yonggang, Lu, Akram, Aldroubi, John C, Gore, Adam W, Anderson, Zhaohua, Ding   +4 more
openaire   +2 more sources

3D stochastic completion fields for fiber tractography [PDF]

2009 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops, 2009
We approach the problem of fiber tractography from the viewpoint that a computational theory should relate to the underlying quantity that is being measured - the diffusion of water molecules. We characterize the Brownian motion of water by a 3D random walk described by a stochastic non-linear differential equation.
Parya Momayyez, Kaleem Siddiqi
openaire   +1 more source

Altered structural and effective connectivity in anorexia and bulimia nervosa in circuits that regulate energy and reward homeostasis. [PDF]

, 2016
Anorexia and bulimia nervosa are severe eating disorders that share many behaviors. Structural and functional brain circuits could provide biological links that those disorders have in common.
Frank, GKW, Pryor, TL, Riederer, J, Shott, ME   +3 more
core   +1 more source

Diffusion tensor tractography of brainstem fibers and its application in pain.

PLoS ONE, 2020
Evaluation of brainstem pathways with diffusion tensor imaging (DTI) and tractography may provide insights into pathophysiologies associated with dysfunction of key brainstem circuits.
Yu Zhang, Andrei A Vakhtin, Jennifer S Jennings, Payam Massaband, Max Wintermark, Patricia L Craig, J Wesson Ashford, J David Clark, Ansgar J Furst   +8 more
doaj   +1 more source

Alterations in fiber pathways reveal brain tumor typology: a diffusion tractography study [PDF]

PeerJ, 2014
Conventional structural Magnetic Resonance (MR) techniques can accurately identify brain tumors but do not provide exhaustive information about the integrity of the surrounding/embedded white matter (WM).
Martina Campanella, Tamara Ius, Miran Skrap, Luciano Fadiga   +3 more
doaj   +2 more sources

Probing white-matter microstructure with higher-order diffusion tensors and susceptibility tensor MRI. [PDF]

, 2013
Diffusion MRI has become an invaluable tool for studying white matter microstructure and brain connectivity. The emergence of quantitative susceptibility mapping and susceptibility tensor imaging (STI) has provided another unique tool for assessing the ...
Li, Wei, Liu, Chunlei, Murphy, Nicole E
core   +1 more source