Results 131 to 140 of about 372,517 (152)

Probabilistic Tractography of the Cranial Nerves in Vestibular Schwannoma

World Neurosurgery, 2017
Multiple recent studies have reported on diffusion tensor-based fiber tracking of cranial nerves in vestibular schwannoma, with conflicting results as to the accuracy of the method and the occurrence of cochlear nerve depiction. Probabilistic nontensor-based tractography might offer advantages in terms of better extraction of directional information ...
Gabriele Schackert, Dino Podlesek, Jennifer Linn   +2 more
exaly   +3 more sources

Using Probabilistic Tractography to Target the Subcallosal Cingulate Cortex in Patients With Treatment Resistant Depression [PDF]

Psychiatry Research - Neuroimaging, 2017
The lack of efficacy of deep brain stimulation (DBS) of subcallosal cingulate (SCC) in treatment resistant depression (TRD) may be due in part to suboptimal targeting.
Nader Pouratian, Evangelia Tsolaki, Randall T Espinoza   +2 more
exaly   +2 more sources

Probabilistic Brain Fiber Tractography on GPUs

2012 IEEE 26th International Parallel and Distributed Processing Symposium Workshops & PhD Forum, 2012
Diffusion Tensor Magnetic Resonance Imaging (DT-MRI) is an emerging technique that explores the structural connectivity of the human brain. The probabilistic fiber tractography based on DT-MRI data behaves more robustly than deterministic approaches in the presence of fiber crossings, but requires more prohibitive computational time.
Mo Xu, Xiaorui Zhang, Yu Wang 0002, Ling Ren 0001, Ziyu Wen, Yi Xu, Gaolang Gong, Ningyi Xu, Huazhong Yang   +8 more
openaire   +2 more sources

Logical Foundations and Fast Implementation of Probabilistic Tractography

IEEE Transactions on Medical Imaging, 2013
Although tractography can noninvasively map axonal pathways, current approaches are typically incomplete or computationally intensive. Fast, complete maps may serve as a useful clinical tool for assessing neurological disorders stemming from pathological anatomical connections such as epilepsy. We re-frame tractography in terms of logic and conditional
Myron Zhang, Ken E. Sakaie, Stephen E. Jones   +2 more
openaire   +2 more sources

Visualizing Meyer's Loop: A Comparison of Deterministic and Probabilistic Tractography

Epilepsy Research, 2014
Diffusion tensor tractography of the anterior extent of the optic radiation - Meyer's loop - prior to temporal lobe resection (TLR) may reduce the risk for postoperative visual field defect. Currently there is no standardized way to perform tractography.To visualize Meyer's loop using deterministic (DTG) and probabilistic tractography (PTG) at ...
Bertil Rydenhag, Kristina Malmgren, Maria Ljungberg   +2 more
exaly   +3 more sources

Fiber stippling: An illustrative rendering for probabilistic diffusion tractography

2011 IEEE Symposium on Biological Data Visualization (BioVis)., 2011
One of the most promising avenues for compiling anatomical brain connectivity data arises from diffusion magnetic resonance imaging (dMRI). dMRI provides a rather novel family of medical imaging techniques with broad application in clinical as well as basic neu-roscience as it offers an estimate of the brain's fiber structure completely non-invasively ...
Mathias Goldau, Alexander Wiebel, Nico S. Gorbach, Corina Melzer, Mario Hlawitschka, Gerik Scheuermann, Marc Tittgemeyer   +6 more
openaire   +1 more source

Importance Sampling Spherical Harmonics to Improve Probabilistic Tractography

2013 International Workshop on Pattern Recognition in Neuroimaging, 2013
We consider the problem of improving the accuracy and reliability of probabilistic white matter tractography methods by improving the built-in sampling scheme, which randomly draws, from a diffusion model such as the orientation distribution function (ODF), a direction of propagation.
Hasan Ertan Çetingül, Laura Dumont, Mariappan S. Nadar, Paul M. Thompson, Guillermo Sapiro, Christophe Lenglet   +5 more
openaire   +1 more source

BootGraph: Probabilistic Fiber Tractography Using Bootstrap Algorithms and Graph Theory

NeuroImage, 2013
Bootstrap methods have recently been introduced to diffusion-weighted magnetic resonance imaging to estimate the measurement uncertainty of ensuing diffusion parameters directly from the acquired data without the necessity to assume a noise model. These methods have been previously combined with deterministic streamline tractography algorithms to allow
Carolin Reischauer, Peter Boesiger
exaly   +5 more sources

Atlas-guided probabilistic diffusion-tensor fiber tractography

2008 5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, 2008
We demonstrate the use of a diffusion tensor atlas to perform probabilistic tractography in diffusion tensor data. The tensors from eleven subjects are normalized into a common space by optimizing the similarity between tensors explicitly. The distribution of tensor orientations in the atlas space forms a prior distribution for the fiber orientation ...
Philip A. Cook, Hui Zhang 0005, Suyash P. Awate, James C. Gee   +3 more
openaire   +1 more source

Symmetric Wiener Processes for Probabilistic Tractography and Connectivity Estimation

2015
Probabilistic tractography based on diffusion weighted MRI has become a powerful approach for quantifying structural brain connectivities. In several works the similarity of probabilistic tractography and path integrals was already pointed out. This work investigates this connection more deeply.
Marco Reisert, B. Dihtal, Elias Kellner, Henrik Skibbe, Christoph P. Kaller   +4 more
openaire   +1 more source