Results 181 to 190 of about 23,380 (217)

Uncertainty in White Matter Fiber Tractography

2005
In this work we address the uncertainty associated with fiber paths obtained in white matter fiber tractography. This uncertainty, which arises for example from noise and partial volume effects, is quantified using a Bayesian modeling framework. The theory for estimating the probability of a connection between two areas in the brain is presented, and a
Ola, Friman, Carl-Fredrik, Westin
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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, Ling Ren, Ziyu Wen, Yi Xu, Gaolang Gong, Ningyi Xu, Huazhong Yang   +8 more
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DTI fiber tractography of human brain

Applied and Computational Engineering, 2023
DTI fiber tractography is a powerful tool for investigating the human brain's structural connectivity. It enables us to explore the complex network of fiber pathways that connect different regions of the brain and play a crucial role in its function. In this work, I used DWI(Diffusion-Weighted Imaging) data processing software (such as DiffusionToolkit,
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Reducing Model Uncertainty in Crossing Fiber Tractography

2021
Diffusion MRI (dMRI) tractography permits the non-invasive reconstruction of major white matter tracts, and is therefore widely used in neurosurgical planning and in neuroscience. However, it is affected by various sources of uncertainty. In this work, we consider the model uncertainty that arises in crossing fiber tractography, from having to select ...
Gruen, Johannes, Voort, Gemma Van Der, Schultz, Thomas   +2 more
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Tractography of Association Fibers Associated with Language Processing

Clinical Neuroradiology, 2015
Several major association fiber tracts are known to be part of the language processing system. There is evidence that high angular diffusion-based MRI is able to separate these fascicles in a constant way. In this study, we wanted to proof this thesis using a novel whole brain "global tracking" approach and to test for possible lateralization.Global ...
Egger, Karl, Yang, Shan, Reisert, Marco, Kaller, Christoph, Mader, Irina, Beume, Lena-Alexandra, Weiller, Cornelius, Urbach, Horst   +7 more
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Diffusion tensor fiber tractography of the olfactory tract

Magnetic Resonance Imaging, 2011
Magnetic resonance diffusion tensor imaging with fiber tracking is used for 3-dimensional visualization of the nervous system. Peripheral nerves and all cranial nerves, except for the olfactory tract, have previously been visualized. The olfactory tracts are difficult to depict with diffusion-weighted imaging due to the high sensitivity to ...
Mikael, Skorpil, Tyler, Rolheiser, Harold, Robertson, Anders, Sundin, Per, Svenningsson   +4 more
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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, null Hui Zhang, Suyash P. Awate, James C. Gee   +3 more
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Data-driven fiber tractography with neural networks

2018 IEEE 15th International Symposium on Biomedical Imaging (ISBI 2018), 2018
Elaborate expert modeling has been the predominant approach to fiber tractography. It attempts to invert the measurement process of diffusion-weighted MRI to reconstruct fibers. We present a purely data-driven neural network regression model for fiber tractography.
Viktor Wegmayr, Giacomo Giuliari, Stefan Holdener, Joachim Buhmann   +3 more
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Diffusion Tensor Imaging and Fiber Tractography

2009
Diffusion Tensor Imaging (DTI) is a magnetic resonance imaging (MRI) modality which can significantly improve our understanding of the brain structures and neural connectivity. DTI measures are thought to be representative of brain tissue microstructure and are particularly useful for examining organized brain regions, such as white matter tract areas.
Evanthia E. Tripoliti, Dimitrios I. Fotiadis, Konstantia Veliou   +2 more
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DT-MRI estimation, regularization and fiber tractography

2004 2nd IEEE International Symposium on Biomedical Imaging: Macro to Nano (IEEE Cat No. 04EX821), 2005
Diffusion tensor MRI probes and quantifies the anisotropic diffusion of water molecules in biological tissues, making it possible to non-invasively infer the architecture of the underlying structures. In this article, we present a set of new techniques for the estimation and regularization of diffusion tensors MRI datasets as well as a novel approach ...
R. Deriche, D. Tschumperle, C. Lenglet
openaire   +1 more source