Results 11 to 20 of about 372,517 (152)
Integration of fMRI and Probabilistic Tractography for Cerebral Network Analysis
3rd IEEE International Symposium on Biomedical Imaging: Macro to Nano, 2006., 2006 We present a data acquisition and analysis methodology for generating anatomical connectivity matrices using fMRI and diffusion MRI tractography. We describe a protocol for distortion-free, high spatial resolution diffusion MRI suitable for probabilistic tractography in the presence of complex fibre architecture and distortion-free, geometrically ...
Geoffrey J. M. Parker +4 more
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Validation of in vitro probabilistic tractography
NeuroImage, 2007 Diffusion weighted imaging (DWI) and tractography allow the non-invasive study of anatomical brain connectivity. However, a gold standard for validating tractography of complex connections is lacking. Using the porcine brain as a highly gyrated brain model, we quantitatively and qualitatively assessed the anatomical validity and reproducibility of in ...
Tim B. Dyrby +10 more
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Tract-specific statistics based on diffusion-weighted probabilistic tractography [PDF]
Communications Biology, 2022 Andrew Reid et al. use publicly available data to present a method for deriving tract-specific statistics based on diffusion-weighted MRI, based upon arbitrarily-defined regions of interest.
Andrew T. Reid +3 more
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Adaptive Multi-modal Particle Filtering for Probabilistic White Matter Tractography [PDF]
, 2013 Particle filtering has recently been introduced to perform probabilistic tractography in conjunction with DTI and Q-Ball models to estimate the diffusion information. Particle filters are particularly well adapted to the tractography problem as they offer a way to approximate a probability distribution over all paths originated from a specified voxel ...
Stamm, Aymeric +3 more
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Surgical and Radiologic Anatomy, 2015 The dorsolateral prefrontal cortex (DLPFC) is a cortical area involved in higher cognitive functions, and at the center of the pathophysiology of mental disorders such as depression and schizophrenia. Considering these major roles and the development of deep brain stimulation, the object of this study was to assess the patterns of connectivity of the ...
Le Reste, Pierre-Jean +4 more
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A Whole-Cortex Probabilistic Diffusion Tractography Connectome [PDF]
eneuro, 2020 Abstract The WU-Minn Human Connectome Project (HCP) is a publicly-available dataset containing state-of-art structural, functional, and diffusion-MRI for over a thousand healthy subjects. While the planned scope of the HCP included an anatomical connectome, resting-state functional-MRI forms the bulk of the HCP’s current connectomic ...
Burke Q. Rosen, Eric Halgren
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Evaluating a visualization of uncertainty in probabilistic tractography [PDF]
SPIE Proceedings, 2010 In this paper we evaluate a visualization approach for representing uncertainty information in probabilistic fiber pathways in the human brain. We employ a semi-transparent volume rendering method where probabilities of fiber tracts are conveyed by colors and opacities (cf. Figure 1). Anatomic orientation is provided by placing anatomic landmarks in
Anette von Kapri +5 more
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Distance‐dependent distribution thresholding in probabilistic tractography
Human Brain Mapping, 2022 Abstract Tractography is widely used in human studies of connectivity with respect to every brain region, function, and is explored developmentally, in adulthood, ageing, and in disease. However, the core issue of how to systematically threshold, taking into account the inherent differences in connectivity values for different track ...
Ya-Ning Chang +2 more
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An error analysis of probabilistic fibre tracking methods: average curves optimization [PDF]
, 2009 Fibre tractography using diffusion tensor imaging is a promising method for estimating the pathways of white matter tracts in the human brain. The success of fibre tracking methods ultimately depends upon the accuracy of the fibre tracking algorithms and
Ratnarajah, N. +3 more
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Anatomical priors for global probabilistic diffusion tractography [PDF]
2009 IEEE International Symposium on Biomedical Imaging: From Nano to Macro, 2009 We investigate the use of anatomical priors in a Bayesian framework for diffusion tractography. We compare priors that utilize different types of information on the white-matter pathways to be reconstructed. This information includes manually labeled paths from a set of training subjects and anatomical segmentation labels obtained from T1-weighted MR ...
Yendiki, Anastasia +5 more
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