Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Probabilistic tractography"”.
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Alpha thalamocortical networks during propofol general anesthesia and disorders of consciousness
… epilepsy and performed probabilistic tractography analysis of thalamocortical fibers in a matched cohort of healthy subjects. We found a posterior alpha network in recordings of clinical EEG and intracranial EEG that is lost during states of unconsciousness. We also found …
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Anatomically Informed Models of Functional Connectivity in the Brain
… cooperation among brain areas while exploiting probabilistic information about the presence of pathways that physically connect these areas. A statistical framework was developed for modeling spatiotemporal brain activation networks in a confirmatory fashion, and anatomical connectivity was …
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Simultaneous DTI and rs-fMRI using the navigated diffusion sequence
… Further comparisons of diffusion data made using probabilistic tractography and connectivity matrices showed overall small differences indicating that connections derived from the standard DTI, single nav and double nav protocols were overall similar. We have therefore shown a significant "proof …
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Validation of MRtrix tractography for clinical use
Tractography is a technique which uses non-invasive diffusion magnetic resonance imaging (dMRI) to model the structural connections of the brain in vivo. Since it is not known to what extent the exact positions of white matter tracts vary between individuals, and how scan parameters affect the …
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The neurostructural effects of prenatal exposure to methamphetamine in an infant population in the Western Cape
… and tensor parameters determined using AFNI. Probabilistic tractography defined white matter connections between target regions. For the first analysis, five major white matter networks (commissural, and bilateral projection and association networks) were defined between spherical targets. For …
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The connectivity fingerprints of the frontal eye field and the inferior frontal junction
… 56 unrelated subjects. Using a surface-based probabilistic tractography approach, I tracked streamlines ipsilaterally from the FEF and IFJ to regions of the dorsal and ventral visual streams on the native white matter surface parcellated using the atlas by Glasser et al. (2016). By contrasting …
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Cerebral mechanisms of breathlessness and its relief
… was also used to assess breathlessness. (iii)Probabilistic tractography was used to estimate the white fibre connectivity from the seed area (VIM) in the brain to brain regions of interest and to compare these in patients who responded differently in (ii). Results: (i) Healthy volunteers with …
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Preliminary evidence that prenatal maternal choline supplementation protects the white matter microstructure of infants born to heavy-drinking women
… into the DTI space and used as seeds for full probabilistic tractography. FA, AD and RD were extracted for each identified connection. Visual recognition memory scores on the Fagen test of Infant Intelligence (FTII) assessed at 12 months were also available for 34 participants. We examined …