Results 11 to 20 of about 47,117 (300)
FRACTIONAL ANISOTROPY OF THE FORNIX AND HIPPOCAMPAL ATROPHY IN ALZHEIMER’S DISEASE [PDF]
Frontiers in Aging Neuroscience, 2014 Decrease in the directionality of water diffusion measured with fractional anisotropy on diffusion tensor imaging has been linked to loss of myelin and axons in the white matter.
Kejal eKantarci
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Reduced fractional anisotropy in patients with major depressive disorder and associations with vascular stiffness [PDF]
NeuroImage: Clinical, 2017 Previous studies revealed several alterations of the cerebral white matter in patients with major depressive disorder. However, it is unknown if these alterations are associated with vascular changes in the brain and other body parts.
Marco Hermesdorf +5 more
doaj +2 more sources
A Novel Measure of Fractional Anisotropy Based on the Tensor Distribution Function [PDF]
, 2009 Fractional anisotropy (FA), a very widely used measure of fiber integrity based on diffusion tensor imaging (DTI), is a problematic concept as it is influenced by several quantities including the number of dominant fiber directions within each voxel, each fiber's anisotropy, and partial volume effects from neighboring gray matter.
Liang Zhan +8 more
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White matter integrity measured by fractional anisotropy correlates poorly with actual individual fiber anisotropy [PDF]
2009 IEEE International Symposium on Biomedical Imaging: From Nano to Macro, 2009 Fractional anisotropy (FA), a very widely used measure of fiber integrity based on diffusion tensor imaging (DTI), is a problematic concept as it is influenced by several quantities including the number of dominant fiber directions within each voxel, each fiber's anisotropy, and partial volume effects from neighboring gray matter.
Alex D. Leow +10 more
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Validation of double diffusion schemes of microscopic fractional anisotropy [PDF]
, 2015 Diffusion sequences with two diffusion encoding blocks have recently been proposed to allow model free characterization of microscopic diffusion anisotropy, i.e. diffusion anisotropy of the individual water compartments insensitive to their directional dispersion. For example, the d-PFG 5-design was shown to provide metrics of e.g.
Lundell, Henrik +5 more
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Binswanger's disease and quantitative fractional anisotropy [PDF]
Arquivos de Neuro-Psiquiatria, 2009 OBJECTIVE: To study the integrity of the white matter in Binswanger's disease (BD) patients with quantitative fractional anisotropy (DTI-FA). METHOD: Controls (12) and patients with BD (12) were included. Scans performed with MR (GE Signa Horizon/1.5T).
Engelhardt, Eliasz +7 more
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Attenuated Fractional Wave Equations With Anisotropy [PDF]
Journal of Vibration and Acoustics, 2014 This paper develops new fractional calculus models for wave propagation. These models permit a different attenuation index in each coordinate to fully capture the anisotropic nature of wave propagation in complex media. Analytical expressions that describe power law attenuation and anomalous dispersion in each direction are derived for these fractional
Mark M, Meerschaert, Robert J, McGough
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An Introduction to Kurtosis Fractional Anisotropy. [PDF]
AJNR Am J Neuroradiol, 2019 Neuroradiology and imaging-based diagnostics in general have a dire need for scan techniques with improved microstructural sensitivity for detection of subtle tissue alterations in early disease phases or for diagnostics of diseases that are currently simply radiologically invisible.
Hansen B.
europepmc +4 more sources
Fractional anisotropy in individuals with schizophrenia and their nonpsychotic siblings [PDF]
Psychiatry Research: Neuroimaging, 2015 Fractional anisotropy (FA) was examined in a priori selected fiber tracts in individuals with schizophrenia (n=25) and their non-psychotic siblings (n=29) versus controls (n=35). FA was reduced in a portion of the fornix in individuals with schizophrenia (although this did not survive correction for the number of tracts investigated).
Michael P, Harms +4 more
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Altered Fractional Anisotropy in Early Huntington's Disease [PDF]
Case Reports in Neurology, 2013 Huntington's disease (HD) is a dominantly inherited neurodegenerative disease best known for chorea. The disorder includes numerous other clinical features including mood disorder, eye movement abnormalities, cognitive disturbance, pendular knee reflexes, motor impersistence, and postural instability.
Silky Singh, Hasit Mehta, Robert Fekete
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