Results 11 to 20 of about 436,409 (287)
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
openaire +7 more sources
Seismic anisotropy in siliciclastic reservoir rocks [PDF]
, 2006 The interpretation of geophysical field measurements of seismic anisotropy is presently limited by our knowledge of the controls of the elastic anisotropy of sedimentary rocks in the subsurface. Traditionally, laboratory ultrasonic velocity measurements
Maddock, Jamie Stewart
core +7 more sources
Fractional calculus of periodic distributions [PDF]
, 2011 Two approaches for defining fractional derivatives of periodic distributions are presented. The first is a distributional version of the Weyl fractional derivative in which a derivative of arbitrary order of a periodic distribution is defined via Fourier
Lamb, Wilson +5 more
core +4 more sources
The Correlation of Reduced Fractional Anisotropy in the Cingulum With Suicide Risk in Bipolar Disorder [PDF]
Frontiers in Psychiatry, 2021 Neil Roberts +2 more
exaly +2 more sources
Fractional transformations of generalised functions [PDF]
, 2009 A distributional theory of fractional transformations is developed. A constructive approach, based on the eigenfunction expansion method pioneered by A. H.
Lamb, Wilson +2 more
core +4 more sources
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
openaire +2 more sources
Housing quality and behavior affect brain health and anxiety in healthy Japanese adults
Scientific Reports, 2021 Countless studies in animals have shown how housing environments and behaviors can significantly affect anxiety and brain health, giving valuable insight as to whether this is applicable in the human context.
Juan Cesar D. Pineda +3 more
doaj +1 more source
Acta Radiologica Open, 2021 Background Diffusion tensor imaging has emerged as a promising tool for quantitative analysis of neuronal damage in Parkinson disease, with potential value for diagnostic and prognostic evaluation.
Romulo V de Oliveira, João S Pereira
doaj +1 more source
Journal of Integrative Neuroscience, 2021 This paper investigates whether diffusion tensor imaging performed within 2 weeks of intracerebral hemorrhage onset could predict the motor outcome by categorizing previous diffusion tensor imaging studies based on the time-point of performing ...
Min Cheol Chang +2 more
doaj +1 more source
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
openaire +2 more sources