Results 11 to 20 of about 97,220 (199)

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   +5 more sources

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, Moreira, Denise Madeira, Alves, Gilberto Sousa, Lanna, Maria Elisa Oliveira, Alves, Carlos Eduardo de Oliveira, Ericeira-Valente, Letice, Sudo, Felipe Kenji, Laks, Jerson   +7 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
openaire   +3 more sources

Visualization of infarction using fractional anisotropy [PDF]

Journal of Cardiovascular Magnetic Resonance, 2010
Introduction Accurate localization of ischemia is crucial in diagnosis of myocardial disease. The zHARP[1] pulse sequence quantifies myocardial function by computing a three-dimensional strain tensor at each voxel, from which principal strain values and orientations can be computed.
Soleimanifard, Sahar, Abd-Elmoniem, Khaled Z, Agarwal, Harsh, Tomas, Miguel S, Sasano, Tetsuo, Vonken, Evertjan, Youssef, Amr, Abraham, M Roselle, Abraham, Theodore P, Prince, Jerry L   +9 more
openaire   +1 more source

White matter fractional anisotropy decreases precede hyperintensities in Alzheimer's disease. [PDF]

Cell Rep Med
The associations of β-amyloid (Aβ) and tau deposition with white matter (WM) degeneration in Alzheimer's disease (AD) remain inadequately elucidated. We investigate baseline and longitudinal changes of microstructural fractional anisotropy (FA) and macrostructural white matter hyperintensities (WMHs) and their relationships with Aβ and tau positron ...
Sun P, He Z, Chu E, Fan X, Cai Y, Lan G, Liu L, Shi D, Liang L, Yang J, Li A, Zhu Y, Zhou X, Fang L, Wang Y, Zhang L, Liu Z, Ma T, Alzheimer’s Disease Neuroimaging Initiative, Cheng G, Xu L, Guo T.   +21 more
europepmc   +3 more sources

Fractional quantum Hall states in two-dimensional electron systems with anisotropic interactions [PDF]

, 2012
We study the anisotropic effect of the Coulomb interaction on a 1/3-filling fractional quantum Hall system by using an exact diagonalization method on small systems in torus geometry. For weak anisotropy the system remains to be an incompressible quantum
D. Yoshioka, Fuchun Zhang, Hao Wang, Rajesh Narayanan, Xin Wan   +4 more
core   +2 more sources

Gray and White Matter Contributions to Cognitive Frontostriatal Deficits in Non-Demented Parkinson's Disease. [PDF]

PLoS ONE, 2016
OBJECTIVE:This prospective investigation examined: 1) processing speed and working memory relative to other cognitive domains in non-demented medically managed idiopathic Parkinson's disease, and 2) the predictive role of cortical/subcortical gray ...
Catherine C Price, Jared Tanner, Peter T Nguyen, Nadine A Schwab, Sandra Mitchell, Elizabeth Slonena, Babette Brumback, Michael S Okun, Thomas H Mareci, Dawn Bowers   +9 more
doaj   +1 more source

White matter disease correlates with lexical retrieval deficits in primary progressive aphasia

Frontiers in Neurology, 2013
Objective: To relate fractional anisotropy changes associated with the semantic and logopenic variants of primary progressive aphasia to measures of lexical retrieval.Methods: We collected neuropsychological testing, volumetric MRI, and diffusion ...
John P. Powers, Corey T. McMillan, Caroline C. Brun, Paul A. Yushkevich, Hui eZhang, James C. Gee, Murray eGrossman   +6 more
doaj   +1 more source

Diffusion tensor imaging and diffusion-weighted imaging on axillary lymph node status in breast cancer patients

Diagnostic and Interventional Radiology, 2022
PURPOSEThis article will examine the usefulness of diffusion tensor imaging (DTI) and diffusion-weighted imaging (DWI) on the assessment of axillary lymph nodes (ALN) of breast cancer patients.METHODSAxillary lymph nodes in 66 breast cancer patients were
Nazmi Kurt, Busem Binboga Kurt, Ugur Gulsaran, Burak Uslu, Ahmet Onur Celik, Necdet Sut, Ebru Tastekin, Derya Karabulut, Nermin Tuncbilek   +8 more
doaj   +1 more source