mean diffusivity
Differential Diagnosis of Normal Pressure Hydrocephalus by MRI Mean Diffusivity Histogram Analysis
... intracranial mean diffusivity histograms that separates brain and ventricular components from a third component composed mostly of partial volume ...
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Mean Diffusivity and Fractional Anisotropy Histograms of Patients with Multiple Sclerosis
... the mean diffusivity (D ¯ ) (equal to one third of the trace of the diffusion tensor), which is a measure of the average molec- ular motion independent of any tissue directionality and is affected by ...
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Elevated Mean Diffusivity in the Left Hemisphere Superior Longitudinal Fasciculus in Autism Spectrum Disorders Increases with More Profound Language Impairment
... Eighty-four subjects were enrolled in the study. Subjects with ASD were recruited through the Regional Autism Center at the Children’s Hospital of Philadelphia. All had a prior diagnosis of ASD that was confirmed by an ...
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Role of Subvoxel Free Fluid on Diffusion Parameters in Brain Tissue with Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy and Its Correlation with Physical Disability: Histogram Analysis of Standard and Fluid Attenuated MR Diffusion
... Peak locations for normal appearing brain tissue with CADASIL were significantly higher on standard compared with fluid-attenuated images, whereas they did not differ significantly for the normal brains (Ta- ble 1). ...
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Meta Analysis of Diffusion Metrics for the Prediction of Tumor Grade in Gliomas
... FIG 1. Effects of tumor grade on minimum mean diffusivity and ⌬ fractional anisotropy. Moderator analysis was performed (A and B) with respect to tumor grade. In forest plots (A and B), the left column ...
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Differentiating Tumor Progression from Pseudoprogression in Patients with Glioblastomas Using Diffusion Tensor Imaging and Dynamic Susceptibility Contrast MRI
... tumor). Mean diffusivity, fractional anisotropy, linear anisotropy coefficient, planar anisotropy coefficient, spheric anisotropy coefficient, and maximum relative cerebral blood volume values were measured ...
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Effects of Number of Diffusion Gradient Directions on Derived Diffusion Tensor Imaging Indices in Human Brain
... of mean (SEM) were calculated and compared in 6 regions of interest (ROIs) for mean diffusivity ( 具 D 典 ), fractional anisotropy (FA), diffusion tensor eigenvalues ( 1 , 2 , and 3 ), and ...
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A Whole Brain Analysis in De Novo Parkinson Disease
... and mean diffusivity and FA histogram data in patients and controls are detailed in Tables 2– 4 and shown in Fig ...histogram-derived mean diffusiv- ity metrics between controls and the whole group ...
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Interhemispheric Asymmetry of Brain Diffusivity in Normal Individuals: A Diffusion Weighted MR Imaging Study
... bilateral diffusivity for the structure of interest (54, ...thalamic diffusivity in subjects 20 –29 years of age, right greater than left thalamic diffusivity in subjects 30 –59 years of age, and ...
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Diffusion Tensor Imaging–Demonstrated Differences between Hemiplegic and Diplegic Cerebral Palsy with Symmetric Periventricular Leukomalacia
... asymmetric mean diffusivity index to investigate degrees of asymmetry between the right and left ...asymmetric mean diffusivity index values were higher in hemiplegic patients than in ...
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Diffusion kurtosis imaging allows the early detection and longitudinal follow-up of amyloid-β-induced pathology
... axial diffusivity, radial diffu- sivity (RD), mean diffusivity (MD) and fractional anisotropy (FA) were computed from the diffusion ten- sor, and further refered to as diffusion tensor (DT) met- ...
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Diffusion tensor imaging with direct cytopathological validation: characterisation of decorin treatment in experimental juvenile communicating hydrocephalus
... the mean diffusivity, fractional anisotropy, radial and axial diffusivity of seven cerebral regions were assessed by voxel-based analysis in the corpus callosum, periventricular white matter, caudal ...
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Diffusion Tensor Imaging in Multiple Sclerosis: Assessment of Regional Differences in the Axial Plane within Normal Appearing Cervical Spinal Cord
... Image Processing. Quantitative analysis of DTI data were per- formed using Leonardo VD10B software on a Syngo VX49B imag- ing software platform (Siemens Medical Solutions, Erlangen, Ger- many). DTI maps were generated by ...
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High Fractional Anisotropy in Brain Abscesses versus Other Cystic Intracranial Lesions
... low mean diffusivity (3, 5, ...low diffusivity, we observed high FA in some part of the abscess cavity with orientation on the principal eigenvector maps in all of these ...low mean ...
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Serial Proton MR Spectroscopy and Diffusion Imaging Findings in HIV Related Herpes Simplex Encephalitis
... the mean diffusivity elevations compared with reported regional mean diffusivity of subacute PML lesions (5), probably reflecting differences in the severity of individual tissue reaction ...
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Diffusion Tensor Imaging of the Hippocampal Formation in Temporal Lobe Epilepsy
... HF mean diffusivity and FA measure- ments ipsilateral with the epileptogenic side to the measure- ments in the contralateral ...left-right diffusivity and FA indices of the patient group and compared ...
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Cognitive and White Matter Tract Differences in MS and Diffuse Neuropsychiatric Systemic Lupus Erythematosus
... of diffusivity in the ...increased mean diffusivity (MD) values (measures of WM tract integrity) compared with patients with NPSLE and that patients with MS and those with NPSLE would have ...
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Variation in Anisotropy and Diffusivity along the Medulla Oblongata and the Whole Spinal Cord in Adolescent Idiopathic Scoliosis: A Pilot Study Using Diffusion Tensor Imaging
... BACKGROUND AND PURPOSE: Disturbed somatosensory evoked potentials have been demonstrated in patients with adolescent idiopathic scoliosis (but this functional delay was found to originate above the C5– 6 level, while the ...
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Diagnostic Utility of Diffusion Tensor Imaging in Differentiating Glioblastomas from Brain Metastases
... in mean diffusivity between the 2 tumor ...and mean diffusivity from the enhancing regions differentiated glioblastomas from brain metastases with an area under the receiver operating ...
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Abnormal auditory and language pathways in children with 16p11.2 deletion
... Diffusion MR was acquired with a 2 mm isotropic resolution which introduces partial volume effects. The voxels may overlap two adjacent white matter tracts or contain fi bers crossing on the microscopic level. Both the ...
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