Results 221 to 230 of about 90,345 (262)

Increased Brain Apparent Diffusion Coefficient in Tuberous Sclerosis

Radiology, 2004
To evaluate the water diffusivity of normal-appearing white matter (NAWM) in patients with tuberous sclerosis complex compared with that in control subjects.Diffusion and conventional magnetic resonance (MR) imaging examinations were performed in 18 patients with clinically established tuberous sclerosis complex (10 male and eight female patients; mean
GARACI, FRANCESCO, FLORIS, ROBERTO, Bozzao,A, MANENTI, GUGLIELMO, SIMONETTI, ALESSANDRA, Lupattelli,T, CURATOLO, PAOLO, SIMONETTI, GIOVANNI MARIA EGISTO   +7 more
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Apparent Diffusion Coefficient Approximation and Diffusion Anisotropy Characterization in DWI

2005
We present a new approximation for the apparent diffusion coefficient (ADC) of non-Gaussian water diffusion with at most two fiber orientations within a voxel. The proposed model approximates ADC profiles by product of two spherical harmonic series (SHS) up to order 2 from High Angular Resolution Diffusion-weighted (HARD) MRI data.
Yunmei Chen, Weihong Guo 0002, Qingguo Zeng, Xiaolu Yan, Murali Rao, Yijun Liu   +5 more
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Usefulness of Testicular Volume, Apparent Diffusion Coefficient, and Normalized Apparent Diffusion Coefficient in the MRI Evaluation of Infertile Men With Azoospermia

American Journal of Roentgenology, 2018
The purpose of this article is to assess retrospectively the usefulness of testicular volume, apparent diffusion coefficient (ADC), and normalized ADC as measured using MRI in predicting the histopathologic grade of azoospermia and in differentiating obstructive from nonobstructive azoospermia.A computerized search generated a list of 30 infertile men ...
Byoung Hee, Han, Sung Bin, Park, Ju Tae, Seo, Yi Kyeong, Chun   +3 more
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Apparent Diffusion Coefficient Thresholds and Diffusion Lesion Volume in Acute Stroke

Journal of Stroke and Cerebrovascular Diseases, 2013
Apparent diffusion coefficient (ADC) thresholds are used to determine acute stroke lesion volume, but the reliability of this approach and comparability to the volume of the magnetic resonance diffusion-weighted imaging (MR-DWI) hyperintense lesion is unclear.We prospectively recruited and clinically assessed patients who had experienced acute ischemic
Ralph G R, Thomas, G Katherine, Lymer, Paul A, Armitage, Francesca M, Chappell, Trevor, Carpenter, Bartosz, Karaszewski, Martin S, Dennis, Joanna M, Wardlaw   +7 more
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Apparent diffusion coefficient measurements in progressive supranuclear palsy

Neuroradiology, 2000
We measured the apparent diffusion coefficient (ADC), using diffusion-weighted imaging (DWI) and signal intensity on T2-weighted MRI in the cerebral white matter of patients with progressive supranuclear palsy (PSP) and age-matched normal subjects.
T, Ohshita, M, Oka, Y, Imon, S, Yamaguchi, Y, Mimori, S, Nakamura   +5 more
openaire   +2 more sources

Multi-component apparent diffusion coefficients in human brain

NMR in Biomedicine, 1999
The signal decay with increasing b-factor at fixed echo time from brain tissue in vivo has been measured using a line scan Stejskal-Tanner spin echo diffusion approach in eight healthy adult volunteers. The use of a 175 ms echo time and maximum gradient strengths of 10 mT/m allowed 64 b-factors to be sampled, ranging from 5 to 6000 s/ mm2, a maximum ...
R V, Mulkern, H, Gudbjartsson, C F, Westin, H P, Zengingonul, W, Gartner, C R, Guttmann, R L, Robertson, W, Kyriakos, R, Schwartz, D, Holtzman, F A, Jolesz, S E, Maier   +11 more
openaire   +2 more sources

The diagnostic value of biexponential apparent diffusion coefficients in myopathy

Journal of Neurology, 2016
To investigate the performance of a biexponential signal decay model using DWI in myopathies and to differentiate Polymyositis (PM)/Dermatomyositis (DM), Glycogen Storage Diseases (GSDs) and Muscular Dystrophies (MDs) utilizing diffusion-weighted imaging.
Jun, Ran, Yao, Liu, Dong, Sun, John, Morelli, Ping, Zhang, Gang, Wu, Yuda, Sheng, Ruyi, Xie, Xiaoli, Zhang, Xiaoming, Li   +9 more
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Correlating apparent diffusion coefficients with histopathologic findings on meningiomas

European Journal of Radiology, 2012
To determine whether the apparent diffusion coefficient (ADC) correlates with histopathologic findings and whether ADC values can be used to differentiate benign from atypical/malignant meningiomas.MR images were reviewed retrospectively in 138 patients with meningiomas treated between September 1997 and July 2003.
Bo, Yin, Li, Liu, Bi Yun, Zhang, Yu Xin, Li, Yuan, Li, Dao Ying, Geng   +5 more
openaire   +2 more sources

Effect of sampling on the estimation of the apparent coefficient of diffusion in MRI

2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2017
The Apparent Diffusion Coefficient (ADC) is a quantitative measure derived from MRI that is able to asses the amount of diffusion within living tissues. It is employed to characterize different diseases and to evaluate response to therapy. For ADC estimation, the diffusion signal needs to be sampled using a small number of values, presenting ...
Santiago Aja-Fernández, Oscar Pena-Nogales, Rodrigo de Luis García   +2 more
openaire   +1 more source

Meta-Analysis of Apparent Diffusion Coefficients in the Newborn Brain

Pediatric Neurology, 2009
Diffusion-weighted imaging and its quantitative apparent diffusion coefficient can assess severity in newborn hypoxic-ischemic injuries. A meta-analysis established normative values in term newborns, in comparison to those values in hypoxic-ischemic newborns with good versus poor outcomes.
Jacqueline S, Coats, Adam, Freeberg, Elaine G, Pajela, André, Obenaus, Stephen, Ashwal   +4 more
openaire   +2 more sources