Results 261 to 270 of about 363,053 (298)

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

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
openaire   +2 more sources

Apparent diffusion coefficient in vasogenic edema and reactive astrogliosis

Neuroradiology, 2007
Distinguishing between vasogenic edema and reactive astrogliosis may be difficult in some instances. This study was performed to test the hypothesis that diffusion-weighted (DW) imaging with apparent diffusion coefficient (ADC) maps can be used to differentiate these two types of changes.The study population included 11 patients with perilesional ...
Thomas, Hagen, Frank, Ahlhelm, Werner, Reiche   +2 more
openaire   +2 more sources

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

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

Apparent Diffusion Coefficient in Breast MRI

ISMRM Annual Meeting
Diffusion weighted Imaging (DWI) acquisitions are often part of breast cancer MRI protocols. The signal intensity decrease as a function of the b-value in diffusion imaging is non-linear and complex with inconsistent Apparent Diffusion Coefficients. In this abstract, we investigate ADC mapping computation and accuracy.
Stephane Loubrie, Maren Andreassen, Ana Rodriguez-Soto, Michael Carl, Summer Batasin, Christopher Conlin, Tyler Seibert, Michael Hahn, Joshua Kuperman, Anders Dale, Rebecca Rakow-Penner   +10 more
openaire   +1 more source

Acinar determinants of the apparent diffusion coefficient for helium-3

Journal of Applied Physiology, 2010
The apparent diffusion coefficient (ADC) obtained by helium-3 magnetic resonance imaging over several seconds is thought to reflect diffusion impairment due to both intra- and interacinar structure. In this study, numerical simulations of intra-acinar gas mixing and effective diffusion were performed in a multiple-branch-point model of the human ...
Verbanck, Sylvia, Paiva, Manuel
openaire   +4 more sources

Age dependence of the renal apparent diffusion coefficient in children

Pediatric Radiology, 2003
Diffusion imaging has proved to be a powerful tool for diagnosing ischemic lesions in the brain, and the technique is now being applied to other organs, including the kidneys. For quantitative studies it is important to define the normal values of the apparent diffusion coefficient (ADC), given the important physiological changes that occur in the ...
Richard A, Jones, J Damien, Grattan-Smith   +1 more
openaire   +2 more sources