Results 71 to 80 of about 2,847,330 (149)

Simulation Study of Kurtosis Measurements in MR Diffusion Kurtosis Imaging

, 2008
Monte Carlo simulation was performed in 1D space to study the spin diffusion, kurtosis characteristics, spin dephasing and MR signal attenuation in compartment-restricted diffusion environment. The apparent kurtosis was computed based on DKI formulation
Cheng, KH, Wu, EX
core  

Diffusion Kurtosis imaging: a possible MRI biomarker for AD diagnosis?

, 2015
The purpose of this explorative study was to investigate whether diffusion tensor imaging (DTI) and diffusion kurtosis imaging (DKI) parameter changes are reliable measures of white matter integrity changes in Alzheimer's disease (AD) patients using a ...
Peters, B, Engelborghs, Sebastiaan, Veraart, Jelle, Sijbers, J, Slaets, Sylvie, Struyfs, H, Wuyts, L, Wuyts, Laura, Parizel, Paul M., De Belder, Maya, De Belder, F, Robberecht, Caroline, Sijbers, Jan, Peters, Benjamin, Slaets, S, Veraart, J, De Belder, Frank, Struyfs, Hanne, Van Broeckhoven, C, Sleegers, Kristel, Sleegers, K, Parizel, PM, van Hecke, Wim, Robberecht, C, Van Broeckhoven, Christine, Van Hecke, W, Engelborghs, S   +26 more
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Diffusion Kurtosis Imaging of Substantia Nigra Is a Sensitive Method for Early Diagnosis and Disease Evaluation in Parkinson’s Disease

Parkinson's Disease, 2015
Background. To diagnose Parkinson disease (PD) in an early stage and accurately evaluate severity, it is important to develop a sensitive method for detecting structural changes in the substantia nigra (SN). Method.
Guohua Zhang, Yuhu Zhang, Chengguo Zhang, Yukai Wang, Guixian Ma, Kun Nie, Haiqun Xie, Jianping Liu, Lijuan Wang   +8 more
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pH imaging reveals worsened tissue acidification in diffusion kurtosis lesion than the kurtosis/diffusion lesion mismatch in an animal model of acute stroke

, 2017
Diffusion weighted imaging (DWI) has been commonly used in acute stroke examination, yet a portion of DWI lesion may be salvageable. Recently, it has been shown that diffusion kurtosis imaging (DKI) defines the most severely damaged DWI lesion that does
XiaoAn Zhang, Jerry S Cheung, Iris Yuwen Zhou, Takahiro Igarashi, Enfeng Wang, Phillip Zhe Sun, Yin Wu   +6 more
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NMR imaging as a tool for studying the diffusion and co-diffusion of gases in zeolite catalysts [PDF]

, 2005
1H NMR imaging is a powerful technique for studying the diffusion of pure hydrocarbons (for example benzene and n-hexane) during their adsorption in or desorption from a fixed bed of zeolite crystallites.
Fraissard, Jacques
core   +1 more source

Hybrid intravoxel incoherent motion–diffusion kurtosis imaging in brain MRI: A scoping review of applications, insights, and emerging directions

Journal of Magnetic Resonance Open
Intravoxel incoherent motion (IVIM) and diffusion kurtosis imaging (DKI) are advanced diffusion MRI techniques that respectively characterize microvascular perfusion and non-Gaussian diffusion.
Abhijith S, Saikiran Pendem, Rajagopal Kadavigere, Priyanka, Priya P․ S․, Dharmesh Singh   +5 more
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More accurate estimation of diffusion tensor parameters using diffusion kurtosis imaging

, 2011
: With diffusion tensor imaging, the diffusion of water molecules through brain structures is quantified by parameters, which are estimated assuming monoexponential diffusion-weighted signal attenuation.
Van Der Linden, Anne-Marie, Veraart, J, Verhoye, Marleen, Blockx, I, Blockx, Ines, Veraart, Jelle, Sijbers, J, Poot, Dirk; id_orcid, van Hecke, Wim, van der Linden, A, Verhoye, M, Poot, Dirk, Sijbers, Jan, Van Hecke, W   +13 more
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FMultifunctional magnetic resonance imaging for the assessment of renal pathological alterations in IgA nephropathy

BMC Nephrology
Background We aimed to evaluate the application value of multiparametric diffusion weighted magnetic resonance imaging (MRI) for the assessment and risk stratification of renal histopathological injuries in patients with IgA nephropathy (IgAN), as an ...
Aiqun Chen, Ban Zhao, Ying Sun, Fang Fang, Jinsong Zhang, Yonghui Mao   +5 more
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Augoregressive Conditional Kurtosis [PDF]

This paper proposes a new model for autoregressive conditional heteroscedasticity and kurtosis. Via a time-varying degrees of freedom parameter, the conditional variance and conditional kurtosis are permitted to evolve separately. The model uses only the
Simon P. Burke, Chris Brooks, Gita Persand   +2 more
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Application of diffusion magnetic resonance imaging in pathological grading of meningioma

肿瘤影像学, 2019
Meningioma is a common intracranial tumor. Although most of them are benign, some lesions graded as World Health Organization (WHO) Ⅱ or Ⅲ exhibit invasiveness and poor prognosis. Therefore, it is important to determine the grading before surgery.
LI Xuanxuan, LU Yiping, YIN Bo
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