Results 101 to 110 of about 2,999,829 (296)

Diffusion Tensor Imaging: Structural adaptive smoothing [PDF]

, 2007
Diffusion Tensor Imaging (DTI) data is characterized by a high noise level. Thus, estimation errors of quantities like anisotropy indices or the main diffusion direction used for fiber tracking are relatively large and may significantly confound the ...
Voss, Henning U., Tabelow, Karsten, Spokoiny, Vladimir, Polzehl, Jörg   +3 more
core   +1 more source

Diffusion tensor imaging investigations in Alzheimer’s disease: the resurgence of white matter compromise in the cortical dysfunction of the aging brain

Neuropsychiatric Disease and Treatment, 2008
David A Medina1, Moises Gaviria21Department of Psychiatry, Case Western Reserve University, Cleveland, OH, USA; 2University of Illinois at Chicago, IL, USAAbstract: Diffusion tensor imaging (DTI) is a sophisticated MRI-based neuroimaging technique that ...
David A Medina, Moises Gaviria
doaj  

Optical Signature of Moiré Superlattices Formed by Twisted SrTiO3 Membranes

Advanced Functional Materials, EarlyView.
We discover optical signatures from bonded interfaces in twisted SrTiO3 moiré superlattices, including low‐frequency Raman vibrational modes and strong second‐harmonic generation, consistent with strong interlayer coupling inferred from cross‐sectional electron microscopy and ab initio calculations. ABSTRACT Moiré superlattices formed at the interfaces
T. A. M. Ragib Shahriar, Fumikazu Murakami, Xing He, Konnor Koons, Xinyan Li, Bumseop Kim, Shihan Qin, Varun Harbola, Jochen Mannhart, Yimo Han, Ruijuan Xu, Shengxi Huang, Andrew M. Rappe, Hanyu Zhu   +13 more
wiley   +1 more source

Axon radius measurements in vivo from diffusion MRI: A feasibility study [PDF]

, 2007
This paper investigates the feasibility of using diffusion MRI to measure axon-cell dimensions in the white matter of live subjects. A simple geometric model of white-matter tissue provides an expression that relates the axon radius to the diffusion MRI ...
Daniel C. Alexander, Alexander, DC
core   +1 more source

Electrospun Wood‐Derived Biopolymers as Electrodes in Electrochemical Energy Storage Technologies

Advanced Functional Materials, EarlyView.
Electrospinning transforms wood‐derived cellulose and lignin into architecturally defined, binder‐free carbon electrodes with tuneable porosity and functionality. This review shows how fibre design enables decoupled charge and mass transport, enhancing performance across battery systems, while identifying key challenges in spinnability, scalability ...
Michael W. Thielke, Hattie R. Chisnall, Jesus Vazquez Chavez, Ana B. Jorge Sobrido   +3 more
wiley   +1 more source

Model-Based Bootstrapping on Classified Tensor Morphologies: Estimation of Uncertainty in Fibre Orientation and Probabilistic Tractography. [PDF]

In this study, fast and clinically feasible model-based bootstrapping algorithms using a geometrically constrained two-tensor diffusion model are employed for estimating uncertainty in fibre-orientation. Voxels are classified based on tensor morphologies
Bertoni, Miguel, Hojjatoleslami, Ali, Ratnarajah, Nagulan, Davydov, Oleg, Simmons, Andy   +4 more
core  

Mechanisms of Cognitive Impairment in Cerebral Small Vessel Disease: Multimodal MRI Results from the St George's Cognition and Neuroimaging in Stroke (SCANS) Study. [PDF]

, 2013
Cerebral small vessel disease (SVD) is a common cause of vascular cognitive impairment. A number of disease features can be assessed on MRI including lacunar infarcts, T2 lesion volume, brain atrophy, and cerebral microbleeds.
Lawrence, AJ, Barrick, Thomas R., Lawrence Andrew J., Barrick Thomas R., Andrew J Lawrence, Robin G Morris, MacKinnon, Andrew D., Hugh S. Markus, Thomas R Barrick, Bhavini Patel, Robin G. Morris, MacKinnon, AD, Bhavini Patel (405150), Barrick, TR, Philip M. Rich (405153), Markus, HS, Andrew D. MacKinnon, Rich, PM, Thomas R. Barrick (405154), Thomas R. Barrick, Hugh S Markus, Lawrence, Andrew J.; id_orcid, Patel, B, Andrew J. Lawrence, MacKinnon Andrew D., Rich, Philip M., Hugh S. Markus (366687), Andrew J. Lawrence (292444), Robin G. Morris (405151), Morris, RG, Patel Bhavini, Morris Robin G., Morris, Robin G., Andrew D MacKinnon, Rich Philip M., Patel, Bhavini, Philip M Rich, Andrew D. MacKinnon (405152), Markus Hugh S., Philip M. Rich, Markus, Hugh S.   +40 more
core   +2 more sources

Embedded Ferroelectric Nanoclusters Can Drive Polarization Reversal in a Non‐Ferroelectric Polar Film via the Proximity Effect

Advanced Functional Materials, EarlyView.
Ferroelectric nanoclusters create local internal fields in a normally non‐switchable polar film because of polarization mismatch at their interfaces. That field opposes polarization in the regions with larger polarization and reinforces polarization in the regions with smaller polarization.
Anna N. Morozovska, Eugene A. Eliseev, Sergei V. Kalinin, Long‐Qing Chen, Dean R. Evans, Venkatraman Gopalan   +5 more
wiley   +1 more source

Multiple indices of diffusion identifies white matter damage in mild cognitive impairment and Alzheimer's disease [PDF]

, 2010
The study of multiple indices of diffusion, including axial (DA), radial (DR) and mean diffusion (MD), as well as fractional anisotropy (FA), enables WM damage in Alzheimer's disease (AD) to be assessed in detail.
Bartley, Máiréad, Lamberton, Franck, O'Neill, Des, D Rónán Collins, David Prvulovic, O'Dwyer, Laurence, D. Rónán Collins, Collins, D Rónán, Máiréad Bartley, Faluyi, Yetunde O., Harald Hampel, Bokde, Arun L. W., Mazoyer, Bernard M., Mazoyer, Bernard, Yetunde O. Faluyi, Hampel, Harald, Bokde, Arun L W, Laurence O'Dwyer, Arun L. W. Bokde, Prvulovic, David, Michael Ewers, Ewers, Michael, Faluyi, Yetunde O, Colby Tanner, Tanner, Colby, Franck Lamberton, Collins, D. Rónán, Coughlan, Tara, Des O'Neill, Arun L W Bokde, Yetunde O Faluyi, Bernard Mazoyer, Tara Coughlan   +32 more
core   +2 more sources

A Novel Modified Petroresin Particle (MPRP) With Enhanced Oil–Water Selectivity for Cold Production in Heavy Oil Reservoirs

Advanced Functional Materials, EarlyView.
A novel oil–water selective conformance control agent, MPRP, is prepared via hydrophilic grafting and mechanical granulation. MPRP uniformly disperses in water, cohesively expands upon aging, and readily dissolves in the oil phase. During conformance control, it selectively aggregates in water channeling pathways to form effective plugs without ...
Guang Zhao, Dongfang Lv, Chang Liu, Changxu Wu, Yifei Liu, Caili Dai, Huazhou Li   +6 more
wiley   +1 more source