Results 131 to 140 of about 3,615,865 (367)

An MRI assessment of mechanisms underlying lesion growth and shrinkage in multiple sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
By applying the tensor model, we analysed lesion orientation and the directionality of lesion expansion/contraction in multiple sclerosis. Each lesion is summarized as an ellipsoid, and the tensor model is applied to calculate lesion anisotropy. From the top to the bottom white matter atlas, surface‐in gradient segmentation and venous atlas used in the
Ermelinda De Meo, Ferran Prados Carrasco, J. William L. Brown, Alasdair J. Coles, Nick G. Cunniffe, Amy E. Jolly, Baris Kanber, Rebecca Samson, Frederik Barkhof, Declan Chard   +9 more
wiley   +1 more source

Heterogeneous carrying capacities and global extinction in metapopulations [PDF]

arXiv
In this paper we consider a simple two patch reaction diffusion model with strong Allee effect, sufficiently distinct carrying capacities, similar reaction strengths, and strong diffusion. In the homogeneous case, i.e., in in the case of equal or similar capacities and reaction strengths, it is well known that the number of stationary solutions ranges ...
arxiv  

Diffusing capacity, specific diffusing capacity and interpretation of diffusion defects.

The Western journal of medicine, 1976
Six pathophysiologic mechanisms of a reduced single breath CO diffusing capacity are discussed and the usefulness of relating carbon monoxide (CO) uptake to the functioning alveolar volume (DL/VA, specific diffusing capacity) is illustrated for several pulmonary diseases.
L N, Ayers, M L, Ginsberg, J, Fein, K, Wasserman   +3 more
openaire   +1 more source

The burden of intracranial atherosclerosis on cerebral small vessel disease: A community cohort study

Annals of Clinical and Translational Neurology, EarlyView.
Abstract Objective Exploring the prevalence and association between intracranial atherosclerosis (ICAS) and cerebral small vessel diseases (CSVD), this study delved beyond the current scope, utilising high‐resolution vessel wall MRI (HRVW‐MRI) to investigate how subtle changes in intracranial atherosclerotic features influence the various burdens of ...
Joseph Amihere Ackah, Heng Du, Wenjie Yang, Huixing Zeng, Jason Tsz Lok Chan, Michael Lung Cheung Lo, Xiangyan Chen   +6 more
wiley   +1 more source

SHORT COMMUNICATION:
The lung function in operated acquired mitral and aortic valve diseases without left ventricular failure – preliminary observations before operation

Archives of Medical Science, 2005
Introduction: The study has been designed to evaluate the influence of the operations on cardio-pulmonary by-pass, particulary with systemic normothermia and cold crystalloid cardioplegia on the function of heart and lungs.
Dariusz Nowak, Mirosław Bitner
doaj  

Nonuniformity of Diffusing Capacity From Small Alveolar Gas Samples Is Increased in Smokers

Canadian Respiratory Journal, 1998
BACKGROUND: Although centrilobular emphysema, and small airway, interstitial and alveoli inflammation can be detected pathologically in the lungs of smokers with relatively well preserved lung function, these changes are difficult to assess using ...
DJ Cotton, JT Mink, BL Graham
doaj   +1 more source

On ISI-free Modulations for Diffusion based Molecular Communication [PDF]

arXiv, 2015
A diffusion molecular channel is a channel with memory, as molecules released into the medium hit the receptors after a random delay. Coding over the diffusion channel is performed by choosing the type, intensity, or the released time of molecules diffused in the environment over time. To avoid intersymbol interference (ISI), molecules of the same type
arxiv  

STUDIES OF RESPIRATORY PHYSIOLOGY IN CHILDREN. VI. LUNG DIFFUSING CAPACITY, DIFFUSING CAPACITY OF THE PULMONARY MEMBRANE AND PULMONARY CAPILLARY BLOOD VOLUME IN CONGENITAL HEART DISEASE* [PDF]

, 1961
Giovanni Bucci, Charles D. Cook
openalex   +1 more source

Progressive Myoclonus Epilepsy: Distinctive MRI Changes in Cerebellar and Motor Networks

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Progressive myoclonus epilepsy (PME) is a rare generalized epilepsy syndrome with a well‐characterized genetic basis. The brain networks that are affected to give rise to the distinctive symptoms of PME are less well understood. Methods Eleven individuals with PME with a confirmed genetic diagnosis and 22 controls were studied.
Jillian M. Cameron, Remika Mito, Samuel F. Berkovic, Graeme D. Jackson   +3 more
wiley   +1 more source

Capacity of Diffusion-based Molecular Communication with Ligand Receptors [PDF]

arXiv, 2012
A diffusion-based molecular communication system has two major components: the diffusion in the medium, and the ligand-reception. Information bits, encoded in the time variations of the concentration of molecules, are conveyed to the receiver front through the molecular diffusion in the medium.
arxiv