Results 221 to 230 of about 158,204 (264)
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Magnetic resonance imaging studies of diffusion in polymers
Food Additives and Contaminants, 1997For a number of polymer/penetrant systems, for example fatty foods in direct contact with plastic wrapping, the migration of substances from the polymer is governed by the amount of penetrant entering the polymer. For food packaging this means that the rate of migration of substances into the food can be governed by the uptake of food into the ...
S G, Harding +4 more
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Magnetization Transfer and Diffusion Tensor Magnetic Resonance Imaging
2002Patients with primary progressive (PP) multiple sclerosis (MS) represent a subgroup with clinical and magnetic resonance (MR) imaging (MRI) characteristics which differ from those of patients with relapsing-remitting (RR) MS or secondary progressive (SP) MS [1,2]. Although they experience a progressive disease course from onset, the burden and activity
Rovaris M +2 more
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[Diffusion magnetic resonance imaging of thorax].
Tuberkuloz ve toraks, 2014Although magnetic resonance imaging (MRI) of Thorax is only useful for morphological evaluation, currently we can use it for functional evaluation such as diffusion weighted imaging. Currently, we can obtain higher quality images because of new technologies such as software that decrease motion artefact, use of multi-channel, parallel imaging and fast ...
ALPER, Fatih +4 more
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Phenylketonuria: Diffusion Magnetic Resonance Imaging and Proton Magnetic Resonance Spectroscopy
Journal of Computer Assisted Tomography, 2003Two patients with phenylketonuria are reported with white matter lesions. Diffusion magnetic resonance (MR) imaging revealed restricted diffusion patterns (high signal) on b = 1000 s/mm2 images associated with low apparent diffusion coefficient values ranging between 0.44 x 10-3 mm2/s and 0.56 x 10-3 mm2/s.
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Diffusion tensor magnetic resonance image regularization
Medical Image Analysis, 2004As multi-dimensional complex data become more common, new regularization schemes tailored to those data are needed. In this paper we present a scheme for regularising diffusion tensor magnetic resonance (DT-MR) data, and more generally multi-dimensional data defined by a direction map and one or several magnitude maps.
Olivier Coulon +2 more
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Diffusion weighted magnetic resonance imaging in stroke
European Journal of Radiology, 2003Diffusion weighted magnetic resonance imaging has evolved from an esoteric laboratory experiment to a critical aspect of routine clinical care of the patient presenting with symptoms suspicious of acute ischemic stroke. The purpose of this article is to review the basis of diffusion weighted imaging (DWI), to consider its application in acute stroke ...
Timothy P L, Roberts, Howard A, Rowley
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Diffusion Magnetic Resonance Imaging in Multiple Sclerosis
Neuroimaging Clinics of North America, 2011Multiple sclerosis (MS) is considered the most common inflammatory autoimmune neurologic disorder and the most frequent cause of nontraumatic neurologic disability in young and middle-age adults. This article reviews the basic features of its magnetic resonance (MR) imaging lesions and, primarily, the use of diffusion MR imaging, which is increasingly ...
da Cruz, L.C.H. +3 more
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Magnetic resonance imaging and diffusion‐weighted imaging in methylmalonic acidemia
Acta Radiologica, 2005Methylmalonic acidemia (MMA) is an inborn disorder of amino acid metabolism, often presenting with neurological symptoms. We present the results of magnetic resonance imaging (MRI) and diffusion‐weighted imaging (DWI) of the brain in a 16‐month‐old male patient with classic neurological and laboratory findings for MMA.
Baykal, B +7 more
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Simultaneous magnetic resonance imaging of diffusion anisotropy and diffusion gradient
Magnetic Resonance Imaging, 2008The theory of diffusion gradient-weighted MRI (DGWI) is presented in this paper. The Bloch-Torrey equation was modified to include the effect of intravoxel spatial-location variation of water diffusion (diffusion gradient) on MRI signal, in addition to the effect of intravoxel spatial-direction variation of water diffusion (diffusion anisotropy).
Jie, Huang, David C, Zhu
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Magnetic Resonance Imaging of Diffuse Liver Diseases
Topics in Magnetic Resonance Imaging, 2002The intrinsic soft tissue contrast and exquisite sensitivity to contrast agents are unique attributes of magnetic resonance imaging that are beneficial when evaluating diffuse liver disease. Much like a pathologist uses different tissue or cell marker stains, the magnetic resonance imager can use a variety of imaging strategies to elucidate pathologic ...
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