نتایج جستجو برای: t2 distribution
تعداد نتایج: 637648 فیلتر نتایج به سال:
Various magnetic resonance (MR) techniques are used to study the pathological evolution of demyelinating diseases, such as multiple sclerosis (MS). However, few studies have validated MR derived measurements with histopathology. Here, we determine the correlation of myelin water imaging, an MR measure of myelin content, with quantitative histopathologic measures of myelin density. The multi-com...
INTRODUCTION: Late Gadolinium Enhancement (LGE) CMR is the gold standard of imaging irreversible damage in myocardial infarction. However, limitations include invasive contrast administration and sensitivity to accurate choice of Inversion Time (TI). Alternative non-invasive quantitative mapping of the myocardium has been demonstrated to distinguish pathophysiological changes in acute myocardia...
We demonstrate the use of symbolic regression in deriving analytical formulas, which are needed at various stages a typical experimental analysis collider phenomenology. As first application, we consider kinematic variables like stransverse mass, ${M}_{T2}$, defined algorithmically through an optimization procedure and not terms formula. then train obtain correct expressions for all known speci...
1. The ability of crystalline ribonuclease to hydrolyze proteins is due to impurities present in the preparations and not to an intrinsic property of the ribonuclease molecule. The amounts of these impurities vary enormously with different preparations. 2. The dangers inherent in the use of crystalline enzymes as specific tools, without assaying them for all possible interfering impurities, are...
The Hotelling's control chart, is the most widely used multivariate procedure for monitoring two or more related quality characteristics, but it’s power lacks the desired performance in detecting small to moderate shifts. Recently, the variable sampling intervals (VSI) control scheme in which the length of successive sampling intervals is determined upon the preceding values has been proved t...
This study investigated the microstructures and tensile properties of as-build heat-treated (including T6, T2, T6-T2 treatments) AlSi10Mg samples fabricated by laser powder bed fusion (LPBF). The microstructure analysis revealed that trend eutectic Al-Si phase distribution along grain boundaries for was significantly weakened, transformed into Si particles which were uniformly distributed in α-...
This paper discusses a new nuclear magnetic resonance (NMR) method that can provide wettability, saturation, and oil viscosity values in rocks partially saturated with oil and brine. The method takes advantage of two new technological advances in NMR well logging—the MRF* Magnetic Resonance Fluid Characterization Method and NMR “diffusion-editing” (DE) pulse sequences. We discuss the principles...
Background The pathophysiology of changes in magnetic resonance imaging (MRI) detected after a seizure is not fully understood. Objective To characterize and describe seizure-induced by MRI. Animals Eighty-one client-owned dogs diagnosed with idiopathic epilepsy. Methods Data collected retrospectively from medical records included anatomical areas affected, T1-, T2-weighted T2-FLAIR (fluid-atte...
This paper presents the characteristics of potato and apple tissues, with/out electroporation, by Time Domain-Nuclear Magnetic Resonance (TD-NMR). A portable TD-NMR was used to measure proton relaxation time, T2, changes in cells due molecular water mobility tubers,-NMR identify modifications that occurred at cell level involving molecules tubers tissues after electroporation treatment compared...
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