The methods presented in this work provide a potential tool for characterizing contaminant source zones in terms of mass flux. The problem was conceptualized by considering contaminant transport through a vertical "flux plane" located between a source zone and a downgradient region where contaminant concentrations were measured. The goal was to develop a robust method capable of providing a sta...

PURPOSE Magnetic resonance elastography (MRE) is a rapidly growing noninvasive imaging technique for measuring tissue mechanical properties in vivo. Previous studies have compared two-dimensional MRE measurements with material properties from dynamic mechanical analysis (DMA) devices that were limited in frequency range. Advanced DMA technology now allows broad frequency range testing, and thre...

Neurological disorders are one of the most important public health concerns in developed countries. Established brain imaging techniques such as magnetic resonance imaging (MRI) and x-ray computerised tomography (CT) have been essential in the identification and diagnosis of a wide range of disorders, although usually are insufficient in sensitivity for detecting subtle pathological alterations...

TO THE EDITOR—We read with interest the correspondence from Collignon and Kennedy [1] regarding the duration of carriage of resistant bacteria after travelers return from tropical regions. The authors discussed the divergence in duration using a study they published in 2010 [2] and the VOYAG-R study [3]. While the overall design of both studies is similar, some key points are not. Importantly, ...

Introduction: The mechanical properties of the myocardium are known to be essential for normal cardiac function [1-4]. Myocardial stiffness is known to be a highly significant diagnostic and prognostic metric in myocardial infarction. Ex vivo stretching techniques are performed without in vivo loading conditions, and without in vivo myocardial geometry, hence they are not applicable clinically....

Target audience includes clinicians and scientists who are interested in noninvasive technologies for the assessment of hepatic fibrosis. Introduction: Chronic liver disease and cirrhosis remain a leading cause of mortality in the United States, with 143,000 hospitalizations, 11,000 inhospital deaths and 6.7 billion dollars of total hospital charges in 2009 [1]. Currently, liver biopsy is the r...

Abstract Measurement the viscoelastic properties is important for studying developmental and pathological behavior of soft biological tissues. Magnetic resonance elastography (MRE) a non-invasive method in vivo measurement tissue viscoelasticity. As flexible capable testing small samples, indentation has been widely used characterizing Using 2nd-order Prony series dimensional analysis, we analy...

For the diagnosing modality called MRE (magnetic resonance elastography), the displacement vector of a wave propagating in a human tissue can be measured. The average of the local wavelength from this measured data could be an index for the diagnosing, because the local wave length becomes larger when the tissue is stiffer. By assuming that the local form of the wave is given approximately as m...