Transient elastography and supersonic imaging are promising new techniques for characterizing the elasticity of soft tissues. Using this method, an ‘ultrafast imaging’ system (up to 10 000 frames s−1) follows in real time the propagation of a low frequency shear wave. The displacement of the propagating shear wave is measured as a function of time and space. The objective of this paper is to de...

PURPOSE Transient elastography (Fibroscan(©); (FS)) and acoustic radiation force impulse imaging (ARFI) represent noninvasive, user-friendly and quick methods providing an objective and reproducible measure of liver stiffness. The aim of the study was to evaluate cut-off values and performance of ARFI measurements in children using transient elastography as a reference. METHODS/PATIENTS A tot...

BACKGROUND Up to 5% of inflammatory bowel disease (IBD) patients are thought to have clinically significant liver disease due to multifactorial causes, however, this figure may be an underestimate due to reliance on abnormal liver tests (LTs) and/or liver biopsies. AIMS Our aim was to evaluate the prevalence of clinically significant liver disease in IBD patients as defined by an increased li...

The objective of this thesis is to develop a rigorous mathematical and numerical background for the extension and dissemination of imaging modalities by ultrasound, i.e. elastic waves, applied to the cardiac settings. The problems treated will concerned the topics of mathematical modeling, numerical analysis and scientific computing. More precisely we plan to define a linearized model for the p...

Abstract BackgroundAmong non-invasive strategies available for liver fibrosis assessment, transient elastography is widely used, as it and can be repeated. Hepatus® (Mindray, China) one novel instrument measuring stiffness that now in the market with lower price than its precursor, FibroScan® (Echosens, Paris). MethodIn this cross sectional study, CHB patients single center were recruited conse...

Gastroesophageal varices are a common complication of cirrhosis and are present in approximately 50% of patients with cirrhosis.[1] Acute gastroesophageal variceal hemorrhage is a severe complication of cirrhosis or portal hypertension associated with high mortality.[1‐3] Although mortality of gastroesophageal variceal hemorrhage has decreased in the past three decades, it remains the most comm...

Elastography can noninvasively map the elasticity distribution in biological tissue, which can potentially be used to reveal disease conditions. In this Letter, we have demonstrated photoacoustic elastography by using a linear-array photoacoustic computed tomography system. The feasibility of photoacoustic elastography was first demonstrated by imaging the strains of single-layer and bilayer ge...

Quasi-static elastography involves estimating the displacement field of the tissue undergoing slow compression. Since elastography is computationally expensive, many compromises have been made to perform it in real time. Parallelized algorithms and implementations for freehand palpation elastography are proposed in this paper to speed the computation. We present parallel implementations for Nor...

BACKGROUND Ultrasound elastography is an imaging modality used to show tissue stiffness in tumor pathophysiological processes that promote the formation of stiffer tissues. Endobronchial ultrasound (EBUS) elastography is an ultrasound elastography-based technique for measuring tissue stiffness during EBUS-guided transbronchial needle aspiration (EBUS-TBNA). The diagnostic value of EBUS elastogr...