To understand the physical concepts of the different techniques To know the current indications and results of the different techniques To be able to compare the different commercial offers

The aim of elastography is to assess tissue stiffness based on 3 steps: Excitation: transmission of stress in a tissue (mechanical, vibrational, shear) Acquisition: recording the signal induced by the tissue deformation due to the stress (RF or B-mode data) Analysis/post-treatment: analysis of tissue strain induced by the propagation of the stress. Human body has a mechanical behavior similar to a soft homogeneous and isotropic linear elastic material. The stiffness of tissue is assessed by the Young elastic modulus in kilopascal kPa. A stress S...

1. Liver There are many applications of ultrasound elastography in liver. The main application is liver fibrosis evaluation, in which elastography techniques, and in particular FibroScan, are validated. Elastography can also be used for: Cirrhosis complications prediction Hepatitis treatment monitoring Diagnosis of complications occurring after liver transplantation Steatosis evaluation Characterization of hepatic tumors. A. Liver fibrosis evaluation For evaluation and quantification of liver fibrosis, all elastography techniques have been widely studied. Each technique, their advantages and drawbacks, and their diagnostic performance are detailed in tables...

Ultrasound elastography provides additional information for tumor characterization or diffuse disease diagnosis. In liver disease, elastography quantifies fibrosis and hepatic steatosis., Characterization of liver lesions by elastography is maybe helpful to diferenciate FNH from adenomas. Elastography should be used in addition to Bi Rads score for the characterization of breast lesions. Elastography can be used in addition to B mode for thyroid lesion characterization. Elastography is complex in renal disease because of various constraints (depth kidney, anisotropy, ..) and is not recognized as a routine...

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1. Liver Liver fibrosis evaluation Millonig, Hepatology 2008;48:1718-23 Lebray, Hepatology 2008;48:2089 Arena, Hepatology 2008;47:380-4 Sagir, Hepatology 2008;47:592-5 Friedrich-Rust, J Viral Hepat 2013;20:240-7 Ferraioli, Hepatology 2012;56:2125-33 Friedrich-Rust, Gastroenterol 2008;134:960-74 Fraquelli, Gut 2007; 56:968-73 Friedrich-Rust, J Viral Hepat 2012;19:212-9 Sporea, World J Radiol 2011; 28;3:188-93 Rizzo, AM j Gastroenterol 2011; 106:2112-20 Ferraioli, Eur J Radiol 2012; 81:3102-6 Friedrich-Rust, AJR 2007;188-758-64 Colombo, J Gastroenterol 2012; 47:461-9 Wang, Eur J Radiol 2012;81:31-36 Cirrhosis complication prediction Vermehren, Liver Int 2012; 32:852-8 Pritchett, J Viral Hepat 2011; 18:75-80 Bota, Ann Hepatol...