Simon Chatelin, Miguel Bernal, Thomas Deffieux, Clément Papadacci, Patrice Flaud, Amir Nahas, Claude Boccara, Jean-Luc Gennisson, Mickael Tanter, Mathieu Pernot
Shear wave elastography imaging techniques provide quantitative measurement of soft tissues elastic properties. Tendons, muscles and cerebral tissues are composed of fibers, which induce a strong anisotropic effect on the mechanical behavior. Currently, these tissues cannot be accurately represented by existing elastography phantoms. Recently, a novel approach for orthotropic hydrogel mimicking soft tissues has been developed (Millon et al 2006 J. Biomed. Mater. Res. B 305-11). The mechanical anisotropy is induced in a polyvinyl alcohol (PVA) cryogel by stretching the physical crosslinks of the polymeric chains while undergoing freeze/thaw cycles...
November 21, 2014: Physics in Medicine and Biology