Bulk modulus and volume variation measurement of the liver and the kidneys in vivo using abdominal kinetics during free breathing

Authors:
Alexandre Hostettler;Daniel George;Yves Rémond;Stéphane André Nicolau;Luc Soler;Jacques Marescaux
Affiliations:
Institut de Mécanique des Fluides et des Solides, Université de Strasbourg, CNRS, 2 rue boussingault, F-67000 Strasbourg, Alsace, France and Institut de Recherche contre les Cancers de l ...;Institut de Mécanique des Fluides et des Solides, Université de Strasbourg, CNRS, 2 rue boussingault, F-67000 Strasbourg, Alsace, France;Institut de Mécanique des Fluides et des Solides, Université de Strasbourg, CNRS, 2 rue boussingault, F-67000 Strasbourg, Alsace, France;Institut de Recherche contre les Cancers de l'Appareil Digestif, IRCAD Hôpital Civil, Virtual Surgery, 1 Place de l'Hôpital, 67091 Strasbourg Cedex, France;Institut de Recherche contre les Cancers de l'Appareil Digestif, IRCAD Hôpital Civil, Virtual Surgery, 1 Place de l'Hôpital, 67091 Strasbourg Cedex, France;Institut de Recherche contre les Cancers de l'Appareil Digestif, IRCAD Hôpital Civil, Virtual Surgery, 1 Place de l'Hôpital, 67091 Strasbourg Cedex, France
Venue:
Computer Methods and Programs in Biomedicine
Year:
2010

Citing 4
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Abstract

This article presents a method of predictive simulation, patient-dependant, in real time of the abdominal organ positions during free breathing. The method, that considers both influence of the abdominal breathing and thoracic breathing, needs a tracking of the patient skin and a model of the patient-specific modification of the diaphragm shape. From a measurement of the abdomen viscera kinematic during free breathing, we evaluate through a finite element analysis, the stress field sustained by the organs for a hyperelastic mechanical behaviour using large strain theory. From this analysis, we deduce an in vivo Poisson's ratio and a homogeneous bulk modulus of the liver and kidneys, and compare it to the ones in vitro available in the literature.