Bulk modulus and volume variation measurement of the liver and the kidneys in vivo using abdominal kinetics during free breathing.
Fiche publication
Date publication
novembre 2010
Auteurs
Membres identifiés du Cancéropôle Est :
Pr MARESCAUX Jacques, Pr SOLER Luc
Tous les auteurs :
Hostettler A, George D, Remond Y, Nicolau SA, Soler L, Marescaux J
Lien Pubmed
Résumé
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.
Référence
Comput Methods Programs Biomed. 2010 Nov;100(2):149-57