Elasticity reconstruction: Beyond the assumption of local homogeneity - 09/09/10
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Abstract |
Elasticity imaging is a novel domain which is currently gaining significant interest in the medical field. Most inversion techniques are based on the homogeneity assumption, i.e. the local spatial derivatives of the complex-shear modulus are ignored. This analysis presents an analytic approach in order to overcome this limitation, i.e. first order spatial derivatives of the real-part of the complex-shear modulus are taken into account. Resulting distributions in a gauged breast lesion phantom agree very well with the theoretical expectations. An in-vivo example of a cholangiocarcinoma demonstrates that the new approach provides maps of the viscoelastic properties which agree much better with expectations from anatomy.
Le texte complet de cet article est disponible en PDF.Keywords : Biomechanics, Elasticity imaging, Inverse problems, Complex-shear modulus, Medical imaging
Plan
Vol 338 - N° 7-8
P. 474-479 - juillet 2010 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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