title: Constraint-based simulation for non-rigid real-time registration.
abstract: In this paper we propose a method to address the problem of non-rigid registration in real-time. We use Lagrange multipliers and soft sliding constraints to combine data acquired from dynamic image sequence and a biomechanical model of the structure of interest. The biomechanical model plays a role of regularization to improve the robustness and the flexibility of the registration. We apply our method to a pre-operative 3D CT scan of a porcine liver that is registered to a sequence of 2D dynamic MRI slices during the respiratory motion. The finite element simulation provides a full 3D representation (including heterogeneities such as vessels, tumor,...) of the anatomical structure in real-time.
authors.affiliation: Institut Hospitalo-Universitaire, Strasbourg, France.
authors.forename: Hadrien
authors.initials: H
authors.lastname: Courtecuisse
authors.affiliation: Institut Hospitalo-Universitaire, Strasbourg, France.
authors.forename: Igor
authors.initials: I
authors.lastname: Peterlik
authors.affiliation: Institut Hospitalo-Universitaire, Strasbourg, France.
authors.forename: Raffaella
authors.initials: R
authors.lastname: Trivisonne
authors.affiliation: SHACRA Project, INRIA, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Duriez
authors.affiliation: Institut Hospitalo-Universitaire, Strasbourg, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Cotin
mesh_terms: D000818:Animals; D007089:Image Enhancement / Q000379:methods*; D021621:Imaging, Three-Dimensional; D008099:Liver / Q000502:physiology; D008279:Magnetic Resonance Imaging; D009038:Motion; D013552:Swine; D014584:User-Computer Interface