Constraint-based simulation for non-rigid real-time registration

Hadrien Courtecuisse, Igor Peterlik, Raffaella Trivisonne, Christian Duriez, Stéphane Cotin
2014 Studies in Health Technology and Informatics  
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
more » ... 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.
pmid:24732484 fatcat:qjjvudrhljaj5m3mcjpldcjezy