Team ALCOVE

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Section: New Results

Cutting and suture of deformable objects

Participants : Laurent Grisoni, Damien Marchal, Christophe Guerbert.

This work takes place in the context of our surgical simulator activities (see SPORE and SOFA). To simulate cutting operation, we proposed new algorithms based on Meshless methods. The approach is based on the Shape-Matching method. This method is used to animate object deformations and has the strong advantage to be unconditionally stable. Compared to more classical FEM based approaches, where the underlying tetrahedral mesh has to be well conditioned, the stability of the Shape-Matching approach a more easy cutting procedure. The main drawback of the Shape-Matching approach is that it is based on the object segmentation. We proposed a new algorithm that is fast enough to be used in real-time while the object is cut. First results of this work have been presented in Damien Marchal's PhD thesis [13] and during the poster session at the SCA conference [27] . In the following of this work we start, with Christophe Guebert, a new PhD thesis on suturing .

Figure 5. An exemple of the cutting of an object. The object is composed of 7000 tetrahedras, animation of the deformation is in real-time.
IMG/marchal06cutting

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