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7 Selected Results     continued...

The figures below are some selected results on modeling bioelectric fields within the body due to the electrical activity of the heart. The figures depict various portions of the modeling and simulation process for the three-dimensional thorax model as described in [3,4,27,39].

Figure 5: Collage of the different modeling aspects.

Figure 6: Simulation using the inhomogeneous three-dimensional model.

Figure 5 shows a collage of the different modeling aspects. Here we see a composite containing a triangulated surface of a lung, a portion of the finite element mesh, and the rendered heart, all superimposed upon the original MRI scan contained within a rendered portion of the torso surface.

Figure 6 shows a simulation using the inhomogeneous three-dimensional model. The boundary conditions were derived from unipolar electrograms recorded from the heart surface during open chest surgery. The torso on the right shows a color-coded, rendered isovoltage map, while the torso on the left has been opened to reveal the electric current loops which form in the thorax.