Abstract:

BACKGROUND: Now, the development of endocardium three-dimensional (3D) mapping system is a hot spot in medical engineering in domestic and foreign countries. The system applied to clinic has been introduced, but its price is extremely expensive. In domestic, the system is still in the phase of research. Therefore, the domestication of endocardium 3D mapping system has heavy responsibilities.
OBJECTIVE: To analyze the modeling data acquisition in 3D location and navigation system of ablation catheter, and to reconstruct endocardium 3D geometry model.
METHODS: The acquisition of endocardium 3D modeling data is directly related to the quality of reconstructed model. We visualized data acquisition process in the form of discrete points, which could achieve the comprehensive and efficient modeling point data. Through doing convex hull operation on acquired point cloud data, we got the surface extreme points of data set and constructed the polyhedron model by using of boundary representation. Finally, the generated polyhedron was served as basic voxel to complete the modeling process by discrete modeling. endocardium 3D geometry model was successfully reconstructed by using of visualization class library VTK.
RESULTS AND CONCLUSION: Simulation experiments showed that the methods we proposed could get the comprehensive and efficient modeling point data, and reconstruct endocardium 3D geometry model. It is indicated that reconstructed endocardium three-dimensional geometry model can provide technical support for 3D location and navigation system of ablation catheter.