Simulation Of Blood Flow And Special Effects In Virtual Surgery Of Cardiac Intervention

Virtual surgery of cardiac intervention is a Virtual Reality system in which Virtual Reality technology and medical knowledge are applied to simulate the real cardiac intervention on the computer system. It combines knowledge and technology of many scientific fields such as computer technology, computer graphics, sensor technology, biodynamics, clinical medicine and Virtual Reality. Virtual surgery of cardiac intervention provides a realistic and exact virtual environment for doctors' pre-surgery plan researching and practice training.In this paper the problem is addressed about design and realization of blood flow simulation and special good effect in the virtual surgery of cardiac intervention.Simulation of blood flow is a very important component in the virtual system of cardiac intervention. Real time and accurate simulation of blood flow can make the visual surgery more realistic. In this paper we study the hydrodynamics for the blood flow inside the vascular, and we construct a new model of blood flow in the artery based on the Windkessel model. This model reflects the parameters' varieties of blood flow such as blood pressure synchronously. Therefore, the new model satisfies real-time requirements of virtual surgery of cardiac intervention.It is polyhedron particle technology that is complex and computationally intensive when drawing blood flow. We propose a new solution of drawing blood flow by considering the surface as a whole mesh graph. Experiments show that the new method is capable of drawing blood flow more effective and vivid.Simulation of cardiac catheterization is also under our consideration. Cardiac catheterize-tion is a main operation in the cardiac intervention. A plastic catheter is threaded up to the origin of the coronary arteries in the heart, and dye is injected through the catheter and into the coronary arteries to determine if there is any narrowing present. Based on the geometrical model of blood vessel, we propose the multi-tree which reflects artery meshwork structure, as well as simulate the cardiac catheterization by using collision detection technology.