Coronary angiography is the diagnostic procedure that visualize the coronary arteries to confirm if angina occurs by injecting the contrast medium. The training simulation for coronary angiography is being developed. The behavior of blood and contrast medium is modeled as smoothed particle hydrodynamics (SPH).
This paper proposes the method for ghost particle sampling and determination of the property that reflecting characteristic of blood flow. Filling the vascular with blood particles requires the excessive number of particles and slows down the simulation. The blood particles are removed to reduce computation time and ghost particles are dynamically seeded in the only ambient of contrast medium particles. The absence of the blood flow results in unrealistic behavior because its influences such as pressure and viscosity on the contrast medium are neglected. The contrast medium particle interacts with ambient ghost particle to compensate for absence of blood particle. The physical property of ghost particle is determined based on blood flow analysis using commercial S/W fluent which was implemented before the simulation started. An accuracy test was implemented for 2D contrast medium simulation. The results show that the maximum velocity error is 33.86%.