Computer simulation of Doppler ultrasound blood flow signals from intracranial aneurysms in a pulsatile flow

Simulation studies of Doppler ultrasound blood flow signals from intracranial aneurysms in a pulsatile flow can provide a useful guidance for detecting the formation and growth progress of the intracranial aneurysms using the Doppler ultrasound technology and forecasting the size of aneurysm. Firstly, blood flow velocity distribution in the area of Intracranial aneurysm is calculated by solving the Navier-Stokes equations. Secondly, power spectral density (PSD) of the Doppler signals is estimated by summing the contribution of all scatterers through the vessel radius divided into elemental radius. Finally, the Doppler ultrasound blood flow signals are simulated using the cosine summation method. The model generates Doppler blood flow signals with the characteristics similar to those found in practice. The results show that the proposed approach is useful for simulating Doppler ultrasound signals from intracranial aneurysms in a pulsatile flow.