A NEW METHOD FOR SIMULATION OF EMBOLIC SIGNAL IN ULTRASOUND BLOOD FLOW SIGNALS (A TCD SIMULATION)

A new method for simulation of Blood Flow signal containing embolus is introduced. This method relies on acoustic field calculations. Other researchers such as Jensen proposed an approach for flow data generation which shots of scatterers at different times were taken and did not take the Doppler effect into account. This method is based on Rayleigh integral and spatial impulse response. According to Rayleigh integral and using Ring function, we calculate the spatial impulse response of each scatterer. So by using that, the acoustic pressure can be simulated. When a scatterer travels across the vessels the spatial impulse response will be time variant. With assuming this fact we add the Doppler effect to signals. For simulating the embolic signal we add a high intensity transient signal. The result signal can be useful for testing embolic detection algorithms and for training purposes.

Keywords:

Embolic Signal , Transcranial Doppler Ultrasound , Blood Flow , Spatial Impulse Response , LTV Systems