Ultrasonic Doppler flow imaging simulation of mitral regurgitation

Objective: To simulate the ultrasound Doppler flow imaging of mitral regurgitation. Methods: Based on the model of round axial symmetry turbulent jet, three simplified categories of the mitral regurgitant jet were proposed. RF signals were obtained by employing the ultrasound imaging software Field II. With the application of pulsed Doppler method, blood velocity was estimated. The spectrum analysis of RF. signals was undertaken using FFT. Results: Acquired the RF signals of three different categories with different imaging angle and the estimated blood velocity, in addition the color Doppler flow imaging (CDFI) and the spectrum were also obtained. The estimated velocity increased with the decrease of angle between the ultrasonic beam and blood flow. Conclusion: The results showed that a good simulation was obtained by using this method and it would be significant for assessing mitral regurgitation clinically.