Numerical analysis of dynamics of ultrasound contrast agent

In base of the Approximation of the liquid to blood, this paper numerically analyzed the dynamic of ultrasound contrast agent with matlab. Discussed different influence of the dynamic of the ultrasound contrast agent (UCA) because of different parameters of incident ultrasound and the mircobubble. The result shows that the degree of the microbubble oscillation increases with the increase of the incident ultrasound pressure. It alse shows that with low MI, the degree of the microbubble oscillation would be biggest while the incident ultrasound frequency equal to the netural frequency of the bubble. With big MI, the degree of oscillation increases with the discrease of the PNP. And we find that while the incident ultrasound pressure is less than or equal to the static pressure of the liquid, the microbubble on the resonating size oscillates fiercely, while the PNP is bigger than the static pressure of the liquid, the oscillation of the microbubble increases with the decrease of the bubble size. These conclusion will provide useful guidance in the design and clinical application of UCA.