Title :
The analysis of transient Doppler frequency shift from microcavitation
Author :
Xu, Qihong ; Apfel, Robert E.
Author_Institution :
Center for Ultrasonics & Sonics, Yale Univ., New Haven, CT, USA
Abstract :
By transmitting a probing wave (29.4 MHz) toward a microbubble, a transient Doppler frequency shift is observed by estimating the transient frequency of the backscattered signal. An analytical solution is obtained by modeling the scatterer as a quasi-static sphere. The model is used to explain the experimental data. By using Prony´s method or eigenanalysis, the frequency shift of the probing wave is clearly shown. The time and frequency correspondence for bubble growth and collapse indicate an acceptable match
Keywords :
Doppler effect; bubbles; cavitation; 29.4 MHz; Prony´s method; backscattered signal; bubble collapse; bubble growth; eigenanalysis; frequency shift; microcavitation; probing wave; quasi-static sphere; transient Doppler frequency shift; Acoustic noise; Acoustic scattering; Acoustic transducers; Backscatter; Band pass filters; Frequency estimation; Medical diagnosis; Safety; Transient analysis; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 1992. Proceedings., IEEE 1992
Conference_Location :
Tucson, AZ
Print_ISBN :
0-7803-0562-0
DOI :
10.1109/ULTSYM.1992.275893
