Other formats:
BibTeX
LaTeX
RIS
@article{723868, author = {Brabec, Kamil and Mornstein, Vojtěch}, article_number = {2}, keywords = {ultrasound; ultrasonic cavitation; echocontrast agent; microbubbles; low-frequency analysis; cavitation threshold}, language = {eng}, issn = {1895-104X}, journal = {Central European Journal of Biology}, title = {Detection of ultrasonic cavitation based on low-frequency analysis of acoustic signal}, volume = {2}, year = {2007} }
TY - JOUR ID - 723868 AU - Brabec, Kamil - Mornstein, Vojtěch PY - 2007 TI - Detection of ultrasonic cavitation based on low-frequency analysis of acoustic signal JF - Central European Journal of Biology VL - 2 IS - 2 SP - 213-221 EP - 213-221 PB - Springer Versita SN - 1895104X KW - ultrasound KW - ultrasonic cavitation KW - echocontrast agent KW - microbubbles KW - low-frequency analysis KW - cavitation threshold N2 - The acoustic cavitation phenomenon constitutes a potential hazard in ultrasound diagnostics and therapy so that early and effective detection of cavitation is of great interest. However, cavitation might even bring a higher risk especially when an echocontrast agent based on microbubbles is used. The major goal of the present work was to develop a cavitation detection method based on increased level of cavitation noise in the range of low frequencies ( about 1 Hz). This method was applied in vitro using a model of body fluid containing a model echocontrast agent, such as 5% solution of lyophilized egg albumin, which was sonicated by ultrasound disintegrator. Ultrasound signal evokes cavitation in microbubble suspension accompanied by a certain level of cavitation acoustic noise. The level of noise voltage increased in the frequency range of 0.1 to 2 Hz in the presence of cavitation. Hence, this method makes it possible to determine the value of cavitation threshold. In addition, we examined how the cavitation threshold is affected by temperature and viscosity. It was found that the cavitation threshold decreased with growing temperature while it increased with growing viscosity. ER -
BRABEC, Kamil and Vojtěch MORNSTEIN. Detection of ultrasonic cavitation based on low-frequency analysis of acoustic signal. \textit{Central European Journal of Biology}. Springer Versita, 2007, vol.~2, No~2, p.~213-221. ISSN~1895-104X.
|