Další formáty:
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 a Vojtěch MORNSTEIN. Detection of ultrasonic cavitation based on low-frequency analysis of acoustic signal. \textit{Central European Journal of Biology}. Springer Versita, 2007, roč.~2, č.~2, s.~213-221. ISSN~1895-104X.
|
