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Related Experiment Video

Updated: Jun 7, 2026

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

Nonlinear shell behavior of phospholipid-coated microbubbles.

Marlies Overvelde¹, Valeria Garbin, Jeroen Sijl

¹Physics of Fluids Group, Research Institute for Biomedical Technology and Technical Medicine MIRA, University of Twente, Enschede, The Netherlands.

Ultrasound in Medicine & Biology

|October 30, 2010

Summary

This summary is machine-generated.

The phospholipid coating on ultrasound contrast agent microbubbles enhances nonlinear dynamics. This shell viscoelasticity explains thresholding behavior in bubble response to acoustic pressure and frequency.

Related Experiment Videos

Last Updated: Jun 7, 2026

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

Area of Science:

Acoustic physics
Biophysics
Materials science

Background:

Ultrasound contrast agents (UCAs) are microbubbles used in medical imaging.
Their dynamics are influenced by shell properties.
Understanding nonlinear dynamics is crucial for UCA applications.

Purpose of the Study:

To investigate the effect of phospholipid coating on UCA microbubble nonlinear dynamics.
To elucidate the mechanism behind UCA "thresholding" behavior.

Main Methods:

Recorded radial dynamics of individual microbubbles using ultra-high-speed imaging.
Varied driving acoustic pressure and frequency.
Utilized the shell-buckling bubble model for analysis.

Main Results:

Viscoelastic phospholipid shells enhance nonlinear bubble response at low acoustic pressures (10 kPa).
Observed pressure-dependent frequency shifts and resonance curve skewness, explaining thresholding.
Identified phospholipid concentration as a key parameter influencing bubble behavior.

Conclusions:

Phospholipid coating significantly alters UCA microbubble nonlinear dynamics.
The shell-buckling model accurately predicts UCA behavior based on shell properties.
Phospholipid concentration is a critical factor in UCA response and stability.