Reduction of ultrasound inertial cavitation threshold using bifrequency excitation

2006 ◽  
Vol 89 (9) ◽  
pp. 094106 ◽  
Author(s):  
Bruno Gilles ◽  
Jean Christophe Béra ◽  
Jean Louis Mestas ◽  
Dominique Cathignol
Keyword(s):  
Inertial Cavitation ◽  
Cavitation Threshold

Inertial cavitation threshold dependence on high static pressures.

2010 ◽  
Vol 127 (3) ◽  
pp. 1984-1984
Author(s):  
Kenneth, B. Bader ◽  
Joel Mobley ◽  
Jason Raymond ◽  
D. Felipe Gaitan
Keyword(s):  
Inertial Cavitation ◽  
Cavitation Threshold

Investigation on the inertial cavitation threshold of micro-bubbles

2013 ◽  
Vol 133 (5) ◽  
pp. 3496-3496
Author(s):  
Xiasheng Guo ◽  
Dong Zhang ◽  
Juan Tu
Keyword(s):  
Inertial Cavitation ◽  
Cavitation Threshold

Inertial cavitation threshold of nested microbubbles

Ultrasonics ◽  
2015 ◽  
Vol 58 ◽  
pp. 67-74 ◽  
Author(s):  
N. Wallace ◽  
S. Dicker ◽  
Peter Lewin ◽  
S.P. Wrenn
Keyword(s):  
Inertial Cavitation ◽  
Cavitation Threshold

scholarly journals Cavitation Dynamics and Inertial Cavitation Threshold of Lipid Coated Microbubbles in Viscoelastic Media with Bubble–Bubble Interactions

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1125
Author(s):  
Dui Qin ◽  
Qingqin Zou ◽  
Shuang Lei ◽  
Wei Wang ◽  
Zhangyong Li
Keyword(s):  
Surface Tension ◽  
Bubble Dynamics ◽  
Surrounding Medium ◽  
Small Bubble ◽  
Initial Surface ◽  
Viscoelastic Media ◽  
Bubble Interactions ◽  
Inertial Cavitation ◽  
Cavitation Threshold ◽  
Bubble Oscillations

Encapsulated microbubbles combined with ultrasound have been widely utilized in various biomedical applications; however, the bubble dynamics in viscoelastic medium have not been completely understood. It involves complex interactions of coated microbubbles with ultrasound, nearby microbubbles and surrounding medium. Here, a comprehensive model capable of simulating the complex bubble dynamics was developed via taking the nonlinear viscoelastic behaviors of the shells, the bubble–bubble interactions and the viscoelasticity of the surrounding medium into account simultaneously. For two interacting lipid-coated bubbles with different initial radii in viscoelastic media, it exemplified that the encapsulating shell, the inter-bubble interactions and the medium viscoelasticity would noticeably suppress bubble oscillations. The inter-bubble interactions exerted a much stronger suppressing effect on the small bubble within the parameters examined in this paper, which might result from a larger radiated pressure acting on the small bubble due to the inter-bubble interactions. The lipid shells make the microbubbles exhibit two typical asymmetric dynamic behaviors (i.e., compression or expansion dominated oscillations), which are determined by the initial surface tension of the bubbles. Accordingly, the inertial cavitation threshold decreases as the initial surface tension increases, but increases as the shell elasticity and viscosity increases. Moreover, with the distance between bubbles decreasing and/or the initial radius of the large bubble increasing, the oscillations of the small bubble decrease and the inertial cavitation threshold increases gradually due to the stronger suppression effects caused by the enhanced bubble–bubble interactions. Additionally, increasing the elasticity and/or viscosity of the surrounding medium would also dampen bubble oscillations and result in a significant increase in the inertial cavitation threshold. This study may contribute to both encapsulated microbubble-associated ultrasound diagnostic and emerging therapeutic applications.

Sign in / Sign up

Export Citation Format

Share Document