Modulational Instability and localized modes for ultrasound contrast microbubbles surface oscillations

Santos, Serge Dos; Sánchez‐Morcillo, Víctor J.; Jiménez, Noé; Chaline, Jennifer; Bouakaz, Ayache

doi:10.1109/ultsym.2011.0157

Cited by 6 publications

(7 citation statements)

References 15 publications

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“…Original experiment [11] has been modified and consists in studying vibration modes of coupled pendulums ring subjected to a parametric excitation of which one varies the amplitude A or the frequency f e . The study of the nonlinear behavior aims to understand the mechanisms at the origin of the modulational instability of these vibration modes.…”

Section: Methodsmentioning

confidence: 99%

“…A full understanding of the microbubbles dynamics is necessary to, subsequently, study it in experimental and clinical conditions. The purpose of this work is to study the interaction modes between these microbubbles and acoustic waves and especially the modulational instability of asymmetrical modes that microbubbles present under ultrasound excitation [11]. Under specific ultrasound activation, microbubbles undergo nonlinear oscillations and present surface patterns called surface modes ( fig.2).…”

Section: Introductionmentioning

confidence: 99%

“…This work aims to select optimal excitation conditions of the microbubble for both imaging and therapeutic applications. Based on a discrete nonlinear model of coupled pendulums [11] and a continuous model describing microbubble's dynamics, vibration modes are investigated theoretically and experimentally in complement of numerical 329 978-1-4673-5686-2/13/$31.00 ©2013 IEEE 2013 Joint UFFC, EFTF and PFM Symposium studies performed previously [13].…”

Section: Introductionmentioning

confidence: 99%

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Vibration modes in a pendulums ring: Analogy with gas microbubbles surface modes

Chaline

Bouakaz

Sánchez‐Morcillo³

et al. 2013

2013 IEEE International Ultrasonics Symposium (IUS)

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When subjected to ultrasound activation, microbubbles (1 − 8 μm) present a fairly complex dynamics. Their behavior can be well modeled by coupled oscillators system. In this study, microbubble surface modes have been investigated through an acousto-mechanical analogy base on coupled pendulums. Observation of parametric vibration modes up to n = 17 for a ring of pendulums excited at frequencies between 1Hz and 4 Hz is presented. The relevance of the use of the pendulums ring for studying microbubble dynamics is discussed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vibration modes in a pendulums ring: Analogy with gas microbubbles surface modes

Chaline

Bouakaz

Sánchez‐Morcillo³

et al. 2013

2013 IEEE International Ultrasonics Symposium (IUS)

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“…14,15 The mechanisms underlying its nonlinear behavior are sought to improve our understanding of the microbubble dynamics. The study of a single microbubble is a difficult task, particularly because of the interaction with other microbubbles or microstreaming that sweep away the bubble.…”

Section: Introductionmentioning

confidence: 99%

Macroscopic acousto-mechanical analogy of a microbubble

Chaline

Jiménez

Mehrem

et al. 2015

The Journal of the Acoustical Society of America

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Microbubbles, either in the form of free gas bubbles surrounded by a fluid or encapsulated bubbles used currently as contrast agents for medical echography, exhibit complex dynamics under specific acoustic excitations. Nonetheless, considering their micron size and the complexity of their interaction phenomenon with ultrasound waves, expensive and complex experiments and/or simulations are required for their analysis. The behavior of a microbubble along its equator can be linked to a system of coupled oscillators. In this study, the oscillatory behavior of a microbubble has been investigated through an acousto-mechanical analogy based on a ring-shaped chain of coupled pendula. Observation of parametric vibration modes of the pendula ring excited at frequencies between 1 and 5 Hz is presented. Simulations have been carried out and show mode mixing phenomena. The relevance of the analogy between a microbubble and the macroscopic acousto-mechanical setup is discussed and suggested as an alternative way to investigate the complexity of microbubble dynamics.

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“…In this study, the interaction between ultrasound and a microbubble, and especially the appearance of vibration modes, are studied using a macroscopic analog system [128,129]. The mechanisms underlying its nonlinear behavior are sought to improve our understanding of the microbubble dynamics.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear acoustics in periodic media: from fundamental effects to applications

Mehrem¹

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Modulational Instability and localized modes for ultrasound contrast microbubbles surface oscillations

Cited by 6 publications

References 15 publications

Vibration modes in a pendulums ring: Analogy with gas microbubbles surface modes

Vibration modes in a pendulums ring: Analogy with gas microbubbles surface modes

Macroscopic acousto-mechanical analogy of a microbubble

Nonlinear acoustics in periodic media: from fundamental effects to applications

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