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Article Dans Une Revue Biomedizinische Technik. Ergänzungsband (Berlin. Zeitschrift) Année : 2005

The physics of nanoshelled microbubbles

Résumé

Nanoshelled microbubbles are suitable markers for perfused areas in ultrasonic imaging, and have potential applications in therapy. With radii up to 5 microns, their resonance frequencies are in the lower megahertz range. We explored the physics of nanoshelled microbubbles, with special attention to the influence of the nanoshell on the oscillation offset with respect to the driving phase. Microbubbles above resonance size oscillate π rad out of phase with respect to microbubbles under resonance size. As the damping becomes less, this transition in offset becomes more abrupt. Therefore, the damping due to the friction of the nanoshell can be derived from this abruptness. We support our results with some high-speed optical observations of oscillating microbubbles in an ultrasonic field.
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hal-03189339 , version 1 (03-04-2021)

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  • HAL Id : hal-03189339 , version 1

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Michiel Postema, Nico de Jong, Georg Schmitz. The physics of nanoshelled microbubbles. Biomedizinische Technik. Ergänzungsband (Berlin. Zeitschrift), 2005, Medical Physics: Proceedings of the jointly held Congresses ICMP 2005 14th International Conference of Medical Physics of the International Organization for Medical Physics (IOMP), the European Federation of Organizations in Medical Physics (EFOMP) and the German Society of Medical Physics (DGMP); BMT 2005 39th Annual Congress of the German Society for Biomedical Engineering (DGBMT) within VDE 14th -17th September 2005, Nuremberg, Germany, 50 (Suppl. 1), pp.748-749. ⟨hal-03189339⟩

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