Nonlinear response to ultrasound of encapsulated microbubbles

Jiménez Fernández, Javier (2012). Nonlinear response to ultrasound of encapsulated microbubbles. "Ultrasonics", v. 52 (n. 6); pp. 784-793. ISSN 0041-624X. https://doi.org/10.1016/j.ultras.2012.02.009.

Description

Title: Nonlinear response to ultrasound of encapsulated microbubbles
Author/s:
  • Jiménez Fernández, Javier
Item Type: Article
Título de Revista/Publicación: Ultrasonics
Date: August 2012
ISSN: 0041-624X
Volume: 52
Subjects:
Freetext Keywords: Ultrasound contrast agent; Neo-Hookean model; Scattering cross-section; Harmonic resonance frequencies
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Energética y Fluidomecánica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The acoustic backscatter of encapsulated gas-filled microbubbles immersed in a weak compressible liquid and irradiated by ultrasound fields of moderate to high pressure amplitudes is investigated theoretically. The problem is formulated by considering, for the viscoelastic shell of finite thickness, an isotropic hyperelastic neo-Hookean model for the elastic contribution in addition to a Newtonian viscous component. First and second harmonic scattering cross-sections have been evaluated and the quantitative influence of the driving pressure amplitude on the harmonic resonance frequencies for different initial equilibrium bubble sizes and for different encapsulating physical properties has been determined. Conditions for optimal second harmonic imaging have been also investigated and some regions in the parameters space where the second harmonic intensity is dominant over the fundamental have been identified. Results have been obtained for albumin, lipid and polymer encapsulating shells, respectively.

More information

Item ID: 16173
DC Identifier: http://oa.upm.es/16173/
OAI Identifier: oai:oa.upm.es:16173
DOI: 10.1016/j.ultras.2012.02.009
Official URL: http://www.sciencedirect.com/science/article/pii/S0041624X12000418
Deposited by: Memoria Investigacion
Deposited on: 14 Jan 2014 19:29
Last Modified: 21 Feb 2017 16:57
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