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- W2894888657 abstract "The acoustic nonlinearity parameter B/A plays a significant role in the characterization of acoustic properties of various biomaterials and biological tissues. It has the potential to be a favorable imaging modality in contrast ultrasound imaging with coated microbubbles. However, the development of effective means for evaluating the nonlinearity parameter of suspensions of ultrasound contrast agents (UCAs, also known as bubbly liquids) remains open. The present paper formulates a new equation based on the thermodynamic method that correlates both attenuation and phase velocity of linear ultrasound. The simplicity of the present method makes the B/A estimation possible with a relatively rigorous mathematical derivation. The calculated nonlinearity parameter contains the contribution of dynamic effects of bubbles, and its low-frequency limit agrees with B/A estimated by the method of mixture law when the volume fraction is below 10-4. Furthermore, the maximum B/A in bubbly liquids can reach up to105, while the minimum can be as low as -105. The negative nonlinearity parameter indicates significantly different thermodynamic properties of bubbly liquids." @default.
- W2894888657 created "2018-10-12" @default.
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- W2894888657 date "2018-10-05" @default.
- W2894888657 modified "2023-09-27" @default.
- W2894888657 title "Acoustic Nonlinearity Parameter B/A in the Suspension of Ultrasound Contrast Agents Part I: A Thermodynamic Approach" @default.
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