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Influence of the pressure-dependent resonance frequency on the bifurcation structure and backscattered pressure of ultrasound contrast agents: a numerical investigation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sojahrood, Amin Jafari Falou, Omar Earl, Robert B. Karshafian, Raffi Kolios, Michael C. |
| Copyright Year | 2015 |
| Abstract | The bifurcation structure of the oscillations of ultrasound contrast agents (UCAs) was studied as a function of the driving pressure for excitation frequencies that were determined using the UCAs pressure-dependent resonances $$(f_\mathrm{s})$$(fs). It was shown that when excited by the $$(f_\mathrm{s})$$(fs), the UCA can undergo a saddle-node bifurcation (SNB) to higher amplitude oscillations. The driving pressure at which the SNB occurs is controllable and depends on the $$(f_\mathrm{s})$$(fs) magnitude. Utilizing the appropriate $$(f_\mathrm{s})$$(fs), the scattering cross section of the UCAs can significantly be enhanced (e.g., $$\sim $$∼ninefold) while at the same time avoiding potential UCA destruction (by limiting the radial expansion ratio $$<$$<2). This offers significant advantages for optimizing UCA-mediated imaging and therapeutic ultrasound applications. |
| Starting Page | 889 |
| Ending Page | 904 |
| Page Count | 16 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s11071-015-1914-7 |
| Alternate Webpage(s) | http://www.physics.ryerson.ca/mkolios/publications/sojahrood-NonDyn15.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/s11071-015-1914-7 |
| Volume Number | 80 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
