[HTML][HTML] Excitation of polymer-shelled contrast agents with high-frequency ultrasound
JA Ketterling, J Mamou, JS Allen… - The Journal of the …, 2007 - pubs.aip.org
Few experimental and complementary theoretical studies have investigated high-frequency
(> 20 MHz) nonlinear responses from polymer-shelled ultrasound contrast agents. Three
polymer agents with different shell properties were examined for their single-bubble
backscatter when excited with a 40 MHz tone burst. Higher-order harmonic responses were
observed for the three agents; however, their occurrence was at least partly due to nonlinear
propagation. Only one of the agents ( 1.1 μ m mean diameter) showed a subharmonic …
(> 20 MHz) nonlinear responses from polymer-shelled ultrasound contrast agents. Three
polymer agents with different shell properties were examined for their single-bubble
backscatter when excited with a 40 MHz tone burst. Higher-order harmonic responses were
observed for the three agents; however, their occurrence was at least partly due to nonlinear
propagation. Only one of the agents ( 1.1 μ m mean diameter) showed a subharmonic …
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