| Autor: |
Michel Versluis, E.G.C Koene, Sascha Hilgenfeldt, Radboud Nelissen |
| Přispěvatelé: |
Physics of Fluids |
| Rok vydání: |
2002 |
| Předmět: |
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| Zdroj: |
9th Dutch Annual Conference on Biomedical Engineering, 2002 |
| ISSN: |
0001-4966 |
| DOI: |
10.1121/1.4779626 |
| Popis: |
The acoustic behavior of coated microbubbles depends on parameters of the shell coating, which are in turn dependent on bubble size. More intimate knowledge of this size dependence is required for an improved modeling of a distribution of coated microbubbles such as found in ultrasound contrast agents (UCA). Here a setup is designed to simultaneously measure the optical and acoustic response of an ultrasound‐driven single bubble contained in a capillary or levitated by the pressure field of a focused transducer. Optical detection is done by Mie scattering through an inverted microscope. Acoustical detection of the single bubble by a receiving transducer is made possible because of the large working distance of the microscope. For Mie scattering investigation of excited bubbles, two regimes can be distinguished, which require different detection techniques: Conventional wide‐angle detection through the microscope objective is sufficient for bubbles of radius exceeding 10 μm. For smaller bubbles, two narrow‐aperture detectors are used to reconstruct the bubble dynamics from the complex angle‐dependence of the scattered light. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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