High-power and time-reversed ultrasound based on FEM simulations and experiments
| Autor: | Edward Haggstrom, Petro Moilanen, Maria Gritsevich, Ari Salmi, Joonas Mustonen, Timo Rauhala, Oskari Tommiska |
|---|---|
| Přispěvatelé: | Materials Physics, Department of Physics |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Focal point business.industry Acoustics education 0206 medical engineering Ultrasound 02 engineering and technology Impulse (physics) 114 Physical sciences 020601 biomedical engineering Finite element method 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Transducer Narrowband Acoustic impedance business Fem simulations |
| Zdroj: | 2019 IEEE International Ultrasonics Symposium (IUS). |
| Popis: | Time-reversal (TR) is method to focus acoustic energy inside complex media. TR focusing to a predefined target point requires either an echo from a target point with acoustic impedance contrast or direct impulse actuation at the target point. Here, we used FEM to simulate the direct impulse actuation and focused ultrasound successfully to different locations in homogenous media with only four narrowband Langevin transducers. Measured intensities indicate that the focal point of the acoustic field was translated and the pressure scan shows that our TR technique works both in simulation and in experimental domain. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|