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Selective focusing through target identification and experimental acoustic signature extraction: Numerical
S Rodriguez1, X Jacob2, V Gibiat2
1Univ. Bordeaux, I2M, UMR 5295, F-33400 Talence, France; CNRS, I2M, UMR 5295, F-33400 Talence, France; Bordeaux INP, I2M, UMR 5295, F-33400 Talence, France; Arts et métiers Paris Tech, I2M, UMR 5295, F-33400 Talence, France.
This study presents a non-invasive method for accurate acoustic wave focusing in unknown media. It enables precise targeting for applications like High Intensity Focused Ultrasound (HIFU) surgery without needing prior medium property knowledge.
Area of Science:
- Acoustics
- Medical Physics
- Biomedical Engineering
Background:
- Accurate acoustic wave focusing relies on precise knowledge of medium properties.
- Existing Time-Reversal methods for focusing are either intrusive or non-selective.
- Non-invasive focusing is crucial for applications like High Intensity Focused Ultrasound (HIFU).
Purpose of the Study:
- To achieve non-invasive and accurate acoustic focusing on a selected target.
- To overcome limitations of existing methods in unknown or heterogeneous media.
- To enable precise targeting for therapeutic ultrasound applications.
Main Methods:
- Utilizing transducer arrays with controlled emission delays.
- Developing a novel approach to achieve focusing despite inaccurate knowledge of medium acoustic properties.
- Conducting numerical experiments to validate the focusing accuracy.
Main Results:
- Demonstrated accurate acoustic focusing on a designated target.
- Successfully focused acoustic waves in an unknown heterogeneous medium.
- Validated the non-invasive nature of the proposed focusing technique.
Conclusions:
- The proposed method allows accurate, non-invasive acoustic focusing in media with unknown properties.
- This technique offers a significant advancement for targeted therapeutic ultrasound.
- Potential applications include non-invasive surgery and advanced medical imaging.
