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Published on: June 13, 2023
Vibro-acoustography beam formation with reconfigurable arrays
Hermes A S Kamimura1, Matthew W Urban, Antonio A O Carneiro
1Departamento de Fisica, Faculdade de Filosofia Ciencias e Letras de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, SP, Brazil.
Reconfigurable arrays (RCA) enable effective beam formation for vibro-acoustography (VA) imaging. This study identifies optimal RCA configurations for enhanced spatial resolution and steering in clinical VA applications.
Area of Science:
- Acoustics
- Medical Imaging
- Biomedical Engineering
Background:
- Vibro-acoustography (VA) is an emerging imaging modality.
- Reconfigurable arrays (RCA) offer potential for advanced beam formation in VA.
Purpose of the Study:
- To numerically investigate the feasibility and performance of RCA for VA beam formation.
- To identify optimal RCA parameters for clinical VA applications.
Main Methods:
- Parametric study of aperture selection, element count, channel count, focal distance, and steering.
- Numerical simulations using angular spectrum methods and Fresnel approximation.
- Evaluation of arrays from 50x50 to 200x200 elements with 32 to 128 channels.
Main Results:
- RCA transducers achieve spatial resolution comparable to confocal transducers.
- Beam steering is feasible in both elevational and azimuthal planes.
- Optimal settings for RCA parameters were identified for VA.
Conclusions:
- RCA technology is viable for clinical VA imaging.
- Optimized RCA configurations can enhance spatial resolution and enable precise beam steering.
- A channel assignment optimization is proposed for steered focus beam balancing.
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