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Multispectral Optoacoustic Tomography for Functional Imaging in Vascular Research

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Sound field reconstruction using acousto-optic tomography.

Antoni Torras-Rosell¹, Salvador Barrera-Figueroa, Finn Jacobsen

¹Danish Fundamental Metrology A/S, Matematiktorvet 307, 2800 Kongens Lyngby, Denmark. atr@dfm.dtu.dk

The Journal of the Acoustical Society of America

|May 8, 2012

Summary

This summary is machine-generated.

This study explores the acousto-optic effect, where sound waves alter light

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Area of Science:

Physics
Optics
Acoustics

Background:

Sound propagation causes pressure fluctuations, altering medium density.
This density change affects the refractive index, influencing light propagation.
This interaction is termed the acousto-optic effect.

Purpose of the Study:

Derive fundamental equations for the acousto-optic effect in air.
Demonstrate measurement of the acousto-optic effect using laser Doppler vibrometry.
Validate tomographic reconstruction of sound fields via simulations and experiments.

Main Methods:

Mathematical formulation using the Radon transform for sound field reconstruction.
Experimental measurement with a laser Doppler vibrometer.
Computer simulations and comparison with microphone array data.

Main Results:

Successfully derived governing equations for the acousto-optic effect in air.
Demonstrated measurement in the audible frequency range.
Tomographic reconstructions from simulations matched experimental observations.

Conclusions:

The acousto-optic effect in air can be effectively measured and reconstructed using tomography.
Laser Doppler vibrometry is a viable tool for studying this phenomenon.
Tomographic methods provide accurate representations of sound fields.