Abstract
Thermal lesions were formed in samples of chicken breast by the application of high-intensity focused ultrasound. A coherent light source illuminating the insonified samples was phase-modulated via the acousto-optic effect. The resultant optical field was sampled by a fibre-coupled optical autocorrelation detection technique. Both the acousto-optic and pure optical signals successfully indicated the formation of a lesion, however the latter measurement demonstrated a higher correlation to the resultant lesion volume.
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