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It was concluded that low-level laser therapy (LLLT) of the thyroid gland may affect the level of thyroidal hormones.

The pulse shape of the cylindrical ultrasonic pressure waves generated by transient laser irradiation in a weakly absorbing liquid is calculated for Green’s function formalism. The calculated results are in reasonable agreement with the experimental pulse shapes measured using a thin transducer. The pressure pulse shape is shown to be affected by the relaxation time of the absorbed energy.

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