Abstract
For ultrasonic ablation of adipose tissue it is necessary to dynamically focus high intensity acoustic energy in a depth interval of 5–40 mm from the skin surface. One of the methods for achieving this goal is the use of powerful spherical emitters having large aperture angles, which are built as multielement phased arrays. For description of acoustic fields emitted by such transducers a nonlinear model is developed; the model has a larger area of applicability with respect to the aperture angle, as compared to known approaches. A method for manufacturing the phased array using a single spherical piezo element produced from a proprietary non-composite piezo ceramics developed at UltraShape Ltd. is proposed. The method is based on the segmentation of one of the electrodes of the piezo element into N randomly distributed circular elements. The proto-type array was manufactured, and the level of cross-talking between neighboring elements has been evaluated.
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Original Russian Text © V.I. Goland, L.M. Kushkuley, 2009, published in Akusticheskiĭ Zhurnal, 2009, Vol. 55, No. 4–5, pp. 481–495.
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Goland, V.I., Kushkuley, L.M. Strongly focusing multielement therapeutic emitters for noninvasive ultrasonic ablation of adipose tissue. Acoust. Phys. 55, 496–509 (2009). https://doi.org/10.1134/S106377100904006X
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DOI: https://doi.org/10.1134/S106377100904006X