Abstract

A method of focused delivery of ultrasonic energy to a given point inside a biological object using a circular antenna array is proposed. The functional diagram of a multielement circular array with alternating emitting and receiving elements is presented. The channels of emitting elements contain controlled phase shift modules and all receiving elements are connected to the summator. The possibility of ultrasonic energy focusing is shown by means of modeling of the circular array operation with allowance for the wave propagation in two media. The result of focusing is estimated with allowance for the interface between two media. It is assumed that the two media differ in the propagation speed of the ultrasonic wave. The presence of two media on the propagation path of the ultrasonic wave leads to defocusing and shift of the focus position.

中文翻译：

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考虑到两种介质之间的界面，在生物对象的给定区域中聚焦超声波能量

摘要

提出了一种使用圆形天线阵列将超声波能量集中传递到生物对象内部的给定点的方法。给出了具有交替发射和接收元件的多元件圆形阵列的功能图。发射元件的通道包含受控相移模块，所有接收元件都连接到求和器。超声能量聚焦的可能性通过对圆形阵列操作的建模来显示，其中考虑了波在两种介质中的传播。考虑到两种介质之间的界面，估计聚焦结果。假设两种介质的超声波传播速度不同。超声波传播路径上存在两种介质会导致散焦和焦点位置偏移。