Andriianov Iu V, Bondarenko O N
Med Tekh. 1986 May-Jun(3):4-7.
In developing medical device for transcutaneous destruction of renal stones in patients suffering from nephrolithiasis we have encountered some problems concerning the focusing of sound pulses. On the assumption of the linear diffraction theory the pressure pattern is computed that is produced when sound pulses are emitted by a source in the vicinity of the elliptic reflector focal point. Pressure pattern and wave-front shape versus radiator displacements off the focal point are studied. Radiator displacement is shown to have a marked effect on pressure amplitude and distribution within the area. Thus, a correcting acoustic lens should be mounted close to the reflector aperture.
在为患有肾结石的患者研发用于经皮破坏肾结石的医疗设备时，我们遇到了一些关于声脉冲聚焦的问题。基于线性衍射理论，计算了声源在椭圆形反射器焦点附近发射声脉冲时产生的压力分布。研究了压力分布和波前形状与辐射器偏离焦点位移的关系。结果表明，辐射器位移对该区域内的压力幅度和分布有显著影响。因此，应在靠近反射器孔径处安装一个校正声透镜。
