点状散乱体配置最適化経頭蓋音響レンズの収束および集束特性の頭蓋骨形状依存性

抄録

We have modeled the skull by a circular array of point-like scatterers, and optimized the arrangement of point-like scatterers constructing a transcranial ultrasonic lens by the condition that the sound field intensity within the skull has a peak at a focal point and vanishes at any other points, and shown that an ultrasonic lens with sufficient function is realized. In this paper, we analyze the case of an elliptical skull, and show that even for this case as well, the proposed optimization yields a arrangement of scatterers with equivalent performance to the case of a circular skull.