Design concept verification for a transcranial acoustic lens with instantaneous adaptability
Design concept verification for a transcranial acoustic lens with instantaneous adaptability
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DOI：
10.1063/5.0101875
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发表时间：
2022-10
影响因子：
3.2
通讯作者：
T. Ueta
中科院分区：
文献类型：
--
作者：
T. Ueta
根据菲涅耳透镜的概念，提出了一种由点状散射体在晶格上优化排列而成的透镜，它能将入射平面波聚焦在焦点上，并能抑制除焦点附近以外的声场。本文研究了菲涅耳声透镜散射阵透镜的经颅聚焦性能。通过最小化目标函数来优化散射体的排列，使声场在头盖骨内除焦点处外消失，并且在焦点处比周围区域高。结果表明，该透镜对入射平面波的聚焦具有足够的强度和与周围环境的对比度，甚至是经面聚焦。
A lens constructed by optimally arranging point-like scatterers on a lattice was proposed according to the Fresnel lens concept and showed superior performance focusing an incident plane wave on a focal point and suppressing the sound field except in the vicinity of the focal point. In the present study, we investigated the transcranial focusing performance of the scatterer-array lens which is a kind of Fresnel acoustic lens. The arrangement of the scatterers was optimized by minimizing an objective function so that the sound field vanishes within the skull except at the focal point(s) and becomes higher at the focal point(s) than in the surrounding area. It was confirmed that the lens focused the incident plane wave with sufficient intensity and contrast with the surroundings, even transcranially.