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Acoustic Hole-Hologram for Ultrasonic Focusing With High Sensitivity
IEEE Sensors Journal ( IF 4.3 ) Pub Date : 2021-01-18 , DOI: 10.1109/jsen.2021.3052508
Zhaoxi Li , Danfeng Wang , Chunlong Fei , Pingying Jiang , Shuxiao Zhang , Dongdong Chen , Di Li , Chenxi Zhen , Runcong Wu , Xiao Peng , Yang Xu , Zeyu Chen , Wei Feng , Yintang Yang

Acoustic hologram enable the capability in the acoustic pattern control and drive many applications of ultrasound. However, hologram has not been applied to ultrasound imaging because the medical application of acoustic holograms is limited owing to the sound reflection and scattering at the acoustic holographic surface and its internal attenuation. In this study, we propose an acoustic holographic computing method and present a disc-shaped hologram with a central hole comparing with a conventional hologram using the iterative angular spectrum approach. The results show that the transducer with hole hologram achieves the required focusing effect with the full width at half maximum about $1.5\lambda $ , high sensitivity increased by 92.7%, and a low two-way insertion loss with −15.8 dB compared to conventional hologram. Pulse-echo and ultrasonic imaging are achieved by a transducer with two holograms which shows new applications of acoustic hologram in ultrasound.

中文翻译:

高灵敏度超声波聚焦的声孔全息图

声学全息图可实现声学模式控制功能,并驱动超声的许多应用。然而,由于声全息图在医学上的应用由于在声全息图表面处的声反射和散射及其内部衰减而受到限制,因此全息图尚未应用于超声成像。在这项研究中,我们提出了一种声学全​​息计算方法,并提出了一种盘状的带有中心孔的全息图,与使用迭代角谱方法的传统全息图相比。结果表明,带孔全息图的换能器达到了所需的聚焦效果,整个宽度为最大值的一半左右。 $ 1.5 \ lambda $ 与传统全息图相比,高灵敏度提高了92.7%,双向插入损耗低,为-15.8 dB。脉冲回波和超声成像是通过具有两个全息图的换能器实现的,该换能器显示了声全息图在超声中的新应用。
更新日期:2021-03-05
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