Ultrasonic Micro-Elastography to Assess Biomechanical Properties of the Cornea
文献类型：期刊论文
| 作者 | Rohit Varma; Xuejun Qian; Teng Ma; Cho-Chiang Shih; Martin Heur; Zhang Jun; Koping Kirk Shung; Mark Humayun; Qifa Zhou |
| 刊名 | IEEE Transactions on Biomedical Engineering
 |
| 出版日期 | 2018 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Abstract—This paper discusses the fabrication and characterization of 3.5-MHz single-element transducers for therapeutic applications in which the active elements are made of hard lead-free BNT-based and hard commercial PZT (PZT-841) piezoceramics. Composition of (BiNa0.88 K0.08Li0.04)0.5(Ti0.985Mn0.015)O3 (BNKLT88-1.5Mn) was used to develop lead-free piezoelectric ceramic. Mn-doped samples exhibited high mechanical quality factor (Qm) of 970, thickness coupling coefficient (kt) of 0.48, a dielectric constant (εT 33) of 310 (at 1 kHz), depolarization temperature (Td) of 200 °C, and coercive field (Ec) of 52.5 kV/cm. Two different unfocused single-element transducers using BNKLT88-1.5Mn and PZT-841 with the same center frequency of 3.5 MHz and similar aperture size of 10.7 and 10.5 mm were fabricated. Pulse-echo response, acoustic frequency spectrum, acoustic pressure field, and acoustic intensity field of transducers were characterized. The BNT-based transducer shows linear response up to the peak-to-peak voltage of 105 V in which the maximum rarefactional acoustic pressure of 1.1 MPa, and acoustic intensity of 43 W/cm2 were achieved. Natural focal point of this transducer was at 60 mm from the surface of the transducer. Index Terms—High-power ultrasound (US), piezoelectric and ferroelectric transducer materials, therapeutics, transducer material characterization, and modeling. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/14379]  |
| 专题 | 深圳先进技术研究院_医工所 |
| 推荐引用方式 GB/T 7714 | Rohit Varma,Xuejun Qian,Teng Ma,et al. Ultrasonic Micro-Elastography to Assess Biomechanical Properties of the Cornea[J]. IEEE Transactions on Biomedical Engineering,2018. |
| APA | Rohit Varma.,Xuejun Qian.,Teng Ma.,Cho-Chiang Shih.,Martin Heur.,...&Qifa Zhou.(2018).Ultrasonic Micro-Elastography to Assess Biomechanical Properties of the Cornea.IEEE Transactions on Biomedical Engineering. |
| MLA | Rohit Varma,et al."Ultrasonic Micro-Elastography to Assess Biomechanical Properties of the Cornea".IEEE Transactions on Biomedical Engineering (2018). |
入库方式： OAI收割
来源：深圳先进技术研究院
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