| 聚焦超声波在层状生物媒质中的二次谐波声场的理论与实验研究 |
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| 引用本文： | 薛洪惠,刘晓宙,龚秀芬,章东.聚焦超声波在层状生物媒质中的二次谐波声场的理论与实验研究[J].物理学报,2005,54(11):5233-5238. |
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| 作者姓名： | 薛洪惠 刘晓宙 龚秀芬 章东 |
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| 作者单位： | 近代声学国家重点实验室,南京大学声学研究所,南京 210093 |
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| 基金项目： | 国家自然科学基金(批准号：10474044)资助的课题. |
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| 摘 要： | 基于Khokhlov-Zabolotkaya-Kuznetsov(KZK)方程，在频域提出了聚焦超声波在层状生物媒质中传播的理论模型，该模型计及生物媒质的吸收、非线性和边界，同时考虑声源的衍射对声传播的影响.数值研究了聚焦超声波的基波和二次谐波在层状生物媒质中的声传播，并与实验结果相比较.研究结果表明，此方法可以有效地描述聚焦超声波在层状生物媒质中的二次谐波声场.
关键词：
聚焦超声波
层状生物媒质
二次谐波
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| 关 键 词： | 聚焦超声波 层状生物媒质 二次谐波 |
| 文章编号： | 1000-3290/2005/54(11)/5233-06 |
| 收稿时间： | 01 14 2005 12:00AM |
| 修稿时间： | 2005-01-142005-03-17 |
Theoretical and experimental research on the second harmonic of focused ultrasound in layered biological media |
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| Xue Hong-Hui,Liu Xiao-Zhou,Gong Xiu-Fen,Zhang Dong.Theoretical and experimental research on the second harmonic of focused ultrasound in layered biological media[J].Acta Physica Sinica,2005,54(11):5233-5238. |
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| Authors: | Xue Hong-Hui Liu Xiao-Zhou Gong Xiu-Fen Zhang Dong |
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| Institution: | State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China |
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| Abstract: | Based on the Khokhlov-Zabolotkaya-Kuznetsov (KZK) equation in frequency-domain, a theoretical model of focused ultrasonic waves in the layered biological medium with consideration of the sound absorption, nonlinearity, boundary of the media and the diffraction of the source is presented. The propagation of focused ultrasonic waves for fundamental and second harmonic in the multi-layered biological media are numerically studied and compared with the experimental results. Good agreement of the theory with the measurement shows that this approach can effectively describe the second harmonic sound field in multi-layered biological media. |
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| Keywords: | focused ultrasound multi-layered biological media second harmonic |
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