| 自聚焦换能器的声场研究 |
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| 引用本文： | 夏荣民,寿文德,孙俊霞,严加勇.自聚焦换能器的声场研究[J].应用声学,2001,20(5):16-20. |
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| 作者姓名： | 夏荣民 寿文德 孙俊霞 严加勇 |
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| 作者单位： | 上海交通大学 |
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| 基金项目： | 国家自然科学基金资助项目(39970209) |
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| 摘 要： | 高强度聚焦超声（HIFU）治疗局部肿瘤是一项无创伤的新技术，有着很好的应用前景，因此对其声场的研究是有实际的价值的。对声场的研究不仅有利于换能器的设计，提高治疗的效果；而且有助声场测量方案的设计，提高对治疗超声剂量的安全保证。本文采用时域有限差分法研究了自聚焦换能器的声场，分别对简谐波，脉冲波进行了研究。比较清楚地看出在焦区的声场可以认为是平面波，这对光纤端面法声场测量提供了有力的支持。
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| 关 键 词： | 高强度聚焦超声 自聚焦换能器 声场 时域有限差分 FDTD 超声疗法 肿瘤 |
The ultrasound field of a self-focusing transducer |
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| Xia Rongmin,Shou Wende,Shun Junxia and Yan Jiayong.The ultrasound field of a self-focusing transducer[J].Applied Acoustics,2001,20(5):16-20. |
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| Authors: | Xia Rongmin Shou Wende Shun Junxia and Yan Jiayong |
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| Institution: | Shanghai JiaoTong University, Shanghai 200030;Shanghai JiaoTong University, Shanghai 200030;Shanghai JiaoTong University, Shanghai 200030;Shanghai JiaoTong University, Shanghai 200030 |
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| Abstract: | Since the high intensity focused ultrasound (HIFU) when using for treating a local tumor is a non-contacting and promising, it seems worthy to study the ultra- sonic field in focal region. The study of ultrasound is helpful not only for promoting the design of transducer and enhancing the clinical effect, but also for the design of the ultrasound field measurement and more safety for the ultrasound dose. In this paper, the time domain finite differential (FDTD) method is used to study the ultrasonic field of the self-focusing transducer, both for simple harmonic wave and for pulse wave. It is clear from our result that the acoustic field at the focus can be regarded as a plane wave, and this is very useful for the fiber-tip method of ultrasonic field measurement. |
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| Keywords: | HIFU Self-focusing transducer Acoustic field Time domain finite differential method FDTD |
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