| 医用线列阵声场计算方法 |
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| 引用本文： | 刘鹏华,戴明远. 医用线列阵声场计算方法[J]. 声学技术, 2004, 23(3): 163-167 |
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| 作者姓名： | 刘鹏华 戴明远 |
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| 作者单位： | 同济大学信息与通信工程系,上海,200092 |
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| 摘 要： | 用指向性函数分别描述了医用线列阵单频波和宽带波声场。讨论了应用电子聚焦处理、幅度加权变迹处理和孔径变迹处理的方法来改善波束特性；论述了在实际中应用较多的宽带波声场的计算。通过分析表明，宽带波持续时间愈长，宽带波声场就愈接近于单频波声场。
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| 关 键 词： | 宽带 列阵 单频 变迹 声场 波束 指向性 处理 医用 持续时间 |
| 文章编号： | 1000-3630(2004)03-0163-05 |
| 收稿时间： | 2003-12-30 |
| 修稿时间： | 2004-03-30 |
Methods for calculating acoustic fields of medical linear array |
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| LIU Peng-hua and DAI Ming-yuan. Methods for calculating acoustic fields of medical linear array[J]. Technical Acoustics, 2004, 23(3): 163-167 |
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| Authors: | LIU Peng-hua and DAI Ming-yuan |
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| Affiliation: | Department of Information and Communication Engineering, Tongji University, Shanghai 200092, China;Department of Information and Communication Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | The directivity function is used to describe the sound field of single-frequency and broad-band waves produced by a medical linear array. A method is developed with electronic focusing, amplitude weighting and aperture apodization to improve the beam patterns. In this paper, calculation of the sound field of broad-band waves, which are used more frequently in practice, is emphasized. The results show that the longer the broad-band wave lasts, the more the sound field is similar to that of the single-frequency wave. |
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| Keywords: | directivity function linear array apodization processing sound field |
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