文章摘要
刘鹏华,戴明远.医用线列阵声场计算方法[J].声学技术,2004,(3):163~167
医用线列阵声场计算方法
Methods for calculating acoustic fields of medical linear array
投稿时间:2003-12-30  修订日期:2004-03-30
DOI:
中文关键词: 指向性函数  线列阵  变迹处理  声场
英文关键词: directivity function  linear array  apodization processing  sound field
基金项目:
作者单位
刘鹏华 同济大学信息与通信工程系, 上海, 200092 
戴明远 同济大学信息与通信工程系, 上海, 200092 
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中文摘要:
      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。
英文摘要:
      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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