文章摘要
孙俊霞,寿文德,王鸿樟.B超诊断仪凸阵阵元高度方向复合聚焦声场的研究[J].声学技术,2001,(1):20~23
B超诊断仪凸阵阵元高度方向复合聚焦声场的研究
Study of complex focusing acoustic field in the element elevation direction of convex array of ultrasonic diagnostic B-scanner
投稿时间:1999-11-26  修订日期:2000-05-17
DOI:
中文关键词: 复合聚焦  凸阵  声透镜
英文关键词: complex focusing  convex array  sound lens
基金项目:
作者单位
孙俊霞 上海交通大学生物医学工程系, 上海 200030 
寿文德 上海交通大学生物医学工程系, 上海 200030 
王鸿樟 上海交通大学生物医学工程系, 上海 200030 
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中文摘要:
      文章研究B超诊断仪凸阵阵元高度方向复合聚焦声场的计算并推导了方便实用的计算公式.然后进行了实验和数值计算,实验结果与理论预测相当吻合,偏差不超过7%.最后在计算机上进行数值仿真,进一步研究了声透镜的几何参数影响声场参数的规律.
英文摘要:
      Focusing is an effective method to improve the resolution of transducer.Usually there are two approaches to focus,one is to use piezoelectrical component with curve shapes,the other is to use lens.In this paper,the complex focusing of two approaches is studied and a better and feasible algorithm of the focusing acoustic field in the element height direction and in axial direction of ultrasonic diagnostic B scanner is presented.Lens shapes are descirbed and the field parameters are numerically computed.The model results were compared to experimental measurements.It indicates that the experimental and model results are in close agreement,and the deviation between them is less than 7%.After that,by means of altering the geometric parameters of transducer,the better shape of lens and summarized regularities of sound field are obtained.
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