| 一种基于相对声程差的高精度逐点聚焦实现方法 |
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| 引用本文： | 王平,高阳,范文政,王林泓,何为,许琴.一种基于相对声程差的高精度逐点聚焦实现方法[J].声学学报,2012,37(5):508-515. |
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| 作者姓名： | 王平 高阳 范文政 王林泓 何为 许琴 |
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| 作者单位： | 1 重庆大学 输配电装备及系统安全与新技术国家重点实验室 重庆 400044; |
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| 基金项目： | 广东省教育部产学研结合项目(2008B090500272)、重庆大学研究生科技创新基金个人项目(CDJXS11150009)和第四届国家大学生创新性实验项目(101061117)资助的课题。 |
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| 摘 要： | 针对超声成像逐点聚焦延时参数容量大、工程实现困难的问题,提出一种基于相对声程差的高精度逐点聚焦实现方法。该方法对逐点聚焦延时参数进行分解,压缩存储,并在逐点聚焦过程中实时解压生成聚焦延时参数,用于高精度的逐点聚焦中。为了验证该方法,本文以128阵元16通道的凸阵探头为例,进行了相关的数学推导和证明。在此基础上,给出了基于FPGA(Field Programmable Gate Array)的高精度逐点聚焦模块的硬件实现原理框图,并对该逐点聚焦方法的性能进行了分析讨论,验证了该方法的优越性。
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| 收稿时间： | 2011-09-15 |
A high precision algorithm for dynamic focusing based on relative acoustic path difference in ultrasound imaging |
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| Institution: | 1 State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University Chongqing 400044;2 Chongqing College Electronic Engineering Chongqing 400044 |
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| Abstract: | Aiming at the problem of the extensive data storage and difficult to be implemented for dynamic receive focusing in ultrasound imaging, a method based on relative acoustic path difference is proposed. The core of this method is the decomposition and compression storage, and realization of high precision point-by-point focusing delay with realtime generation algorithm for focusing delay parameters. Take 16-channel 128-element convex array of transducers for example, the related mathematical derivation and the block diagram of point-by-point focusing module in FPGA (Field Programmable Gate Array) are given out. At last, the superiority of the proposed algorithm is analyzed and discussed. |
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