Barker编码激励在眼科高频超声成像中的应用研究

Ophthal Mological High-Frequency Ultrasound Imaging Using Barker-Coded Pulse Excitation

为了平衡医学高频超声成像中纵向分辨率和探测深度这两项指标之间的矛盾,本研究提出了在眼科超声成像中,采用13位Barker数字编码激励并结合失配滤波解码压缩方法替代传统的单脉冲激励的方法。在对比各种编解码方式的优缺点的基础上,构建了眼科超声成像平台。仿真和实验结果表明,失配滤波解码技术的输出信号主副比是匹配滤波的9.7倍。与传统的单脉冲成像在安全性、分辨率、探测深度等方面比较,编码激励技术能有效地改善眼部组织超声成像的效果,具有较强的实际应用价值和市场前景。

In order to compromise the axial resolution and detection depth in high-frequency ultrasound imaging, this paper proposed a method, introducing the 13 bit Barker-coded excitation and mismatched filter to ophthalmic ultrasonic imaging, instead of the traditional one using one pulse excitation, After comparing various codes and encoding methods, a platform was designed experiment results showed that the high peak side lobe matched filter. Compared to the traditional pulse for ophthalmic ultrasonic imaging. The simulated and lever of mismatched filter was 9.7 times of that using excitation system, coded excitation has significant improvement safety, resolution and detecting depth.