Golay互补序列在眼科超声生物测量中的应用  

Application of Golay-coded pulse excitation in ophthalmological ultrasound biometer

作　　者：王晓春[1] 周盛[1] 计建军[1] 杨军[1] 王延群[1] 

机构地区：[1]中国医学科学院生物医学工程研究所,天津300192

出　　处：《北京生物医学工程》2015年第1期38-42,95,共6页Beijing Biomedical Engineering

基　　金：国家科技支撑计划课题(2012BAI13B02);中央级公益性科研院所基本科研业务专项资助

摘　　要：目的本研究拟在眼科超声生物测量中采用编码激励技术降低超声发射电压,以替代传统的单脉冲激励。方法采用Golay互补序列编码序列激励,通过对接收回波进行相应的解码压缩和信号处理,使得发射电压由60 V降低至±15 V,设计了单反射面、分辨率测量和在体实验来验证该方法的有效性。结果实验结果表明,编码激励技术虽降低了超声发射电压,但仍可保持与高发射电压时同样的探测深度、信号强度、分辨率和测量精度。结论编码激励的方法对于降低超声波的瞬时发射功率,使声输出参数满足相关检测标准,实现眼部生物组织的准确测量具有深远的意义。Objective This paper intends to use coded excitation technique in ophthalmological ultrasound hiometer to cut down the emission voltage in order to substitute the traditional single pulse excitation. Methods The Golay complementary sequences were adopted for coded excitation and the echoes were compressed accordingly. By this method,the excitation voltage could be cut down from 60 V to ＋ 15 V. The one-reflector experiment,the resolution measuring experiment and an in vivo experiment were designed in this paper to verify the effectiveness of the method. Results The results showed that when we cut down the excitation voltage by using Golay-coded pulse excitation, we could maintain the same detective depth, signal intensity,resolution and measurement accuracy as the high excitation voltage. Conclusions The coded excitation can reduce the ultrasonic instantaneous emission power and meet the related detection requirements of acoustic output parameters, which has profound significance in the realization of accurate measurement for ophthalmological tissues.

关 键 词：GOLAY码 超声 生物测量 编码激励 

分 类 号：R318.6[医药卫生—生物医学工程]