基于m码码型变换提高多普勒血流测速分辨力的新方法  

A New Method to Enhancing the Resolution of Doppler Flow Measurement Based on Improved m Code

作　　者：俞俊鑫[1] 肖杨[1] 余建国[1] 

机构地区：[1]复旦大学电子工程系,上海200433

出　　处：《复旦学报（自然科学版）》2008年第6期773-780,共8页Journal of Fudan University：Natural Science

基　　金：上海市重点学科建设资助项目(B112)

摘　　要：为了提高多普勒血流测速的分辨力,提出了一种基于m码的新的编解码调制方法.通过回波波形、稳恒流、脉动流的仿真实验证实,本算法能较精确地测得指定区域的血流速度,性能明显优于Shiozaki算法和标准m码算法,可以提高多普勒血流测速的精度.A novel coding and decoding method based on the pseudo-random code is proposed to improve the resolution of Doppler flow measurement.The simulations of echo signals,steady streams and pulsatile flows are carried out to validate this method.It is shown that the flow speed in the desired region can be measured with good precision,much better than that of the Shiozaki method and standard m-code method.Therefore,this coding and decoding method is an efficient one to improve the precision of Doppler flow measure...

关 键 词：超声多普勒 m码 血流速度 

分 类 号：R445.1[医药卫生—影像医学与核医学]