北京生物医学工程2012，Vol.31Issue(1)：26-30,5.DOI:10.3969/ j.issn. 1002-3208(2012)01.06.
一种新型自适应动态滤波器在超声成像中的应用
Application of a new self-adaptive dynamic filter in ultrasound imaging system
摘要
Abstract
Objective A new self-adaptive dynamic filter in ultrasound imaging system was proposed to match the center frequency of the dynamic filter and the real echo in real time. Methods The tast Fourier transtorm(FFT) processor was used to analyze each small section of the echo and the frequency characteristic of the real echo deciding the factors of the filter in the self-adaptive mechanism. The realization of the system based on field programmable gate array(FPGA) was analyzed and the design was carried on by Modelsim as the timing simulation tool dealing with sinusoidal signals doped with white noise. Results The simulation results showed that the self-adaptive dynamic filter could reduce the noise strongly as the method could match the center frequency of the near field and far field real echo precisely. Conclusions The new self-adaptive dynamic filter is tast enough tor processing high-speed and real-time signals,providing one basis tor designing the filter in ultrasongraphy.关键词
超声成像/可编程门阵列/快速傅里叶变换/动态滤波/滤波器/自适应Key words
ultrasonic image/ field programmable gate array/tast Fourier transform/ dynamic filtering/ filter/ self-adaptive分类
医药卫生引用本文复制引用
王文芳,周盛,王晓春,王立伟,王延群..一种新型自适应动态滤波器在超声成像中的应用[J].北京生物医学工程,2012,31(1):26-30,5.基金项目
天津市科技计划项目(07ZCKFSF01400)资助 （07ZCKFSF01400）
