利用射频信号解卷积估计组织和血流运动速度  

Estimation of velocities of tissue motion and blood flow based on radio frequency signal deconvolution

作　　者：陈功[1] 于洁[1] 宋富先[2] 章东[2] 

机构地区：[1]江苏省中医院,南京210029 [2]南京大学声学研究所近代声学教育部重点实验室,南京210093

出　　处：《声学技术》2010年第2期171-175,共5页Technical Acoustics

基　　金：教育部新世纪人才计划资助项目(06-0450)

摘　　要：基于射频信号解卷积,提出了一种无需MTI(Moving Target Indicator)滤波重建血流及组织运动速度的方法。对射频回波的采样序列进行快速傅里叶变换,在频域对相邻两次射频回波的频谱作解卷积处理,通过分析解卷后的数值序列得到组织和血流各自的运动速度。仿真实验对两组典型的时延参数的超声回波信号进行了血流和组织速度的估算,并与给定值比较,证明了方法的有效。该方法有助提高超声血流成像系统对低速血流的测量精度。A novel approach based on radio frequency signal deconvolution is developed to estimating the velocities of blood flow and tissue motion without MTI filtering.In this method,the sampled sequences of the radio frequency echoes are transformed to the frequency domain by FFT algorithm firstly.Then these transformed sequences are deconvolved.Finally the velocities of the blood flow and the tissue motion can be obtained by a spectrum analysis of these deconvolved sequences.This approach has been applied to the simulated ultrasound echoes with two typical time-delay parameter sets.The validity of this method is examined by the comparison between the estimated velocities of blood and tissue motion and the given values.This approach is helpful to the measurement of the low-velocity blood flows.

关 键 词：彩色血流估计 解卷积 时延估计 杂波抑制 

分 类 号：R318.04[医药卫生—生物医学工程]