超声多普勒回波信号瞬时幅度和瞬时频率估计的新方法  

A New Method of Instantaneous Amplitude and Frequency Estimations for Doppler Ultrasound Signal

作　　者：张春晓[1] 程敬之[1] 火焰 陈思平 

机构地区：[1]西安交通大学 [2]复旦大学 [3]深圳安科公司

出　　处：《西安交通大学学报》1997年第1期63-68,共6页Journal of Xi'an Jiaotong University

摘　　要：对脉冲超声多普勒回波信号模型进行了改进，并在改进模型的基础上，提出了一种基于非线性能量算子ψ的检测超声多普勒回波信号瞬时幅度和瞬时频率的方法．该方法具有跟踪信号瞬态变化的能力，计算量小，很容易做到实时．仿真结果和对颈动脉超声多普勒回波信号的分析，都证明了该方法的可行性．An improved pulsed Doppler ultrasound signal model is proposed. A new method based on nonlinear energy operator Ψ is employed to detect instantaneous amplitude and instantaneous frequency of Doppler ultrasound signal. This method has the merit of tracking the amplitude and frequency varying of Doppler signal instantaneously and correctly with low computational complexity. It is also easy to be implemented. The results both in vitro and in vivo experiments prove that this method has good performance.

关 键 词：超声多普勒 瞬时频率 超声诊断 回波信号 

分 类 号：R445.1[医药卫生—影像医学与核医学]