Title :
A new method for Doppler clutter rejection based on irregular sampling and iterative spline reconstruction
Author :
Tao, Qian ; Wang, Yuan-Yuan ; Wang, Wei-qi
Author_Institution :
Dept. of Electron. Eng. Dept., Fudan Univ., Shanghai, China
Abstract :
The low frequency and high amplitude clutter signal constitutes a great disturbance for the discrimination of low velocity blood flow signals in a Doppler ultrasound measurement system. In this letter, a novel method for clutter rejection is proposed, incorporating irregular sampling and iterative reconstruction by cubic spline. Experimental results indicate this approach outperforms the traditional way of high-pass filtering with its effective elimination of clutter and preservation of low velocity blood component in the overlapped frequency region.
Keywords :
acoustic signal detection; biomedical ultrasonics; clutter; haemodynamics; interference suppression; iterative methods; medical signal processing; signal reconstruction; signal sampling; splines (mathematics); Doppler clutter rejection; Doppler ultrasound measurement system; blood flow signals; clutter signal; irregular sampling; iterative reconstruction; iterative spline reconstruction; Blood flow; Filtering; Fluid flow measurement; Frequency measurement; Iterative methods; Sampling methods; Spline; Ultrasonic imaging; Ultrasonic variables measurement; Velocity measurement; Clutter; Doppler; cubic spline; irregular sampling; iterative; reconstruction;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2004.833475
