An adaptive clutter rejection filter in ultrasound color flow imaging systems

Zhigang Pei, Naizhang Feng, Yi Shen, Qiang Wang
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引用次数: 1

Abstract

In ultrasound color flow imaging systems, the imaging quality is highly influenced by the clutter originating from the vascular wall, stationary and slowly moving tissue. Moreover, in practice, relative motion between the probe held by doctor and the blood flow also induce the clutter along with blood flow. If there is not clutter rejection, the estimation value of low velocity blood flow will be inaccurate, and the CFM imaging quality will be poor. In this paper a new adaptive filtering scheme is introduced. In this scheme statistical theory is used to calculate the mean frequency and variance of clutter signal. The mean frequency is used to mix down the Doppler signal, and the variance determines the filter's cut-off frequency. So it achieves the adaptability of the clutter rejection filter and improves the accuracy and flexibility of the ultrasound devices.
超声彩色血流成像系统中的自适应杂波抑制滤波器
在超声彩色血流成像系统中,来自血管壁、静止组织和缓慢运动组织的杂波对成像质量影响很大。此外,在实际操作中,医生手持的探头与血流之间的相对运动也会产生伴随血流的杂波。如果没有杂波抑制,低速血流估计值将不准确,CFM成像质量将较差。本文提出了一种新的自适应滤波方案。该方案利用统计理论计算杂波信号的平均频率和方差。平均频率用于混合多普勒信号,方差决定滤波器的截止频率。实现了杂波抑制滤波器的自适应性,提高了超声器件的精度和灵活性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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