随机相位编码抑制微波医学成像中RFI的研究

基金项目:

国家留学基金(2007A55018)

详细信息

Research on Phase Random Coding to Suppress RFI in Microwave Medical Imaging System

School of Electronic Engineering,University of Electronic Science and Technology of China Chengdu 610054

摘要: 射频干扰是影响微波医学成像质量的重要因素。分析了射频干扰对单频连续波成像系统的影响机理,针对同频率射频干扰问题,利用系统激励信号源和干扰信号源不相关的特点,提出对系统激励信号源初始相位按零均值随机相位编码的方法,可以将同频率干扰转变为零均值随机信号,进而再采用传统的均值滤波算法进行抑制。以乳腺癌二维微波医学成像为例,通过仿真成像实验验证了该方法的有效性。
- 微波医学成像 /
- 牛顿迭代算法 /
- 随机相位编码 /
- 射频干扰
Abstract: The radio frequency interference (RFI) is a dominant factor to degrade the image quality in microwave medical imaging systems. This paper analyzes the effects of RFI incurred in microwave medical imaging systems, and proposes a phase random coding method to transform RFI into zero mean random signal. The RFI can be suppressed easily using traditional mean value filter algorithm. A set of 2D breast cancer imaging experiments with simulated data demonstrate the proposed method is feasible and effective.
- microwave medical imaging /
- Newton iterative algorithm /
- phase random coding /
- radio frequency interference