Although the filtering method in frequencydomain can solve the time variant filtering problem based on Fourier transform, the method may appear a false anomaly in conjunct part between Windows.
The paper presents a method of motion curve frequencydomainfiltering in Omni-directional M-mode echocardiography images based on Discrete Fourier Transform (DFT).
介绍一种基于离散傅里叶变换(DFT)的全方向M型超声心动图运动曲线频域滤波技术。
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Based on single magnetic dipole model, the spatial filtering method of cardiac magnetic signal in the frequencydomain was investigated.