Interactive method for rapidly and automatically extracting fetus electrocardio

Abstract

The invention relates to an interactive method for rapidly and automatically extracting fetus electrocardio. The interactive method includes the steps that electrocardio signals at the abdomen of a parent body are preprocessed, and power frequency interference and high-frequency noise interference which are relatively easy to filter are removed; smooth and steady wavelet time-frequency transformation is carried out on the preprocessed electrocardio signals at the abdomen of the parent body; feature extraction is carried out on wavelet detail coefficients; features related to contents of the electrocardio signals at the abdomen of the parent body are detected, and a parent body electrocardio template is constructed; and the constructed parent body electrocardio template is removed from the preprocessed electrocardio signals at the abdomen of the parent body so as to obtain fetus electrocardio signals. According to the interactive method for rapidly and automatically extracting the fetus electrocardio, the smooth and steady wavelet time-invariant feature is adopted; the position of parent body electrocardio and the position of the fetus electrocardio can be accurately positioned; the extracted fetus electrocardio data have the high accuracy rate when being used for fetus heart rate detection; in addition, according to an interactive feature automatic detection method, in cooperation with the construction of the parent body electrocardio template, needed circulation is less, the calculating speed is high, and the interactive method can meet the real-time processing requirement and can be suitable for extracting the fetus electrocardio from the electrocardio in the abdomens of different pregnant women.

Description

technical field [0001] The invention belongs to the technical field of non-invasive fetal electrocardiographic signal processing in medical equipment, and in particular relates to a method for automatically and rapidly extracting pure fetal electrocardiographic signals from a path of low signal-to-noise ratio maternal abdominal electrocardiographic signals. Background technique [0002] The working principle of the non-invasive fetal ECG monitor is mainly to measure the analog ECG signal through the external electrodes of the mother's abdomen, and use the analog-to-digital conversion module to convert the analog signal into a digital signal, and then process the digital maternal abdominal signal through the corresponding algorithm. Extract pure fetal ECG signals, and finally perform feature extraction on the extracted fetal ECG signals, and provide the extracted features to doctors for diagnosis. From a functional point of view, the fetal ECG monitor needs to extract pure fe...

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Problems solved by technology

[0008] The purpose of the present invention is to address the above-mentioned problems and deficiencies, to provide a method that is easy to operate, has good stability, and has a simple algorithm model structure and high extraction accuracy, which can effectively solve the problem of being difficult to transplant and apply to real-time applications in the algorithm based on wavelet extraction of fetal ECG signals. An interactive method for fast and automatic extraction of fetal ECG with disadvantages of fetal ECG monitoring system

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