Single channel abdominal recording fetal electrocardiogram extraction method

An extraction method and electrocardiogram technology, applied in the directions of diagnostic recording/measurement, medical science, sensors, etc., can solve problems such as inconvenience of movement and discomfort of pregnant women, and achieve the effect of improving comfort

Inactive Publication Date: 2019-04-05
BEIJING UNIV OF TECH
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Problems solved by technology

In the application of fetal ECG signal extraction, the BP neural network can extract clear fetal ECG signals, but the network not only needs to collect maternal abdominal ECG, but also needs to collect maternal chest ECG. Discomfort and reduced mobility

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  • Single channel abdominal recording fetal electrocardiogram extraction method
  • Single channel abdominal recording fetal electrocardiogram extraction method
  • Single channel abdominal recording fetal electrocardiogram extraction method

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Embodiment Construction

[0037] The extraction process is described in detail with reference to the accompanying drawings and practical examples. The data used are the second channel data obtained from the ADFECGDB database. The following is a step-by-step introduction:

[0038] 1. The sampling rate of the ADFECGDB database is 1000Hz, and the sampling time is 30min. The first channel signal is the fetal ECG signal, and the second to fifth channels are the mixed signals of the maternal abdomen. Since the signal was disturbed by baseline drift during the acquisition process, the signal was denoised, and a third-order Butterworth filter was used to estimate the baseline signal, and the baseline signal was subtracted from the original signal to obtain a maternal abdominal mixed signal without baseline drift ,Such as Figure 5 shown;

[0039] 2. Use SVD and SW to construct the maternal chest ECG signal;

[0040]1) Use the adaptive threshold method to detect the maternal ECG R wave position, such as F...

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Abstract

The invention discloses a single channel abdominal recording fetal electrocardiogram extraction method. The single channel abdominal recording fetal electrocardiogram extraction method includes the following steps that (1) a signal is collected in an abdomen of a mother body, the signal is preprocessed to remove baseline drift, and the denoised signal is taken as a network target signal; (2) an electrocardiogram component of the mother body is estimated through singular value decomposition (SVD) and a smooth window (SW), and the estimated electrocardiogram component of a chest of the mother body is taken as a network input signal; (3) then a back propagation (BP) neural network is constructed, a hidden layer is arranged as 15 neurons, the number of iterations is 500, the learning rate is arranged as 0.1, and the target error is 0.000001; and (4) the BP neural network method is used for training a network, a network template is obtained, and then a fetal electrocardiogram signal is extracted. According to the single channel abdominal recording fetal electrocardiogram extraction method, the clear fetal electrocardiogram signal can be obtained by collecting an abdomen leading mixed signal, the inconvenience of chest electrocardiogram collection to pregnant women is avoided, and certain value in practical application is achieved.

Description

technical field [0001] The invention belongs to the technical field of fetal electrocardiogram signal detection, in particular to a method for extracting fetal electrocardiogram recorded in a single-channel abdomen, which is a modified technique for extracting fetal electrocardiogram signals by a traditional neural network. Background technique [0002] Fetal monitoring is currently an important means to ensure the safety of perinatal pregnant women and fetuses and to achieve eugenics. During the perinatal period, the fetus is temporarily hypoxic due to umbilical cord compression or other reasons, which can cause asphyxia, mental retardation, dementia and even death. According to statistics, a large part of mentally handicapped children in our country is caused by dysplasia or premature birth due to hypoxic distress during fetal growth, and 25% of fetal deaths can also be avoided. As the society attaches great importance to the health of mothers and babies, the monitoring o...

Claims

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Application Information

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IPC IPC(8): A61B5/0444A61B5/344
CPCA61B5/7225A61B5/7264A61B5/344
Inventor 吴水才袁丽白燕萍
Owner BEIJING UNIV OF TECH
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