Quality evaluation method for ultrasonic Doppler fetal heart signals

Abstract

The invention discloses a quality evaluation method for ultrasonic Doppler fetal heart signals. According to the method, periodic characteristics and energy distribution characteristics of the fetal heart signals are separately extracted through the autocorrelation operation and the calculation of coefficient of variation, and the calculation of a signal quality evaluation index is realized by establishing a characteristic value-signal quality relational model based on a neural network. The method is simple and convenient, easy to implement and capable of effectively evaluating the quality condition of the fetal heart signals and effectively assisting a pregnant woman to find out an appropriate position for fetal heart detection to avoid the situation of detecting interference signals, thus improving the accuracy of fetal heart detection.

Description

technical field [0001] The invention belongs to the technical field of signal quality evaluation, and in particular relates to a quality evaluation method for ultrasonic Doppler fetal heart signal. Background technique [0002] The fetal heart rate can reflect the health of the fetal heart function to a certain extent, and the normal change of the fetal heart rate can indicate that the fetal central nervous system, autonomic nerve regulation function is normal, and the fetal reserve function is good. Fetal heart rate monitoring is one of the main methods of perinatal health monitoring. It can obtain abnormal state information during fetal development, thereby reminding pregnant women to treat in time to ensure the health of pregnant women and fetuses. The application of fetal heart rate monitoring technology can reduce the incidence of fetal distress, fetal brain damage, intrauterine fetal death, neonatal asphyxia and death, and improve the quality of perinatal maternal and ...

AI Technical Summary

Problems solved by technology

[0005] The Chinese patent with application number 201611229064.4 proposes a method and system for determining the best position of fetal heart rate detection, which judges the best position of fetal heart rate detection by combining the best position in previous fetal heart rate detection with the sphere model of fetal development. position, but this method regards the point with the highest signal strength as the best position for fetal heart rate detection, and does not consider the influence of non-fetal heart rate signals, which is susceptible to interference

[0006] The Chinese patent with application number 201610069686.9 proposes a method and device for determining the position of the probe in fetal monitoring equipment. It judges whether the probe is in the The optimal fetal heart position, but this method uses the change trend of the signal period difference as the signal correlation degree, which is not suitable for low signal-to-noise ratio situations, and the anti-interference signal ability is poor. In addition, only the signal amplitude and signal period are considered, which is vulnerable to The interference of the umbilical cord blood flow sound, which is also a periodic signal, affects the fetal heart rate detection

[0007] The above methods are helpful to find the best position for fetal heart rate detection to a certain extent, but they are easily affected by interference signals and have certain limitations.

Images