Fetal heart depth detection method based on ultrasonic Doppler technology

Abstract

The invention relates to the technical field of medical diagnosis, in particular to a fetal heart depth detection method based on an ultrasonic Doppler technology, which comprises the following steps of: transmitting an ultrasonic signal to the abdomen of a pregnant woman by using ultrasonic Doppler equipment, receiving the reflected ultrasonic signal, processing the signal by using a Doppler effect principle, and determining the fetal heart depth according to different fetal heart depths; according to the technical scheme, sending and receiving time of ultrasonic signals is adjusted and controlled, ultrasonic signal data collected at different depths are analyzed and calculated, distinguishing of the actual fetal heart depth is achieved, sending and receiving time related parameters of the ultrasonic signals can be flexibly adjusted, and therefore effective detection of the fetal heart signals at different depths is achieved. The accuracy and the applicability of fetal heart signals collected by the ultrasonic Doppler fetus-voice meter are improved, meanwhile, the accuracy and the reliability of fetal heart signal collection are improved, the risk of misjudgment and missed diagnosis is reduced, and the device is easy and convenient to operate, non-invasive, real-time and suitable for various prenatal examination scenes.

Description

Technical Field

[0001] The present invention relates to the field of medical diagnosis technology, and in particular to a method for detecting fetal heart depth based on ultrasonic Doppler technology. Background Art

[0002] Fetal heart rate monitoring is an indispensable part of prenatal examinations and is of great significance for assessing the health of the fetus and preventing fetal distress. Traditional fetal heart rate monitoring methods, such as stethoscope auscultation and electronic fetal heart rate monitors, have problems such as inconvenient operation, susceptibility to interference, and insufficient accuracy.

[0003] As an advanced fetal heart rate detection device, ultrasonic Doppler fetal heart rate monitor has the advantages of being non-invasive, real-time and accurate. However, how to accurately detect fetal heart rate signals at different depths is still a technical problem that needs to be solved. Summary of the invention

[0004] The purpose of the present invention is to provide a method for detecting fetal heart depth based on ultrasonic Doppler technology, so as to solve the problem that ultrasonic Doppler fetal heart monitor cannot accurately detect fetal heart signals at different depths.

[0005] To achieve the above object, the present invention provides a method for detecting fetal heart depth based on ultrasonic Doppler technology, and the method for detecting fetal heart depth based on ultrasonic Doppler technology comprises the following steps:

[0006] Using an ultrasound Doppler device to transmit ultrasound signals to the pregnant woman's abdomen;

[0007] Receive the reflected ultrasonic signal and process the signal using the Doppler effect principle;

[0008] According to different fetal heart depths, adjust and control the sending and receiving time of ultrasonic signals;

[0009] The ultrasonic signal data collected at different depths are analyzed and calculated to distinguish the actual fetal heart depth.

[0010] Among them, in the step of "using an ultrasonic Doppler device to transmit an ultrasonic signal to the abdomen of a pregnant woman", it is assumed that the number of depths required to be measured in one cycle is N, and the depth of each measurement is L. According to the ultrasonic transmission and reception time calculation formula, the ultrasonic transmission and reception time for each measurement is calculated to be T, and the energy value calculated for each depth L is E.

[0011] Among them, in the step of "calculating the ultrasonic transmission and reception time of each measurement as T according to the ultrasonic transmission and reception time calculation formula", the ultrasonic transmission and reception time calculation formula is specifically:

[0012]

[0013] Among them, d is the propagation distance, c is the propagation speed of ultrasound in the human body, and t is the round-trip time of ultrasound.

[0014] Among them, in the step of "the energy value calculated at each depth L is E", the specific steps of calculating the energy value E are: first calculate the root mean square value of the data, and then convert it into decibels based on the root mean square value.

[0015] Among them, in the step of "first calculating the root mean square value of the data", the formula for calculating the root mean square value of the data is:

[0016]

[0017] Where RMS is the root mean square, 2 122 It is to normalize the amplitude value of the signal to a reference value according to the data range.

[0018] Among them, in the step "then convert to decibel according to the root mean square value", the calculation formula of decibel is:

[0019] dB=20log 10 (RMS).

[0020] Among them, in the step of "receiving the reflected ultrasonic signal and performing signal processing using the Doppler effect principle", the received ultrasonic signal needs to be pre-processed before performing signal processing using the Doppler effect principle.

[0021] Among them, after the step of "analyzing and calculating the ultrasonic signal data collected at different depths to distinguish the actual fetal heart depth", the detected fetal heart depth information is recorded in the storage device of the fetal heart monitor for subsequent analysis and research.

[0022] The method for detecting fetal heart depth based on ultrasonic Doppler technology of the present invention can flexibly adjust the parameters related to the sending and receiving time of ultrasonic signals, thereby realizing effective detection of fetal heart signals at different depths, and improving the accuracy and applicability of fetal heart signals collected by ultrasonic Doppler fetal heart monitor. The beneficial effects of the technical solution include: improving the accuracy and reliability of fetal heart signal collection, reducing the risk of misjudgment and missed diagnosis, realizing accurate detection of fetal heart signals at different depths, improving the scope of application and practicality of the fetal heart monitor, and being simple to operate, non-invasive, and real-time, and suitable for various prenatal examination scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 The present invention provides a flowchart of the steps of the method for detecting fetal heart depth based on ultrasonic Doppler technology.

[0025] Figure 2 It is a schematic diagram of the fetal heart depth detection principle provided by the present invention. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] See also Figure 1 and Figure 2 The present invention provides a method for detecting fetal heart depth based on ultrasonic Doppler technology, and the method for detecting fetal heart depth based on ultrasonic Doppler technology comprises the following steps:

[0028] Using an ultrasound Doppler device to transmit ultrasound signals to the pregnant woman's abdomen;

[0029] Receive the reflected ultrasonic signal, pre-process the received ultrasonic signal, and then use the Doppler effect principle to process the signal;

[0030] According to different fetal heart depths, adjust and control the sending and receiving time of ultrasonic signals;

[0031] Analyze and calculate the ultrasonic signal data collected at different depths to distinguish the actual fetal heart depth;

[0032] The detected fetal heart depth information is recorded in the storage device of the fetal heart monitor for subsequent analysis and research.

[0033] In this embodiment, the parameters related to the sending and receiving time of the ultrasonic signal can be flexibly adjusted to achieve effective detection of fetal heart signals at different depths, thereby improving the accuracy and applicability of the ultrasonic Doppler fetal heart rate monitor in collecting fetal heart signals. The beneficial effects of this technical solution include: improving the accuracy and reliability of fetal heart rate signal acquisition, reducing the risk of misjudgment and missed diagnosis, achieving accurate detection of fetal heart signals at different depths, and improving the scope of application and practicality of the fetal heart rate monitor. It is easy to operate, non-invasive, and real-time, and is suitable for various prenatal examination scenarios.

[0034] Furthermore, in the step of "using an ultrasonic Doppler device to transmit an ultrasonic signal to the abdomen of a pregnant woman", assume that the number of depths that need to be measured in one cycle is N, and the depth of each measurement is L (0,1,2...N). According to the ultrasonic transmission and reception time calculation formula, the ultrasonic transmission and reception time for each measurement is calculated to be T (0,1,2...N), and the energy value calculated for each depth L is E (0,1,2...N).

[0035] In this embodiment, the ultrasonic transmission and reception time calculation formula is specifically:

[0036]

[0037] Among them, d is the propagation distance (the one-way distance from the transmitting source to the target tissue), c is the propagation speed of ultrasound in the human body (depending on the tissue type), and t is the round-trip time of ultrasound (the time difference from transmission to reception). Since the ultrasonic Doppler fetal monitor is mainly used for abdominal measurement, the abdomen is mainly composed of blood, fat, kidney, liver, muscle and other tissues. The sound speed of these tissues is usually in the range of 1476-1570m / s. At the same time, the parameter c, that is, the propagation speed of ultrasound in the human body, is known, usually about 1540m / s in soft tissue, so the time of ultrasound transmission and reception can be calculated according to the set d value.

[0038] Furthermore, in the step “the energy value calculated at each depth L is E”, the specific steps for calculating the energy value E are: firstly, the root mean square value of the data is calculated, and then, the root mean square value is converted into decibels.

[0039] In this embodiment, the formula for calculating the root mean square value of the data is:

[0040]

[0041] RMS is the root mean square. Since the data range of the fetal heart signal is 0 to 4095, 122 It is to normalize the amplitude value of the signal to a reference value according to the data range;

[0042] The formula for calculating decibel is:

[0043] dB=20log 10 (RMS).

[0044] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A method for detecting fetal heart depth based on ultrasonic Doppler technology, characterized in that: The steps include: Using an ultrasound Doppler device to transmit ultrasound signals to the pregnant woman's abdomen; Receive the reflected ultrasonic signal and process the signal using the Doppler effect principle; According to different fetal heart depths, adjust and control the sending and receiving time of ultrasonic signals; The ultrasonic signal data collected at different depths are analyzed and calculated to distinguish the actual fetal heart depth.

2. The method for detecting fetal heart depth based on ultrasonic Doppler technology as claimed in claim 1, characterized in that: In the step "using an ultrasonic Doppler device to transmit an ultrasonic signal to the abdomen of a pregnant woman", assume that the number of depths required to be measured in one cycle is N, and the depth of each measurement is L. According to the ultrasonic transmission and reception time calculation formula, the ultrasonic transmission and reception time for each measurement is calculated to be T, and the energy value calculated for each depth L is E.

3. The method for detecting fetal heart depth based on ultrasonic Doppler technology as claimed in claim 2, characterized in that: In the step of "calculating the ultrasonic transmission and reception time of each measurement as T according to the ultrasonic transmission and reception time calculation formula", the ultrasonic transmission and reception time calculation formula is specifically: Among them, d is the propagation distance, c is the propagation speed of ultrasound in the human body, and t is the round-trip time of ultrasound.

4. The method for detecting fetal heart depth based on ultrasonic Doppler technology as claimed in claim 3, characterized in that: In the step "the energy value calculated at each depth L is E", the specific steps for calculating the energy value E are: firstly, the root mean square value of the data is calculated, and then the root mean square value is converted into decibels.

5. The method for detecting fetal heart depth based on ultrasonic Doppler technology as claimed in claim 4, characterized in that: In step "First calculate the RMS value of the data", the formula used to calculate the RMS value of the data is: Among them, RMS is root mean square, ( 2 12 ) 2 It is to normalize the amplitude value of the signal to a reference value according to the data range.

6. The method for detecting fetal heart depth based on ultrasonic Doppler technology as claimed in claim 5, characterized in that: In step "Then convert to decibels based on the RMS value", the decibel calculation formula is: dB=20log 10 (RMS)。 7. The method for detecting fetal heart depth based on ultrasound Doppler technology as claimed in claim 6, characterized in that: In the step of "receiving the reflected ultrasonic signal and performing signal processing using the Doppler effect principle", the received ultrasonic signal needs to be pre-processed before performing signal processing using the Doppler effect principle.

8. The method for detecting fetal heart depth based on ultrasound Doppler technology as claimed in claim 7, characterized in that: After the step of "analyzing and calculating the ultrasonic signal data collected at different depths to achieve the resolution of the actual fetal heart depth", the detected fetal heart depth information is recorded in the storage device of the fetal heart monitor for subsequent analysis and research.

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