Multi-parameter fusion correction method and system for ultrasonic examination in uterine cavity of pregnant woman

Abstract

The invention discloses a multi-parameter fusion pregnant woman intrauterine ultrasonic examination correction method and system. The method comprises the steps that multiple pieces of biparietal diameter data of a fetus to be corrected are collected through pregnant woman intrauterine ultrasonic examination; the collected data are verified; calculating the average value of the double top diameter measurement values of the standard cross section in the acquired data; preliminarily correcting the average value of the standard cross section double-top diameter measurement values of the fetus to be corrected based on the upper cross section double-top diameter measurement value and the lower cross section double-top diameter measurement value; performing Bayesian posteriori correction on the preliminary correction result based on corresponding first double-top diameter data in a historical database of the same gestational week; storing in a historical database; according to the method, the ultrasonic examination in the uterine cavity of the pregnant woman is corrected through multi-parameter fusion, and result deviation caused by improper selection of a single standard cross section or measurement errors is avoided, so that the accuracy of double top diameter measurement is improved, and the growth condition of a fetus is judged more accurately.

Description

Technical Field

[0001] The present invention relates to the field of medical ultrasound, and relates to, but is not limited to, a method and system for correcting ultrasonic examination in the uterine cavity of pregnant women with multi-parameter fusion. Background Art

[0002] Measuring the biparietal diameter of a fetus by ultrasound is a key technology for obstetric ultrasound to evaluate the growth and development of a fetus. When measuring the biparietal diameter, usually a doctor finds a standard transverse section for measurement. The doctor uses techniques such as rotation and tilting to find the best measurement section. However, the fetus is in a constantly moving state in the mother's body, and the change of its body position will affect the doctor's acquisition of the standard section; factors such as the mother's body type, abdominal wall fat thickness, and uterine position may also affect the quality of the ultrasound image. Furthermore, the measurement accuracy is reduced. The biparietal diameter of a fetus is a common biometric index in ultrasonic examination. The biparietal diameter refers to the distance between the widest parts on the left and right sides of the fetal head. The biparietal diameter is a direct index for evaluating the size of the fetal head. It reflects the transverse development of the fetal head and is an important parameter for judging whether the fetal head is developing normally. At the same time, it can also reflect the overall size and growth rate of the fetus and the development of the fetal brain. The biparietal diameter has wide application value in prenatal ultrasound examination, and can help doctors detect fetal developmental abnormalities in time and take corresponding intervention measures. Currently, the measurement of the biparietal diameter is mainly completed through ultrasonic examination. The doctor adjusts the ultrasonic probe, determines the position of the fetal head according to the fetal orientation, and finds a transverse section in the occipitofrontal direction passing through the fetal thalamus. Under this section, structures such as the cerebral midline, thalamus, and septum pellucidum can be displayed. The two cerebral hemispheres are symmetrical, the cerebral falx is centered, the echo is continuous, only the middle part is separated by the thalamus and the septum pellucidum, the bilateral lateral ventricles and the surrounding white matter of the brain and the cerebral cortex can be seen, the cerebellum cannot be seen, and at the same time, the strong echo elliptical ring of the skull can be completely displayed; then the image is enlarged, and it is required that the maximum diameter of the target section structure occupies more than 1 / 3 of the vertical diameter of the image (the target section occupies about 3 / 4 of the screen). On the standard section, using the electronic caliper of the ultrasonic instrument, measure the maximum diameter line perpendicular to the midline from the outer edge of one parietal bone to the inner edge of the opposite parietal bone, which is the biparietal diameter. The existing technology is highly dependent on the doctor's experience and is easily affected by maternal factors, resulting in errors in the measurement results. To solve the defects of the existing technology, the present invention provides a method and system for correcting ultrasonic examination in the uterine cavity of pregnant women with multi-parameter fusion. Summary of the Invention

[0003] In view of this, an embodiment of the present invention provides a method and system for correcting ultrasonic examination in the uterine cavity of pregnant women with multi-parameter fusion, aiming to solve problems such as the existing technology being highly dependent on the doctor's experience and being easily affected by maternal factors, resulting in errors in the measurement results.

[0004] The technical solution of the embodiment of the present invention is realized as follows: An embodiment of the present invention provides a correction method for ultrasonic examination of the pregnant woman's uterine cavity with multi-parameter fusion. The method includes: collecting multiple biparietal diameter data of the fetus to be corrected through ultrasonic examination of the pregnant woman's uterine cavity; verifying the collected data; the biparietal diameter data includes: the measured value of the biparietal diameter of the standard transverse section, the measured value of the biparietal diameter of the upper transverse section, the measured value of the biparietal diameter of the lower transverse section, and the gestational week; calculating the average value of the measured values of the biparietal diameter of the standard transverse section in the collected data; preliminarily correcting the average value of the measured values of the biparietal diameter of the standard transverse section of the fetus to be corrected based on the measured values of the biparietal diameter of the upper transverse section and the measured values of the biparietal diameter of the lower transverse section; performing Bayesian posterior correction on the preliminary correction result based on the corresponding first biparietal diameter data in the historical database of the same gestational week; storing it in the historical database; each biparietal diameter data in the historical database includes: the average value of the measured values of the biparietal diameter of the standard transverse section, the gestational week, the preliminary correction result, and the Bayesian posterior correction result. In a specific embodiment, the verifying the collected data includes the following steps: judging whether each piece of data in the collected data is complete according to the content of the biparietal diameter data, and if a missing value is found, reminding the doctor to supplement the data; using a data cleaning tool to de-duplicate and remove abnormal data from the collected data, and at the same time verifying the logical consistency of the data. In a specific embodiment, the preliminarily correcting the average value of the measured values of the biparietal diameter of the standard transverse section of the fetus to be corrected based on the measured values of the biparietal diameter of the upper transverse section and the measured values of the biparietal diameter of the lower transverse section includes the following steps: calculating the average value of the measured values of the biparietal diameter of the upper transverse section and the average value of the measured values of the biparietal diameter of the lower transverse section in the collected data; the average deviation of the upper transverse section compared with the standard transverse section is expressed by the following formula: ; where is the average deviation of the upper transverse section compared with the standard transverse section; is the average value of the measured values of the biparietal diameter of the upper transverse section; B is the average value of the measured values of the biparietal diameter of the standard transverse section of the collected data; the average deviation of the lower transverse section compared with the standard transverse section is expressed by the following formula: ; where is the average deviation of the lower transverse section compared with the standard transverse section; is the average value of the measured values of the biparietal diameter of the lower transverse section; B is the average value of the measured values of the biparietal diameter of the standard transverse section of the collected data; the preliminary correction result is expressed by the following formula: ; where is the preliminary correction result; B is the average value of the measured values of the biparietal diameter of the standard transverse section of the collected data; is the average deviation of the upper transverse section compared with the standard transverse section; is the average deviation of the lower transverse section compared with the standard transverse section; and is the weight coefficient, which is determined by linear regression analysis based on the gestational age. In a specific embodiment, the Bayesian posterior correction of the preliminary correction result based on the first biparietal diameter data corresponding to the historical database of the same gestational age includes the following steps: Determine the prior mean and prior standard deviation corresponding to the current gestational age based on the average value of the standard transverse section biparietal diameter measurement values at the same gestational age in the historical database; calculate the first measurement error standard deviation based on the average value of the standard transverse section biparietal diameter measurement values in the historical database and the preliminary correction result in the historical database, and convert it to the logarithmic scale to make it closer to the normal distribution on the logarithmic scale; The overall mean of the logarithmic standard deviation is represented by the following formula: ; where, is the overall mean of the logarithmic standard deviation; n is the number of groups of gestational ages in the historical database; is the first measurement error standard deviation of the i-th group of gestational ages; The overall standard deviation of the logarithmic standard deviation is represented by the following formula: ; where, is the overall standard deviation of the logarithmic standard deviation; n is the number of groups of gestational ages in the historical database; is the first measurement error standard deviation of the i-th group of gestational ages; randomly generate a logarithmic standard deviation sample value with a normal distribution for the collected data based on the overall mean and the overall standard deviation of the logarithmic standard deviation; Calculate the second measurement error standard deviation based on the generated logarithmic standard deviation sample value; Obtain the Bayesian posterior correction result based on the average value of the standard transverse section biparietal diameter measurement values in the collected data, the preliminary correction result, the prior standard deviation, and the second measurement error standard deviation. In a specific embodiment, the Bayesian posterior correction result is represented by the following formula: ; where, B is the average value of the standard transverse section biparietal diameter measurement values of the collected data; is the preliminary correction result; is the prior standard deviation; is the second measurement error standard deviation; It is the Bayesian posterior correction result. On the other hand, an embodiment of the present invention provides a multi-parameter fusion correction system for ultrasonic examination in the uterine cavity of pregnant women. The system includes: a data acquisition module, configured to collect multiple biparietal diameter data of the fetus to be corrected through ultrasonic examination in the uterine cavity of pregnant women; verify the collected data; the biparietal diameter data includes: the measured value of the biparietal diameter of the standard transverse section, the measured value of the biparietal diameter of the upper transverse section, the measured value of the biparietal diameter of the lower transverse section, and the gestational week; a preliminary correction module, configured to calculate the average value of the measured values of the biparietal diameter of the standard transverse section in the collected data; preliminarily correct the average value of the measured values of the biparietal diameter of the standard transverse section of the fetus to be corrected based on the measured value of the biparietal diameter of the upper transverse section and the measured value of the biparietal diameter of the lower transverse section; a Bayesian posterior correction module, configured to perform Bayesian posterior correction on the preliminary correction result based on the corresponding first biparietal diameter data in the historical database of the same gestational week; store it in the historical database; each biparietal diameter data in the historical database includes: the average value of the measured values of the biparietal diameter of the standard transverse section, the gestational week, the preliminary correction result, and the Bayesian posterior correction result.

[0005] The beneficial effects brought by the technical solutions provided in the embodiments of the present application at least include: In the embodiment of the present invention, the ultrasonic examination in the uterine cavity of pregnant women is corrected through multi-parameter fusion, avoiding the result deviation caused by improper selection of a single standard transverse section or measurement error, thereby improving the accuracy of biparietal diameter measurement, and further more accurately judging the growth of the fetus. The prior art relies strongly on the experience of doctors and is easily affected by maternal factors, resulting in measurement errors. To solve the defects of the prior art, the present invention provides a multi-parameter fusion correction method and system for ultrasonic examination in the uterine cavity of pregnant women. Description of the Drawings

[0006] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where: Figure 1 It is the flowchart of a multi-parameter fusion correction method for ultrasonic examination in the uterine cavity of pregnant women provided by an embodiment of the present invention; Figure 2 It is the system block diagram of a multi-parameter fusion correction system for ultrasonic examination in the uterine cavity of pregnant women provided by an embodiment of the present invention. Detailed Embodiments

[0007] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0008] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0009] It should be noted that the terms "first / second / third" involved in the embodiments of the present invention are only used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first / second / third" can be interchanged with a specific order or sequence when permitted, so that the embodiments of the present invention described here can be implemented in an order other than that illustrated or described here.

[0010] Those skilled in the art of the present technology can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used here have the same meaning as the general understanding of those of ordinary skill in the art in the field to which the embodiments of the present invention belong. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0011] Embodiment 1 Please refer to Figure 1 , Figure 1It is a method flowchart of a calibration method for ultrasonic examination in the uterine cavity of pregnant women with multi-parameter fusion. This embodiment provides a calibration method for ultrasonic examination in the uterine cavity of pregnant women with multi-parameter fusion, including: Step S1, collecting multiple biparietal diameter data of the fetus to be calibrated through ultrasonic examination in the uterine cavity of pregnant women; verifying the collected data; the biparietal diameter data includes: standard transverse section biparietal diameter measurement value, upper transverse section biparietal diameter measurement value, lower transverse section biparietal diameter measurement value, gestational week; specifically, the standard transverse section biparietal diameter measurement value: The doctor adjusts the ultrasonic probe to find the transverse section in the occipitofrontal direction passing through the fetal thalamus, ensuring that this section can clearly display structures such as the midline of the brain, thalamus, and septum pellucidum; then magnify the image, requiring that the maximum diameter of the target section structure occupies more than 1 / 3 of the vertical diameter of the image (the target section occupies about 3 / 4 of the screen). On the standard section, use the electronic caliper of the ultrasonic instrument to measure from the outermost edge of one side of the skull to the outermost edge of the other side of the skull, and measure the maximum diameter line perpendicular to the midline to obtain the biparietal diameter value. The upper transverse section biparietal diameter measurement value: On the basis of the standard transverse section, the doctor moves the probe slightly upward by 7 mm to make the section closer to the fetal head direction. Adjust the angle and position of the probe so that the maximum diameter of the upper transverse section structure occupies more than 1 / 3 of the vertical diameter of the image (the target section occupies about 3 / 4 of the screen). On the selected upper transverse section, measure the biparietal diameter value, ensuring that the measurement value of the biparietal diameter on the upper transverse section is significantly different from that on the standard transverse section, but still within the measurable range.

[0012] The lower transverse section biparietal diameter measurement value: On the basis of the standard transverse section, the doctor moves the probe slightly downward by 7 mm to make the section closer to the fetal orbital direction. The moving distance should ensure that the biparietal diameter can still be clearly measured. Adjust the angle and position of the probe so that the maximum diameter of the lower transverse section structure occupies more than 1 / 3 of the vertical diameter of the image (the target section occupies about 3 / 4 of the screen). On the selected lower transverse section, measure the biparietal diameter value, ensuring that the measurement value of the biparietal diameter on the lower transverse section is significantly different from that on the standard transverse section, but still within the measurable range.

[0013] Specifically, verifying the collected data includes the following steps: Judge whether each piece of data in the collected data is complete according to the biparietal diameter data content. If any missing data is found, remind the doctor to supplement the data; use a data cleaning tool to deduplicate and remove abnormal data from the collected data, and at the same time verify the logical consistency of the data. Step S2, calculate the average value of the biparietal diameter measurement values of the standard cross-sections in the collected data; based on the biparietal diameter measurement values of the upper cross-section and the lower cross-section, preliminarily correct the average value of the biparietal diameter measurement values of the standard cross-section of the fetus to be corrected; specifically, the preliminary correction of the average value of the biparietal diameter measurement values of the standard cross-section of the fetus to be corrected based on the biparietal diameter measurement values of the upper cross-section and the lower cross-section includes the following steps: Calculate the average value of the biparietal diameter measurement values of the upper cross-section and the average value of the biparietal diameter measurement values of the lower cross-section in the collected data; The average deviation of the upper cross-section compared with the standard cross-section is expressed by the following formula: Formula (1); Where is the average deviation of the upper cross-section compared with the standard cross-section; is the average value of the biparietal diameter measurement values of the upper cross-section; B is the average value of the biparietal diameter measurement values of the standard cross-section of the collected data; The average deviation of the lower cross-section compared with the standard cross-section is expressed by the following formula: Formula (2); Where is the average deviation of the lower cross-section compared with the standard cross-section; is the average value of the biparietal diameter measurement values of the lower cross-section; B is the average value of the biparietal diameter measurement values of the standard cross-section of the collected data; The preliminary correction result is expressed by the following formula: Formula (3); Where is the preliminary correction result; B is the average value of the biparietal diameter measurement values of the standard cross-section of the collected data; is the average deviation of the upper cross-section compared with the standard cross-section; is the average deviation of the lower cross-section compared with the standard cross-section; and is a weight coefficient determined by linear regression analysis based on the gestational age. Step S3: Perform Bayesian posterior correction on the preliminary correction result based on the corresponding first biparietal diameter data in the historical database of the same gestational age; store it in the historical database. Each biparietal diameter data in the historical database includes: the average value of the standard cross-sectional biparietal diameter measurement, gestational age, preliminary correction result, and Bayesian posterior correction result. Specifically, performing Bayesian posterior correction on the preliminary correction result based on the corresponding first biparietal diameter data in the historical database of the same gestational age includes the following steps: Determine the prior mean and prior standard deviation corresponding to the current gestational age based on the average value of the standard cross-sectional biparietal diameter measurement of the same gestational age in the historical database; calculate the first measurement error standard deviation based on the average value of the standard cross-sectional biparietal diameter measurement in the historical database and the preliminary correction result in the historical database, and convert it to a logarithmic scale to make it closer to a normal distribution on the logarithmic scale; The overall mean of the logarithmic standard deviation is expressed by the following formula: Formula (4); where is the overall mean of the logarithmic standard deviation; n is the number of groups of gestational ages in the historical database; is the first measurement error standard deviation of the i-th group of gestational ages; The overall standard deviation of the logarithmic standard deviation is expressed by the following formula: Formula (5); where is the overall standard deviation of the logarithmic standard deviation; n is the number of groups of gestational ages in the historical database, is the first measurement error standard deviation of the i-th group of gestational ages; Randomly generate a logarithmic standard deviation sample value with a normal distribution for the collected data based on the overall mean of the logarithmic standard deviation and the overall standard deviation of the logarithmic standard deviation; Calculate the second measurement error standard deviation based on the generated logarithmic standard deviation sample value; Obtain the Bayesian posterior correction result based on the average value of the standard cross-sectional biparietal diameter measurement in the collected data, the preliminary correction result, the prior standard deviation, and the second measurement error standard deviation.

[0014] Specifically, the Bayesian posterior correction result is expressed by the following formula: Formula (6); where B is the average value of the standard cross-sectional biparietal diameter measurement of the collected data; is the preliminary correction result; is the prior standard deviation; is the second measurement error standard deviation; is the Bayesian posterior correction result.

[0015] Example 2 Collect multiple biparietal diameter data of the fetus to be corrected through ultrasonic examination in the pregnant woman's uterine cavity; verify the collected data; the gestational age of the fetus is 20 weeks; the biparietal diameter of the standard transverse section is about 4.1 - 5.2 cm; Calculate the average value B of the biparietal diameter measurement values of the standard transverse section in the collected data to be 4.5 cm; Calculate the average value of the biparietal diameter measurement values of the transverse section above the collected data to be 4.7 cm; Calculate the average value of the biparietal diameter measurement values of the transverse section below the collected data to be 4.3 cm; Calculate the average deviation of the upper transverse section compared with the standard transverse section through formula (1) = 4.7 - 4.5 = 0.2 cm; Calculate the average deviation of the lower transverse section compared with the standard transverse section through formula (2) = 4.3 - 4.5 = -0.2 cm; The weight coefficients determined by linear regression analysis at 20 gestational weeks, is 0.96, is 1.04; Calculate the preliminary correction result through formula (3) = ; According to the clinical research data, the prior mean u1 of the average biparietal diameter of the standard transverse section at 20 weeks of pregnancy is 4.5 cm, and the prior standard deviation is 0.2 cm. The measurement error distribution parameters are determined, and the overall mean of the calculated logarithmic standard deviation is -1.5, and the overall standard deviation is 0.3. Generate the second measurement error standard deviation to be 0.22 cm. Calculate the Bayesian posterior correction result through formula (6) to be 4.48 cm.

[0016] Example 3 Collect multiple biparietal diameter data of the fetus to be corrected through ultrasonic examination in the pregnant woman's uterine cavity; verify the collected data; the gestational age of the fetus is 28 weeks; the biparietal diameter of the standard transverse section is about 6.5 - 7.7 cm; Calculate the average value B of the biparietal diameter measurement values of the standard transverse section in the collected data to be 6.8 cm; Calculate the average value of the biparietal diameter measurement values of the transverse section above the collected data to be 7.0 cm; Calculate the average value of the biparietal diameter measurement values of the transverse section below the collected data to be 6.6 cm; Calculate the average deviation of the upper cross-section compared to the standard cross-section through formula (1). = 7.0 - 6.8 = 0.2 cm; Calculate the average deviation of the lower cross-section compared to the standard cross-section through formula (2). = 6.6 - 6.8 = -0.2 cm; The weight coefficients determined by linear regression analysis at 28 gestational weeks, are 0.98, and 1.02; Calculate the preliminary correction result through formula (3). = ; According to the clinical research data, the prior mean u1 of the average biparietal diameter of the standard cross-section at 28 weeks of pregnancy is 5.8 cm, and the prior standard deviation is 0.25 cm. With the measurement error distribution parameters determined, the overall mean of the calculated logarithmic standard deviation is -1.4, and the overall standard deviation is 0.35. Generate the second measurement error standard deviation which is 0.28 cm. Calculate the Bayesian posterior correction result through formula (6). is 6.796 cm.

[0017] Example 4 Based on the foregoing examples, this embodiment of the present application further provides a multi-parameter fusion correction system for ultrasonic examination of the pregnant woman's uterine cavity. Each module included in the system can be implemented by a processor in an electronic device; of course, it can also be implemented by specific logic circuits; during implementation, the processor can be a central processing unit (CPU), a micro processing unit (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA), etc.

[0018] Please refer to Figure 2 , Figure 2 which is a system block diagram of a multi-parameter fusion correction system for ultrasonic examination of the pregnant woman's uterine cavity. This embodiment provides a multi-parameter fusion correction system 200 for ultrasonic examination of the pregnant woman's uterine cavity, including: A data acquisition module 201, configured to collect multiple biparietal diameter data of the fetus to be corrected through ultrasonic examination of the pregnant woman's uterine cavity; verify the collected data; the biparietal diameter data includes: the measured value of the biparietal diameter of the standard cross-section, the measured value of the biparietal diameter of the upper cross-section, the measured value of the biparietal diameter of the lower cross-section, and the gestational week.

[0019] The preliminary calibration module 202 is configured to calculate the average value of the biparietal diameter measurement values of the standard cross-section in the acquired data; and preliminarily calibrate the average value of the biparietal diameter measurement values of the standard cross-section of the fetus to be calibrated based on the biparietal diameter measurement value of the upper cross-section and the biparietal diameter measurement value of the lower cross-section.

[0020] The Bayesian posterior calibration module 203 is configured to perform Bayesian posterior calibration on the preliminary calibration result based on the corresponding first biparietal diameter data in the historical database of the same gestational age; and store it in the historical database; each piece of biparietal diameter data in the historical database includes: the average value of the biparietal diameter measurement values of the standard cross-section, the gestational age, the preliminary calibration result, and the Bayesian posterior calibration result.

[0021] It should be noted here that: the description of the above system embodiments is similar to the description of the above method embodiments and has similar beneficial effects to the method embodiments. For the technical details not disclosed in the system embodiments of the present application, please refer to the description of the method embodiments of the present application for understanding.

[0022] It should be understood that the term "one embodiment" or "an embodiment" mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that in various embodiments of the present invention, the order numbers of the above processes do not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention. The serial numbers of the embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0023] It should be noted that in this article, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0024] In several embodiments provided by the present invention, it should be understood that the disclosed methods can be implemented in other ways. The methods disclosed in several method embodiments provided by the present invention can be arbitrarily combined without conflict to obtain new method embodiments. The features disclosed in several method embodiments provided by the present invention can be arbitrarily combined without conflict to obtain new method embodiments.

[0025] As mentioned above, it is only the implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the said claims.

Claims

1. A correction method for ultrasonic examination in the uterine cavity of pregnant women with multi-parameter fusion, characterized in that, Including: Collecting multiple biparietal diameter data of the fetus to be corrected through ultrasonic examination in the pregnant woman's uterine cavity; Verifying the collected data; The biparietal diameter data includes: the measured value of the biparietal diameter of the standard transverse section, the measured value of the biparietal diameter of the upper transverse section, the measured value of the biparietal diameter of the lower transverse section, gestational week; calculating the average value of the measured value of the biparietal diameter of the standard transverse section in the collected data; preliminarily correcting the average value of the measured value of the biparietal diameter of the standard transverse section of the fetus to be corrected based on the measured value of the biparietal diameter of the upper transverse section and the measured value of the biparietal diameter of the lower transverse section; performing Bayesian posterior correction on the preliminary correction result based on the corresponding first biparietal diameter data in the historical database of the same gestational week; storing it in the historical database; each biparietal diameter data in the historical database includes: the average value of the measured value of the biparietal diameter of the standard transverse section, gestational week, preliminary correction result, and Bayesian posterior correction result.

2. The method for correcting the ultrasonic examination in the uterine cavity of pregnant women with multi-parameter fusion according to claim 1, wherein, The verifying the collected data includes the following steps: judging whether each piece of data in the collected data is complete according to the content of the biparietal diameter data, and if a deficiency is found, reminding the doctor to supplement the data; using a data cleaning tool to de-duplicate and remove abnormal data from the collected data, and at the same time verifying the logical consistency of the data.

3. The multi-parameter fusion-based correction method for intrauterine ultrasound examination of pregnant women according to claim 2, wherein The preliminary correction of the average value of the standard transverse biparietal diameter measurement of the fetus to be corrected is based on the biparietal diameter measurement value of the upper transverse section and the biparietal diameter measurement value of the lower transverse section, and includes the following steps: calculating the average value of the biparietal diameter measurement value of the upper transverse section of the collected data and the average value of the biparietal diameter measurement value of the lower transverse section; the average deviation of the upper transverse section compared with the standard transverse section is expressed by the following formula: ; where, is the average deviation of the upper transverse section compared with the standard transverse section; is the average value of the biparietal diameter measurement value of the upper transverse section; B is the average value of the standard transverse biparietal diameter measurement value of the collected data; the average deviation of the lower transverse section compared with the standard transverse section is expressed by the following formula: ; where, is the average deviation of the lower transverse section compared with the standard transverse section; is the average value of the biparietal diameter measurement value of the lower transverse section; B is the average value of the standard transverse biparietal diameter measurement value of the collected data; the preliminary correction result is expressed by the following formula: ; where, is the preliminary correction result; B is the average value of the standard transverse biparietal diameter measurement value of the collected data; is the average deviation of the upper transverse section compared with the standard transverse section; is the average deviation of the lower transverse section compared with the standard transverse section; and are weight coefficients, which are determined by linear regression analysis based on gestational weeks.

4. The multi-parameter fusion-based correction method for ultrasonic examination of the pregnant woman's uterine cavity according to claim 3, wherein The performing Bayesian posterior correction on the preliminary correction result based on the corresponding first biparietal diameter data in the historical database of the same gestational week includes the following steps: determining the corresponding prior mean and prior standard deviation at the current gestational week based on the average value of the measured value of the biparietal diameter of the standard transverse section at the same gestational week in the historical database; calculating the first measurement error standard deviation based on the average value of the measured value of the biparietal diameter of the standard transverse section in the historical database and the preliminary correction result in the historical database, and converting it to a logarithmic scale to make it closer to a normal distribution on the logarithmic scale; The overall mean of the logarithmic standard deviation is expressed by the following formula: ； Among them, is the overall mean of the logarithmic standard deviation; n is the number of groups of gestational weeks in the historical database; is the standard deviation of the first measurement error for the i-th group of gestational weeks; The overall standard deviation of the logarithmic standard deviation is expressed by the following formula: ； Among them, is the overall standard deviation of the logarithmic standard deviation; n is the number of groups of gestational weeks in the historical database; is the standard deviation of the first measurement error of the i-th group of gestational weeks; a logarithmic standard deviation sample value is randomly generated from a normal distribution for the collected data based on the overall mean of the logarithmic standard deviation and the overall standard deviation of the logarithmic standard deviation; Calculating the second measurement error standard deviation based on the generated logarithmic standard deviation sample values; Obtaining the Bayesian posterior correction result based on the average value of the measured value of the biparietal diameter of the standard transverse section in the collected data, the preliminary correction result, the prior standard deviation, and the second measurement error standard deviation.

5. The multi-parameter fusion-based correction method for ultrasonic examination of the pregnant woman's uterine cavity according to claim 4, wherein, The Bayesian posterior correction result is expressed by the following formula: ; where B is the average value of the biparietal diameter measurement of the standard cross-section of the collected data; is the preliminary correction result; is the prior standard deviation; is the standard deviation of the second measurement error; is the Bayesian posterior correction result.

6. A correction system for ultrasonic examination of the pregnant woman's uterine cavity with multi-parameter fusion, characterized in that, Including: A data collection module for collecting multiple biparietal diameter data of the fetus to be corrected through ultrasonic examination in the pregnant woman's uterine cavity; Verifying the collected data; The biparietal diameter data includes: the measured value of the biparietal diameter of the standard transverse section, the measured value of the biparietal diameter of the upper transverse section, the measured value of the biparietal diameter of the lower transverse section, gestational week; a preliminary correction module for calculating the average value of the measured value of the biparietal diameter of the standard transverse section in the collected data; preliminarily correcting the average value of the measured value of the biparietal diameter of the standard transverse section of the fetus to be corrected based on the measured value of the biparietal diameter of the upper transverse section and the measured value of the biparietal diameter of the lower transverse section; a Bayesian posterior correction module for performing Bayesian posterior correction on the preliminary correction result based on the corresponding first biparietal diameter data in the historical database of the same gestational week; storing it in the historical database; each biparietal diameter data in the historical database includes: the average value of the measured value of the biparietal diameter of the standard transverse section, gestational week, preliminary correction result, and Bayesian posterior correction result.

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