Ultrasound image-based parameter measurement method, device, and readable storage medium

Abstract

The application relates to the technical field of ultrasonic images, and discloses a parameter measurement method and device based on an ultrasonic image and a readable storage medium. The method comprises the following steps: acquiring an ultrasonic image; wherein the ultrasonic image is collected when a positioning piece is arranged on the skin surface of a pubic symphysis of a measured human body; determining a pubic symphysis contour and a fetal head contour according to the ultrasonic image; wherein the pubic symphysis contour is replaced by the positioning piece; determining a detection parameter according to the pubic symphysis contour and the fetal head contour, and displaying the ultrasonic image and the detection parameter; wherein the detection parameter comprises at least two of a fetal head progress angle, a distance between the pubic symphysis and the fetal head, a fetal head progress distance and a distance between the fetal head and the perineum. Through the above method, the requirement for the image quality of the ultrasonic image is reduced, the medical staff or the ultrasonic system does not need to pay too much attention to whether the reference tissue features in the ultrasonic image are clear and complete and whether the reference tissue features are easy to identify and extract, and therefore the extraction efficiency of the detection parameter is improved.

Description

Technical Field

[0001] This application relates to the field of ultrasound imaging technology, and in particular to a method, apparatus and readable storage medium for parameter measurement based on ultrasound images. Background Technology

[0002] During childbirth, the progress of labor needs to be monitored and the delivery method clinically assessed before the pregnant woman enters the delivery room and during labor. Traditional monitoring methods involve internal examination to check the degree of cervical dilation, the position of the presenting head, and the fetal position. This process relies on the midwife's experience and judgment, which is highly subjective. Furthermore, frequent digital examinations can increase the risk of infection and discomfort for the pregnant woman, and reduce her compliance. Summary of the Invention

[0003] The main technical problem addressed by this application is to provide a parameter measurement method, device, and readable storage medium based on ultrasound images. This method can utilize a positioning element to replace the pubic symphysis contour, making the positioning element easily identifiable in ultrasound images. This reduces the image quality requirements of ultrasound images and allows medical personnel or ultrasound systems to focus less on whether the reference tissue features in the ultrasound images are clear, complete, and easy to identify and extract, thereby improving the efficiency of parameter extraction.

[0004] To address the aforementioned problems, this application provides a technical solution for parameter measurement based on ultrasound images. The method includes: acquiring an ultrasound image; wherein the ultrasound image is acquired when a positioning element is placed on the skin surface of the pubic symphysis of the tested human body; determining the contour of the pubic symphysis and the fetal head contour based on the ultrasound image; wherein the pubic symphysis contour is replaced by the positioning element; determining detection parameters based on the pubic symphysis contour and the fetal head contour, and displaying the ultrasound image and the detection parameters; wherein the detection parameters include at least two of the following: fetal head progression angle, distance between the pubic symphysis and the fetal head, fetal head progression distance, and distance between the fetal head and the perineum.

[0005] The positioning element includes a first positioning element and a second positioning element; the first positioning element is positioned at the upper end of the skin of the pubic symphysis, and the second positioning element is positioned at the lower end of the skin of the pubic symphysis.

[0006] The process of determining the pubic symphysis contour and fetal head contour based on ultrasound images includes: determining a first positioning element and a second positioning element, as well as the fetal head region, in the ultrasound image; determining the first positioning element and the second positioning element as the pubic symphysis contour; extracting feature points from the fetal head region to obtain fetal head feature points; and fitting the fetal head feature points to obtain the fetal head contour.

[0007] The method further includes inputting ultrasound images into a trained segmentation model for segmentation processing to obtain the fetal head region.

[0008] The detection parameters are determined based on the pubic symphysis contour and the fetal head contour, including: determining the center points of the first and second positioning elements in the ultrasound image; connecting the center points of the first and second positioning elements to obtain a first straight line; drawing a tangent to the fetal head contour towards the perineum based on the center point of the second positioning element to obtain a second straight line; and using the angle between the first and second straight lines as the fetal head progression angle.

[0009] The determination of detection parameters based on the pubic symphysis contour and the fetal head contour includes: determining the center points of the first and second positioning elements in the ultrasound image; drawing a first straight line by connecting the center points of the first and second positioning elements; drawing a third straight line perpendicular to the first straight line based on the center point of the second positioning element; drawing a fourth straight line parallel to the third straight line on the side facing the perineum, with the fourth straight line being tangent to the fetal head contour; and taking the distance between the third and fourth straight lines as the fetal head progression distance.

[0010] The determination of detection parameters based on the pubic symphysis contour and the fetal head contour includes: determining the center points of the first and second positioning elements in the ultrasound image; drawing a first straight line by connecting the center points of the first and second positioning elements; drawing a fifth straight line perpendicular to the first straight line based on the center point of the second positioning element; and if the fifth straight line intersects the fetal head contour at a first target point, then the distance between the center point of the second positioning element and the first target point is taken as the distance between the pubic symphysis and the fetal head.

[0011] The determination of detection parameters based on the pubic symphysis contour and the fetal head contour includes: determining the center points of the first and second positioning elements in the ultrasound image; drawing a line connecting the center points of the first and second positioning elements to obtain a first straight line; determining the longest axis in the fetal head contour; drawing a sixth straight line parallel to the first straight line on the side facing the fetal head contour, with the sixth straight line intersecting the longest axis; and taking the angle between the sixth straight line and the longest axis as the fetal head direction angle.

[0012] The process of determining the pubic symphysis contour and fetal head contour based on ultrasound images includes: determining the contour of the positioning device and the fetal head region in the ultrasound image; determining the contour of the positioning device as the pubic symphysis contour; extracting feature points from the fetal head region to obtain fetal head feature points; and fitting the fetal head feature points to obtain the fetal head contour.

[0013] The positioning element is made of at least one acoustically reflective material.

[0014] The sound-reflecting material is metal.

[0015] The size of the positioning component should not exceed the projected size of the pubic symphysis.

[0016] To address the aforementioned issues, another technical solution adopted in this application is to provide an ultrasound imaging device, comprising: an ultrasound probe for emitting ultrasound signals to a target tissue and acquiring ultrasound echo signals reflected by the target tissue; a memory for storing a computer program; and a processor connected to the ultrasound probe and the memory, for executing the computer program based on the ultrasound echo signals to implement the method provided by the above technical solution.

[0017] To address the aforementioned problems, another technical solution adopted in this application is to provide a computer-readable storage medium for storing a computer program, which, when executed by a processor, implements the method provided by the above technical solution.

[0018] The beneficial effects of this application are as follows: Unlike existing technologies, this application provides a parameter measurement method based on ultrasound images. This method includes: acquiring an ultrasound image; wherein the ultrasound image is acquired when a positioning element is placed on the skin surface of the pubic symphysis of the tested human body; determining the contour of the pubic symphysis and the fetal head contour based on the ultrasound image; wherein the pubic symphysis contour is replaced by the positioning element; determining detection parameters based on the pubic symphysis contour and the fetal head contour, and displaying the ultrasound image and the detection parameters; wherein the detection parameters include at least two of the following: fetal head progression angle, distance between the pubic symphysis and the fetal head, fetal head progression distance, and distance between the fetal head and the perineum. By using a positioning element to replace the pubic symphysis contour, the positioning element can be easily identified in the ultrasound image, reducing the image quality requirements of the ultrasound image. This allows medical personnel or the ultrasound system to focus less on whether the reference tissue features in the ultrasound image are clear, complete, and easily identifiable, thereby improving the efficiency of parameter extraction. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating an embodiment of the parameter measurement method based on ultrasound images provided in this application;

[0020] Figure 2 This is a schematic diagram of the structure of an embodiment of the ultrasound imaging device provided in this application;

[0021] Figure 3 This is a schematic flowchart of another embodiment of the parameter measurement method based on ultrasound images provided in this application;

[0022] Figure 4 This is a flowchart illustrating an embodiment of determining the fetal head progression angle provided in this application;

[0023] Figure 5 This is a flowchart illustrating an embodiment of determining the distance of fetal head progression provided in this application;

[0024] Figure 6 This is a flowchart illustrating an embodiment of determining the distance between the pubic symphysis and the fetal head provided in this application;

[0025] Figure 7 This is a flowchart illustrating an embodiment of determining the tire head orientation angle provided in this application;

[0026] Figure 8 This is a schematic diagram of the positioning element provided in this application;

[0027] Figure 9 This is a schematic diagram of ultrasound image acquisition provided in this application;

[0028] Figure 10 This application provides based on Figure 8 A schematic diagram of the acquired ultrasound images;

[0029] Figure 11 This is a schematic diagram of an embodiment of the fetal head progression angle provided in this application;

[0030] Figure 12 This is a schematic diagram of an embodiment of the fetal head progression distance provided in this application;

[0031] Figure 13 This is a schematic diagram of an embodiment of the head-pubic symphysis distance provided in this application;

[0032] Figure 14 This is a schematic diagram of an embodiment of the tire head orientation provided in this application;

[0033] Figure 15 This is a schematic flowchart of another embodiment of the parameter measurement method based on ultrasound images provided in this application;

[0034] Figure 16 This is a schematic diagram of the structure of an embodiment of the ultrasound imaging device provided in this application;

[0035] Figure 17 This is a schematic diagram of an embodiment of the computer-readable storage medium provided in this application. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, not all structures. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] See Figure 1 , Figure 1 This is a schematic flowchart of an embodiment of the parameter measurement method based on ultrasound images provided in this application. The method includes:

[0040] Step 11: Acquire ultrasound images; wherein, the ultrasound images are acquired when a positioning device is placed on the skin surface of the pubic symphysis of the human body being tested.

[0041] In this embodiment, an ultrasound imaging device can be used to acquire ultrasound images. See also... Figure 2 The ultrasound imaging device 100 includes an ultrasound probe 101, a transmitting circuit 102, a receiving circuit 103, a transmit / receive selection switch 104, a processor 105, a display 106, and a memory 107. The transmitting circuit 102 and the receiving circuit 103 can be connected to the ultrasound probe 101 via the transmit / receive selection switch 104. In some embodiments, the transmitting circuit 102, the receiving circuit 103, and the transmit / receive selection switch 104 can be integrated with the ultrasound probe 101.

[0042] During ultrasound imaging, the transmitting circuit 102 sends a delayed-focused transmission pulse with a certain amplitude and polarity to the ultrasound probe 101 via the transmit / receive selection switch 104 to excite the ultrasound probe 101 to emit ultrasonic waves. After a certain delay, the receiving circuit 103 receives the echo of the ultrasonic wave via the transmit / receive selection switch 104, obtains the ultrasonic echo signal, and performs amplification, analog-to-digital conversion, and beamforming on the echo signal. Then, the processed ultrasonic echo signal is sent to the processor 105 for further processing. The processor 105 processes the ultrasonic echo signal to obtain the corresponding ultrasound image.

[0043] The display 106 is connected to the processor 105. For example, the processor 105 can be connected to the display 106 via an external input / output port. The display 106 can detect user input information, which may include, for example, control commands for ultrasonic wave transmission and reception timing, operation input commands for initiating still image capture, dynamic video capture, and / or dynamic image storage, or other command types. The display 106 may include one or more of the following: keyboard, mouse, scroll wheel, trackball, mobile input device (such as a mobile device with a touch screen, a mobile phone, etc.), multi-function knob, buttons, etc. Therefore, the corresponding external input / output port can be a wireless communication module, a wired communication module, or a combination of both. The external input / output port can also be implemented based on USB, bus protocols such as CAN, and / or wired network protocols.

[0044] The display 106 also includes a screen that can display ultrasound images acquired by the processor 105. Furthermore, while displaying ultrasound images, the screen can also provide a graphical user interface for human-computer interaction. One or more controlled objects can be set on the graphical interface, allowing the user to input operation commands through the display 106 to control these controlled objects and perform corresponding control operations. For example, icons can be displayed on the graphical interface, and the user can operate these icons using a human-computer interaction device to perform specific functions, such as the function of storing dynamic images while simultaneously capturing still images / movie clips. In practical applications, the screen can be a touchscreen display. Furthermore, the display in this embodiment may include one screen or multiple screens.

[0045] In other embodiments of this application, the processor 105 is also configured to receive an instruction to store the ultrasound image, and in response to the instruction to store a dynamic image, a static image, or a short video of the ultrasound image, thereby facilitating a user (e.g., a doctor) to browse and review it for diagnosis.

[0046] For example, the ultrasound imaging device 100 can be of the amplitude modulation type, the spot scanning type, or the grayscale modulation type.

[0047] In this embodiment, the ultrasound imaging device 100 is used during the delivery process of a pregnant woman. A positioning device is set on the skin surface of the pregnant woman's pubic symphysis to collect ultrasound images during the delivery process, so as to assist medical staff in assisting the pregnant woman with childbirth.

[0048] In some embodiments, the positioning element may be a single piece, made at least of an acoustically reflective material. The acoustically reflective material may be a strong acoustically reflective material, or it may be a metal.

[0049] In some embodiments, there may be multiple positioning elements, such as two, three, or four.

[0050] When there are two positioning elements, one positioning element is set at the upper end of the skin corresponding to the pubic symphysis, and the other positioning element is set at the lower end of the skin corresponding to the pubic symphysis.

[0051] When there are three positioning devices, one positioning device is set at the upper end of the skin corresponding to the pubic symphysis, one positioning device is set at the lower end of the skin corresponding to the pubic symphysis, and one positioning device is set at the middle part of the skin corresponding to the pubic symphysis.

[0052] Step 12: Determine the pubic symphysis contour and fetal head contour based on the ultrasound images; the pubic symphysis contour is replaced by a positioning element.

[0053] In this embodiment, the ultrasound device is used during the delivery process to assist medical staff in assisting the pregnant woman with childbirth. Step 11 involves acquiring ultrasound images by placing either a three-dimensional or two-dimensional ultrasound probe at the pregnant woman's perineum to obtain intrapartum ultrasound images. The intrapartum ultrasound image data acquired by the three-dimensional ultrasound probe includes at least one volumetric three-dimensional image, while the ultrasound image data acquired by the two-dimensional ultrasound probe is a segment of intrapartum ultrasound video.

[0054] Therefore, these intrapartum ultrasound images contain the outline of the pubic symphysis and the outline of the fetal head. The outline of the pubic symphysis and the outline of the fetal head can then be identified from the ultrasound images to determine their position within the images.

[0055] In step 12, the trained network model can be used to identify the ultrasound image to determine the fetal head contour and mark the fetal head contour on the image.

[0056] Step 13: Determine the detection parameters based on the pubic symphysis contour and the fetal head contour, and display the ultrasound image and detection parameters; wherein, the detection parameters include at least two of the following: fetal head progression angle, distance between the pubic symphysis and the fetal head, fetal head progression distance, and distance between the fetal head and the perineum.

[0057] In step 13, after determining the outline of the pubic symphysis and the fetal head, the ultrasound images are classified into longitudinal section images and transverse section images.

[0058] The angle of progression (AOP), head-Symphysis distance (HSD), and progress distance (PD) can be calculated using longitudinal section images and the defined pubic symphysis and fetal head contours. The head-perineum distance (HPD) can be calculated using transverse section images and the defined pubic symphysis and fetal head contours.

[0059] AOP is the angle between the line along the long axis of the pubic symphysis and the tangent at the lower edge of the pubic symphysis and the furthest point of the fetal skull.

[0060] HSD (Head-Side Distance) is the distance between the lowest edge of the pubic symphysis and the fetal skull, and is an indicator of fetal head descent. It is mainly used for fetuses in the occiput anterior position. As the fetal head descends towards the pelvic floor, the HSD gradually shortens.

[0061] HPD is the shortest distance between the outer edge of the fetal skull and the perineum.

[0062] For example, it can display cross-sectional images, longitudinal images, and detection parameters; where each detection parameter is labeled at the corresponding position in the cross-sectional or longitudinal image.

[0063] In this way, the complete test parameters can be obtained, so that medical staff can assist pregnant women in delivery based on the test parameters.

[0064] In other embodiments, the detection parameters also include the head orientation angle and the head position.

[0065] In this embodiment, an ultrasound image is acquired; wherein the ultrasound image is acquired when a positioning element is placed on the skin surface of the pubic symphysis of the tested human body; the contour of the pubic symphysis and the contour of the fetal head are determined based on the ultrasound image; wherein the contour of the pubic symphysis is replaced by the positioning element; detection parameters are determined based on the contour of the pubic symphysis and the contour of the fetal head, and the ultrasound image and detection parameters are displayed; wherein the detection parameters include at least two of the following: fetal head progression angle, distance between the pubic symphysis and the fetal head, fetal head progression distance, and distance between the fetal head and the perineum. By using the positioning element to replace the contour of the pubic symphysis, the positioning element can be easily identified in the ultrasound image, reducing the image quality requirements of the ultrasound image. This allows medical personnel or the ultrasound system to focus less on whether the reference tissue features in the ultrasound image are clear, complete, and easy to identify and extract, thereby improving the extraction efficiency of detection parameters.

[0066] See Figure 3 , Figure 3 This is a schematic flowchart of another embodiment of the parameter measurement method based on ultrasound images provided in this application. The method includes:

[0067] Step 31: Acquire ultrasound images; wherein, the ultrasound images are acquired when a positioning device is placed on the skin surface of the pubic symphysis of the human body being tested.

[0068] The first positioning element is positioned at the upper end of the skin of the pubic symphysis, and the second positioning element is positioned at the lower end of the skin of the pubic symphysis.

[0069] Step 32: Identify the first and second positioning elements and the fetal head region in the ultrasound image.

[0070] The ultrasound image is input into a trained segmentation model for segmentation processing to obtain the fetal head region.

[0071] Step 33: Determine the first and second positioning elements as the pubic symphysis contour, and extract feature points from the fetal head region to obtain fetal head feature points.

[0072] Step 34: Fit the feature points of the fetal head to obtain the fetal head contour.

[0073] In this section, the pubic symphysis contour is replaced by a positioning element.

[0074] Step 35: Determine the detection parameters based on the pubic symphysis contour and the fetal head contour; wherein, the detection parameters include at least two of the following: fetal head progression angle, distance between the pubic symphysis and the fetal head, fetal head progression distance, and distance between the fetal head and the perineum.

[0075] See Figure 4 The following methods can be used to determine the angle of fetal head progression:

[0076] Step 41: Determine the center points of the first and second positioning elements in the ultrasound image.

[0077] Step 42: Connect the center points of the first positioning element and the second positioning element to obtain the first straight line.

[0078] Step 43: Based on the center point of the second positioning element, draw a tangent to the tire head contour facing the perineum to obtain the second straight line.

[0079] Step 44: Take the angle between the first straight line and the second straight line as the tire head progression angle.

[0080] In some embodiments, see Figure 5 The following methods can be used to determine the distance of fetal head progression:

[0081] Step 51: Determine the center points of the first and second positioning elements in the ultrasound image.

[0082] Step 52: Connect the center points of the first positioning element and the second positioning element to obtain the first straight line.

[0083] Step 53: Based on the center point of the second positioning element, draw a third straight line perpendicular to the first straight line.

[0084] Step 54: Draw a fourth line parallel to the third line on the side facing the perineum, and make the fourth line tangent to the outline of the fetal head.

[0085] Step 55: Take the distance between the third and fourth lines as the distance the tire head has progressed.

[0086] In some embodiments, see Figure 6 The distance between the pubic symphysis and the fetal head can be determined in the following ways:

[0087] Step 61: Determine the center points of the first and second positioning elements in the ultrasound image.

[0088] Step 62: Connect the center points of the first positioning element and the second positioning element to obtain the first straight line.

[0089] Step 63: Based on the center point of the second positioning element, draw a fifth line perpendicular to the first line.

[0090] Step 64: If the fifth straight line intersects the fetal head contour at the first target point, then the distance between the center point of the second positioning element and the first target point is taken as the distance between the pubic symphysis and the fetal head.

[0091] In some embodiments, see Figure 7 The following methods can be used to determine the tire head orientation angle:

[0092] Step 71: Determine the center points of the first and second positioning elements in the ultrasound image.

[0093] Step 72: Connect the center points of the first positioning element and the second positioning element to obtain the first straight line.

[0094] Step 73: Determine the longest axis in the tire head profile.

[0095] Step 74: Draw a sixth line parallel to the first line on the side facing the tire head contour, and the sixth line intersects the longest axis.

[0096] Step 75: Take the angle between the sixth straight line and the longest axis as the tire head direction angle.

[0097] In this embodiment, by using the above method, the positioning element is replaced with the pubic symphysis contour, making the positioning element easy to identify in the ultrasound image, reducing the image quality requirements of the ultrasound image, and allowing medical staff or the ultrasound system to not have to pay too much attention to whether the reference tissue features in the ultrasound image are clear and complete, or whether they are easy to identify and extract, thereby improving the extraction efficiency of detection parameters.

[0098] In one application scenario, combined Figures 8-14 Explanation:

[0099] Let's take the pubic symphysis as an example. The pubic symphysis is a necessary fixed feature for calculating many labor parameters, such as fetal head development angle, fetal head direction, development distance, and head-pubic symphysis distance. However, in actual ultrasound images, its feature boundaries are not obvious or clear, which brings difficulties and errors to feature identification and extraction, as well as accurate parameter measurement. By using the aforementioned positioning element to replace the pubic symphysis, the artificial marker feature design provides more stable and clearer features in ultrasound images. The following technical process is adopted, that is, using the positioning element as an artificial marker feature to replace human biological tissue features to achieve the measurement of labor parameters, as detailed below:

[0100] Step 1: Set up the positioning device and acquire ultrasound images based on the positioning device.

[0101] First, the target tissue feature is selected and located. Since the pubic symphysis is a very important human tissue feature, it serves as a fixed reference feature for obtaining many parameters. Using the pubic symphysis as the target tissue feature, clinicians can easily locate the pubic symphysis and its superior and inferior endpoints by palpation based on experience.

[0102] Then, the positioning element is placed on the skin surface corresponding to the pubic symphysis. For example, two small, highly reflective patches are attached to the epidermis of the mother bone at the upper and lower ends of the pubic symphysis in the vertical direction, serving as positioning elements to replace the pubic symphysis as a fixed reference feature. Figure 8 As shown, these are high-intensity sound reflector patch 1 and high-intensity sound reflector patch 2, respectively.

[0103] Then, ultrasound images are acquired. Using an ultrasound probe, such as a large convex / 3D probe, scanning is performed above the pubic symphysis, as shown... Figure 9 As shown, the image it captures exhibits two distinct image features, such as... Figure 10 Regions 1 and 2, where the medium gray intensity is significantly attenuated, are characterized by strong sound reflective patches 1 and 2.

[0104] The patch material can be a material that strongly reflects sound. Specifically, it can be a pure metal sheet, a sheet with a uniformly coated metal material, etc. Regarding the shape of the patch: the shape can be set arbitrarily according to actual needs, but there cannot be any empty areas in the patch, such as circles, rectangles, and triangles.

[0105] Size requirements for the patch: 1. The thickness should be appropriate, ensuring good contact between the ultrasound probe and the skin even after the patch is placed between them, or a liquid coupling material can be applied between them. 2. The contact area between the patch and the skin should not be too large, otherwise it will affect image quality and cause significant acoustic shadowing. For example, when the patch is circular, its radius can be 2 mm or 2.5 mm. When the patch is rectangular, its length can be 10 mm and its width 1 mm, or its length can be 5 mm and its width 5 mm, or its length can be 4 mm and its width 4 mm, etc.

[0106] Step 2: Receive the ultrasonic echo returned by the ultrasonic wave emitted by the positioning device and extract the feature information.

[0107] Specifically, it includes:

[0108] The ultrasound images are processed to extract feature information. Specifically, the ultrasound images undergo preprocessing, such as image filtering, smoothing, and morphological processing. Feature extraction is then performed on the preprocessed ultrasound images, such as segmenting two gray-scale intensity attenuation regions and extracting two starting points near the ultrasound probe within these regions; these starting points are the positions of patch 1 and patch 2. Additionally, AI algorithms / conventional image processing algorithms are used to segment the edge of the fetal head in the ultrasound image, and ellipse fitting is performed to fit the fetal head contour.

[0109] Step 3: Calculate parameters based on the extracted feature information.

[0110] Specifically, by utilizing the extracted feature information and combining it with the definitions of each parameter, labor progress parameters are calculated, such as the angle of progression, the direction of the fetal head, the distance of progression, the distance between the head and the pubic symphysis, and other labor parameters.

[0111] The following example uses four delivery parameters—fetal head progression angle, progression distance, head-pubic symphysis distance, and fetal head direction—to illustrate the general method of modeling and parameter calculation based on positioning elements in ultrasound images.

[0112] like Figure 11 The diagram illustrates the calculation of the Angle of Progression (AOP) parameter according to the above procedure. Traditionally, the AOP represents the angle between the long axis of the pubic symphysis and the tangent line to the fetal head drawn from the lower end of the pubic symphysis; as shown... Figure 11 In this application scenario, two patch points can be used to replace the upper and lower endpoints of the pubic symphysis to calculate the progression angle, which is represented by AOP'. Figure 11 In the diagram, A and B are the upper and lower endpoints of the pubic symphysis, and strong sound-reflecting patches 1 and 2 are attached to the maternal skin perpendicularly above these two endpoints. Then, AOP' represents the angle between the line connecting patches 1 and 2 and the tangent to the fetal head drawn from patch 2.

[0113] like Figure 12 The diagram illustrates the calculation of the fetal head progression distance (PD) according to the above procedure. Traditionally, the progression distance (PD) represents the minimum distance between the subpubic line (passing through the lower end of the pubic symphysis and perpendicular to its long axis) and the tangent to the fetal head. Figure 12 The distance between l3 and l4. In this application scenario, the two patch points can be used to replace the upper and lower endpoints of the pubic symphysis to calculate the progression distance, denoted by PD'. Figure 12 In the diagram, A and B are the upper and lower endpoints of the pubic symphysis, respectively. Strong acoustic reflection patches 1 and 2 are attached to the maternal skin perpendicularly above these two endpoints. PD' represents the distance between line l1 passing through patch 2 and perpendicular to the line connecting patch 1 and patch 2, and the tangent line l2 to the fetal head.

[0114] like Figure 13 The diagram illustrates the calculation of the head-symphysis distance (HSD) according to the above procedure. Traditionally, the progression distance (HSD) is represented as the distance between the intersection of the inferior pubic line (passing through the lower end of the pubic symphysis and perpendicular to its long axis) and the fetal head, and the lower end of the pubic symphysis. Figure 13 The length of line l6. In this application scenario, the head-mark distance can be calculated by using two patch points to replace the upper and lower endpoints of the pubic symphysis, denoted by HMD (head-mark distance). Figure 13 In the diagram, A and B are the upper and lower endpoints of the pubic symphysis. Strong acoustic reflection patches 1 and 2 are attached to the maternal skin above HMD'. HMD' represents the distance between the line passing through patch 2 and perpendicular to the line connecting patch 1 and patch 2, and the fetal head; that is, the length of line l5.

[0115] like Figure 14 The diagram illustrates the calculation of fetal head orientation according to the above procedure. One traditional method for describing fetal head orientation is the angle between the longest axis of the identifiable fetal head and the long axis of the pubic symphysis in the image; such as... Figure 14 The midpoint θ angle. In this application scenario, the two patch points can be used to replace the upper and lower endpoints of the pubic symphysis to calculate the fetal head direction. For example... Figure 14 In the image, A and B are the upper and lower endpoints of the pubic symphysis, respectively. High-intensity acoustic reflection patches 1 and 2 are attached to the maternal skin perpendicularly above these endpoints. The fetal head direction is defined as the angle α between the longest axis of the identifiable fetal head in the image and the line connecting patches 1 and 2. Specifically, the longest axis l7 of the fetal head is calculated, and a line l9 parallel to the line connecting patches 1 and 2 is drawn, such that l7 and l9 intersect. The angle between l7 and l9 is the fetal head direction.

[0116] By using the above method to replace the pubic symphysis contour with a positioning element, the positioning element can be easily identified in ultrasound images, reducing the image quality requirements of ultrasound images. This allows medical staff or ultrasound systems to focus less on whether the reference tissue features in the ultrasound images are clear, complete, and easy to identify and extract, thereby improving the extraction efficiency of detection parameters.

[0117] See Figure 15 , Figure 15 This is a schematic flowchart of another embodiment of the parameter measurement method based on ultrasound images provided in this application. The method includes:

[0118] Step 151: Acquire ultrasound images; wherein, the ultrasound images are acquired when a positioning device is placed on the skin surface of the pubic symphysis of the human body being tested.

[0119] Step 152: Determine the outline of the positioning element and the fetal head region in the ultrasound image.

[0120] In some embodiments, the positioning element is a single element positioned at the upper to lower ends of the skin corresponding to the pubic symphysis. The outline of the positioning element will be visible in the ultrasound image. Because the projection of the pubic symphysis tends to be elongated, the size of the positioning element also tends to be rectangular.

[0121] Optionally, the size of the positioning element is no larger than the projected size of the pubic symphysis.

[0122] Step 153: Determine the contour of the positioning component as the pubic symphysis contour, and extract feature points from the fetal head region to obtain fetal head feature points.

[0123] Step 154: Fit the fetal head feature points to obtain the fetal head contour; wherein, the pubic symphysis contour is replaced by a positioning element.

[0124] Steps 153-154 have the same or similar technical solutions as any of the above embodiments, and will not be described in detail here.

[0125] Step 155: Determine the detection parameters based on the pubic symphysis contour and the fetal head contour, and display the ultrasound image and detection parameters; wherein, the detection parameters include at least two of the following: fetal head progression angle, distance between the pubic symphysis and the fetal head, fetal head progression distance, and distance between the fetal head and the perineum.

[0126] In step 155, since the positioning element tends to be elongated, the two short sides are used as the two sides of the central axis of the pubic symphysis contour. At this time, the line connecting the two short sides can be used as the basis for subsequent calculation of detection parameters.

[0127] For specific details, please refer to the calculation method in any of the above embodiments, which will not be repeated here.

[0128] See Figure 16, Figure 16 This is a schematic diagram of an embodiment of the ultrasound imaging device provided in this application. The ultrasound imaging device 100 includes: an ultrasound probe 101, a processor 105, and a memory 107.

[0129] The ultrasonic probe 101 is used to emit ultrasonic signals to the target tissue and collect the ultrasonic echo signals reflected by the target tissue; the memory 107 is used to store computer programs; the processor 105 is connected to the ultrasonic probe 101 and the memory 107 respectively, and is used to execute the computer program based on the ultrasonic echo signals to implement the following method:

[0130] Acquire ultrasound images; wherein the ultrasound images are acquired when a positioning device is placed on the skin surface of the pubic symphysis of the human body being tested; determine the contour of the pubic symphysis and the contour of the fetal head based on the ultrasound images; wherein the contour of the pubic symphysis is replaced by the positioning device; determine detection parameters based on the contour of the pubic symphysis and the contour of the fetal head, and display the ultrasound images and detection parameters; wherein the detection parameters include at least two of the following: fetal head progression angle, distance between the pubic symphysis and the fetal head, fetal head progression distance, and distance between the fetal head and the perineum.

[0131] It is understood that the processor 105 is also used to execute computer programs to implement the methods of any of the above embodiments, as detailed in any of the above embodiments, which will not be repeated here.

[0132] See Figure 17 , Figure 17 This is a schematic diagram of an embodiment of the computer-readable storage medium provided in this application. The computer-readable storage medium 170 is used to store a computer program 171, which, when executed by a processor, implements the following method:

[0133] Acquire ultrasound images; wherein the ultrasound images are acquired when a positioning device is placed on the skin surface of the pubic symphysis of the human body being tested; determine the contour of the pubic symphysis and the contour of the fetal head based on the ultrasound images; wherein the contour of the pubic symphysis is replaced by the positioning device; determine detection parameters based on the contour of the pubic symphysis and the contour of the fetal head, and display the ultrasound images and detection parameters; wherein the detection parameters include at least two of the following: fetal head progression angle, distance between the pubic symphysis and the fetal head, fetal head progression distance, and distance between the fetal head and the perineum.

[0134] It is understood that when computer program 171 is executed by the processor, it is also used to implement the method of any of the above embodiments. For details, please refer to any of the above embodiments, which will not be repeated here.

[0135] In the several embodiments provided in this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0136] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0137] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0138] If the integrated units in the other embodiments described above are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0139] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A parameter measurement method based on ultrasound images, characterized in that, The method includes: Acquiring ultrasound images; wherein the ultrasound images are acquired when a positioning element is provided on the skin surface of the pubic symphysis of the human body being tested; wherein the positioning element is made of at least a metallic acoustic reflective material; The contours of the pubic symphysis and the fetal head are determined based on the ultrasound image; wherein, determining the contours of the pubic symphysis based on the ultrasound image includes: segmenting the gray intensity attenuation region in the ultrasound image caused by the metallic acoustic reflective material, and extracting the starting point in the region near the ultrasound probe as the position of the positioning element, so that the contours of the pubic symphysis are replaced by the position of the positioning element. The detection parameters are determined based on the pubic symphysis contour and the fetal head contour, and the ultrasound image and the detection parameters are displayed; wherein, the detection parameters include at least two of the following: fetal head progression angle, distance between the pubic symphysis and the fetal head, fetal head progression distance, and distance between the fetal head and the perineum.

2. The method according to claim 1, characterized in that, The positioning element includes a first positioning element and a second positioning element; The first positioning element is positioned at the upper end of the skin of the pubic symphysis, and the second positioning element is positioned at the lower end of the skin of the pubic symphysis.

3. The method according to claim 2, characterized in that, Determining the pubic symphysis contour and fetal head contour based on the ultrasound image includes: The first positioning element, the second positioning element, and the fetal head region are identified in the ultrasound image; The first positioning element and the second positioning element are defined as the pubic symphysis contour, and feature points are extracted from the fetal head region to obtain fetal head feature points; The fetal head feature points are fitted to obtain the fetal head contour.

4. The method according to claim 3, characterized in that, The method further includes: The ultrasound image is input into a trained segmentation model for segmentation processing to obtain the fetal head region.

5. The method according to claim 3, characterized in that, The determination of detection parameters based on the pubic symphysis contour and the fetal head contour includes: Determine the center points of the first and second positioning elements in the ultrasound image; A first straight line is obtained by connecting the center points of the first positioning element and the second positioning element. Based on the center point of the second positioning element, draw a tangent to the fetal head contour toward the perineum to obtain a second straight line; The angle between the first straight line and the second straight line is taken as the tire head progression angle.

6. The method according to claim 3, characterized in that, The determination of detection parameters based on the pubic symphysis contour and the fetal head contour includes: Determine the center points of the first and second positioning elements in the ultrasound image; A first straight line is obtained by connecting the center points of the first positioning element and the second positioning element. Based on the center point of the second positioning element, draw a third straight line perpendicular to the first straight line; Draw a fourth line parallel to the third line on the side facing the perineum, and the fourth line is tangent to the outline of the fetal head; The distance between the third straight line and the fourth straight line is taken as the distance of the fetal head progression.

7. The method according to claim 3, characterized in that, The determination of detection parameters based on the pubic symphysis contour and the fetal head contour includes: Determine the center points of the first and second positioning elements in the ultrasound image; A first straight line is obtained by connecting the center points of the first positioning element and the second positioning element. Based on the center point of the second positioning element, draw a fifth line perpendicular to the first line; If the fifth straight line intersects the fetal head contour at the first target point, then the distance between the center point of the second positioning member and the first target point is taken as the distance between the pubic symphysis and the fetal head.

8. The method according to claim 3, characterized in that, The determination of detection parameters based on the pubic symphysis contour and the fetal head contour includes: Determine the center points of the first and second positioning elements in the ultrasound image; A first straight line is obtained by connecting the center points of the first positioning element and the second positioning element. Determine the longest axis in the tire head profile; Draw a sixth line parallel to the first line on the side facing the tire head contour, and the sixth line intersects the longest axis; The angle between the sixth straight line and the longest axis is taken as the tire head direction angle.

9. The method according to claim 1, characterized in that, Determining the pubic symphysis contour and fetal head contour based on the ultrasound image includes: The outline of the positioning element and the fetal head region are determined in the ultrasound image; The contour of the positioning element is determined as the contour of the pubic symphysis, and feature points are extracted from the fetal head region to obtain fetal head feature points. The fetal head feature points are fitted to obtain the fetal head contour.

10. The method according to claim 1, characterized in that, The size of the positioning element is no larger than the projected size of the pubic symphysis.

11. An ultrasonic imaging device, characterized in that, The ultrasound imaging device includes: An ultrasound probe is used to emit ultrasound signals to a target tissue and to collect the ultrasound echo signals reflected by the target tissue. Memory, used to store computer programs; A processor, connected to the ultrasound probe and the memory respectively, is used to execute the computer program based on the ultrasound echo signal to implement the method as described in any one of claims 1-10.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program, which, when executed by a processor, is used to implement the method as described in any one of claims 1-10.

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