Method, device and computer equipment for simulating postoperative results of knee replacement surgery

Abstract

This application relates to a method, apparatus, and computer equipment for simulating postoperative outcomes of knee arthroplasty. The method includes: acquiring preoperative full-length radiographic planning results; the preoperative full-length radiographic planning results include the femur with a first prosthesis component and the tibia with a second prosthesis component; based on the full-length radiographic planning results, obtaining the prosthesis reference planes of the femur and tibia; correcting the femur and tibia to their postoperative standard positions, generating a postoperative full-length radiographic simulation result; wherein, the postoperative standard position refers to the position corresponding to the prosthesis reference planes of the tibia and femur under knee joint space balance. This method can improve the accuracy of predicting the actual clinical outcomes of knee arthroplasty.

Description

Technical Field

[0001] This application relates to the field of intelligent medical technology, and in particular to a method, device and computer equipment for simulating the results of knee replacement surgery. Background Technology

[0002] Knee replacement surgery is a treatment method to restore knee joint function. It involves removing joint surfaces that the body cannot repair on its own and replacing the damaged joint with artificial joint components, correcting limb alignment, eliminating knee pain, and maintaining joint stability. Knee replacement surgery often requires preoperative planning to determine the prosthesis placement, which guides the procedure.

[0003] Current knee replacement surgery planning primarily utilizes preoperative CT (Computed Tomography) scans to segment and reconstruct CT images. The prosthesis is then fused with the CT images using implant placement techniques to determine its placement. However, this planning method often results in significant discrepancies between the planned and final postoperative outcomes. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, device, and computer equipment for simulating postoperative outcomes of knee replacement surgery that can improve the accuracy of surgical prediction in actual clinical practice, addressing the aforementioned technical problems.

[0005] In a first aspect, this application provides a method for simulating the outcome after knee replacement surgery, the method comprising:

[0006] Obtain the preoperative full-length radiograph planning results; the preoperative full-length radiograph planning results include the femur equipped with the first prosthesis component and the tibia equipped with the second prosthesis component;

[0007] Based on the full-length radiograph planning results, the femur and tibia are corrected to the postoperative standard position, generating the postoperative full-length radiograph simulation results; where the postoperative standard position refers to the position corresponding to the prosthesis reference plane of the tibia and the prosthesis reference plane of the femur under the knee joint space balance state.

[0008] In one embodiment, after the step of correcting the femur and tibia to their postoperative standard positions and generating a postoperative full-length radiograph simulation result, the method further includes:

[0009] Based on the feature point recognition algorithm, the simulation results of the full-length postoperative film are identified and processed to determine the postoperative simulation force line and the first force line angle corresponding to the postoperative simulation force line.

[0010] Based on the feature point recognition algorithm, the preoperative full-length film planning results are identified and processed to determine the preoperative actual force line and the second force line angle corresponding to the preoperative actual force line.

[0011] A comparative analysis of the first and second force line angles was conducted to obtain the comparison results.

[0012] In one embodiment, the steps of correcting the femur and tibia to their postoperative standard positions and generating a postoperative full-length radiograph simulation result include:

[0013] Based on the adjustment data of the target gap, the femur and / or tibia are adjusted to correct the femur and tibia to the postoperative standard position, and the postoperative full-length simulation results are generated; the target gap is the gap between the first prosthesis component and the second prosthesis component under the knee joint gap balance state.

[0014] In one embodiment, the target gap includes a first gap and a second gap;

[0015] The first gap is determined by a first line connecting a first point on the first prosthesis assembly and a first point on the second prosthesis assembly; and the first line is parallel to the force line of the femur.

[0016] The second gap is determined by a second line connecting a second point on the first prosthesis assembly and a second point on the second prosthesis assembly; and the second line is parallel to the force line of the femur.

[0017] In one embodiment, the first connecting line is a line passing through the medial condyle of the femur, or the first connecting line is a line passing through the first lowest point of the first prosthesis component; wherein, the first lowest point is a point on the surface of the first prosthesis component facing the second prosthesis component;

[0018] The second line is either a line passing through the lateral condyle of the femur or a line passing through the second lowest point of the first prosthesis component; wherein the second lowest point is a point on the surface of the first prosthesis component facing the second prosthesis component.

[0019] In one embodiment, the steps of adjusting the femur and / or tibia according to the adjustment data of the target gap, correcting the femur and tibia to the postoperative standard position, and generating the postoperative full-length simulation result include:

[0020] Based on the gap distance value of the target gap, calculate the adjustment data of the target gap; the adjustment data of the target gap includes the rotational translation of the femur and / or the rotational translation of the tibia;

[0021] Adjustments are made to the femur and / or tibia based on the amount of rotational translation of the femur and / or tibia to correct them to the standard postoperative position.

[0022] After correcting the femur and / or tibia to the standard postoperative position, the rotation and translation of the image data are calculated based on the image data corresponding to the preoperative full-length radiograph planning results, and the postoperative full-length radiograph simulation results are generated based on the rotation and translation of the image data.

[0023] In one embodiment, the steps of correcting the femur and tibia to their postoperative standard positions and generating a postoperative full-length radiograph simulation result include:

[0024] Based on the adjustment data of the target angle, the femur and / or tibia are aligned and corrected to the postoperative standard position, and the postoperative full-length simulation results are generated; the target angle is the angle between the prosthesis force line of the femur before correction and the prosthesis force line of the tibia before correction.

[0025] In one embodiment, the force line of the femur and the inversion / valgus angle of the femoral prosthesis are zero;

[0026] The force line of the tibia and the inversion / exversion angle of the tibial prosthesis are zero.

[0027] In one embodiment, the steps of aligning the femur and / or tibia according to the adjustment data of the target angle, correcting the femur and tibia to the postoperative standard position, and generating the postoperative full-length simulation result include:

[0028] Calculate the adjustment data for the target angle; the adjustment data for the target angle includes the angle value of the target angle;

[0029] Based on the target angle value, the femur and / or tibia are aligned and corrected to the standard postoperative position;

[0030] After correcting the femur and tibia to their postoperative standard positions, the rotation and translation of the image data are calculated based on the image data corresponding to the preoperative full-length radiograph planning results, and the postoperative full-length radiograph simulation results are generated based on the rotation and translation of the image data.

[0031] In one embodiment, the step of obtaining the preoperative full-length radiograph planning results includes:

[0032] Obtain the prosthesis model information and CT image information corresponding to the pre-placed position;

[0033] The prosthesis model information and CT image information are fused to obtain the target fused image;

[0034] Based on the X-ray flattening algorithm, the target fusion image is processed to obtain the preoperative full-length film planning result; the preoperative full-length film planning result is a two-dimensional image.

[0035] In one embodiment, the postoperative full-length radiograph simulation result is a two-dimensional image.

[0036] Secondly, this application also provides a simulation device for postoperative outcomes of knee replacement surgery, the device comprising:

[0037] The results acquisition module is used to acquire the preoperative full-length radiograph planning results; the preoperative full-length radiograph planning results include the femur equipped with the first prosthesis component and the tibia equipped with the second prosthesis component;

[0038] The postoperative simulation module is used to correct the femur and tibia to the postoperative standard position based on the full-length radiograph planning results, and generate the postoperative full-length radiograph simulation results. The postoperative standard position refers to the position of the prosthesis reference plane of the tibia and the prosthesis reference plane of the femur under the knee joint space balance state.

[0039] Thirdly, this application also provides a computer device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described method.

[0040] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described method.

[0041] The aforementioned method, device, and computer equipment for simulating postoperative outcomes of knee replacement surgery acquire preoperative full-length radiographic planning results. These preoperative full-length radiographic planning results include the femur with the first prosthesis component and the tibia with the second prosthesis component. Based on the preoperative full-length radiographic planning results, the femur and tibia are corrected to their postoperative standard positions, generating postoperative full-length radiographic simulation results. The postoperative standard position refers to the position corresponding to the prosthesis reference planes of the tibia and femur in a balanced knee joint space. Compared to traditional planning methods, this application, through preoperative full-length radiographic planning results, can correct and adjust the femur and / or tibia to a balanced knee joint state and obtain postoperative full-length radiographic simulation results. Therefore, the preoperative full-length radiographic simulation results can provide a more accurate simulation effect, and the postoperative full-length radiographic simulation results can realistically reflect the results of osteotomy correction on the femoral and tibial sides, thus realistically reflecting the expected surgical outcome. Attached Figure Description

[0042] Figure 1 This is a diagram illustrating the application environment of a simulation method for postoperative outcomes of knee arthroplasty in one embodiment.

[0043] Figure 2 This is a flowchart illustrating a method for simulating postoperative outcomes of knee replacement surgery in one embodiment.

[0044] Figure 3 This is a flowchart illustrating a method for simulating the outcome of knee replacement surgery in another embodiment;

[0045] Figure 4 This is a flowchart illustrating the steps of adjusting the femur and / or tibia according to the adjustment data of the target gap in one embodiment, correcting the femur and tibia to the postoperative standard position, and generating the postoperative full-length simulation result.

[0046] Figure 5 An example diagram of the femur and tibia in the step of adjusting the femur and / or tibia according to the amount of rotational translation in a specific embodiment;

[0047] Figure 6 An example diagram of the femur and tibia in the step of adjusting the femur and / or tibia according to the amount of rotational translation in another specific embodiment;

[0048] Figure 7 This is an example diagram of the femur and tibia in the step of adjusting the femur and / or tibia according to the amount of rotational translation in yet another specific embodiment;

[0049] Figure 8 This is a flowchart illustrating the steps of aligning the femur and / or tibia according to the adjustment data of the target angle in one embodiment, correcting the femur and tibia to the postoperative standard position, and generating the postoperative full-length simulation result.

[0050] Figure 9 This is a schematic diagram illustrating the varus / valgus angle between the femur and the prosthesis in a specific embodiment.

[0051] Figure 10 This is a schematic diagram of the varus / valgus angle between the tibia and the prosthesis in a specific embodiment;

[0052] Figure 11 This is an example diagram of the femur and tibia in the step of adjusting the femur and / or tibia according to the angle value of the target angle in a specific embodiment;

[0053] Figure 12 This is an example diagram of the femur and tibia in the step of adjusting the femur and / or tibia according to the angle value of the target angle in another specific embodiment;

[0054] Figure 13 This is an example diagram of the femur and tibia in the step of adjusting the femur and / or tibia according to the angle value of the target angle in another specific embodiment;

[0055] Figure 14 This is a structural block diagram of a simulation device for postoperative results of knee replacement surgery in one embodiment.

[0056] Figure 15 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0058] As described in the background section, the existing planning method has low accuracy in predicting surgical outcomes in actual clinical practice. This is because existing techniques primarily use preoperative CT scans to segment and reconstruct CT images, then fuse these images with prosthesis placement technology to achieve the prosthesis positioning result. This planning method can only reflect the prosthesis placement on the femoral or tibial side before correction, and cannot accurately reflect the planning result after osteotomy correction on the femoral and tibial sides. In addition, existing techniques also have the following problems: prosthesis positioning is localized and cannot reflect the full-length planning result; the prosthesis positioning is the placement result before correction, which differs significantly from the final result; and CT images cannot accurately obtain the force line angles of the entire length, etc.

[0059] The knee replacement surgery outcome simulation method provided in this application embodiment can be applied to, for example... Figure 1 In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be integrated onto server 104 or located in the cloud or on other network servers. The data storage system can store the preoperative full-length planning results. Terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. Server 104 can be implemented using a standalone server or a server cluster consisting of multiple servers.

[0060] In one embodiment, such as Figure 2 As shown, a method for simulating the outcome of knee arthroplasty is provided, and this method is applied to... Figure 1 Taking server 104 as an example, the following steps are included:

[0061] Step S202: Obtain the preoperative full-length radiograph planning results; the preoperative full-length radiograph planning results include the femur equipped with the first prosthesis component and the tibia equipped with the second prosthesis component.

[0062] Among them, the preoperative full-length film planning result can be the simulation planning result obtained after reconstructing the preoperative full-length medical image.

[0063] Specifically, preoperative full-length radiographs of the femur allow surgeons to more intuitively understand the overall force line planning, which aligns better with their habit of viewing the overall force line. Full-length force line planning addresses the issue of only being able to see the planning of a localized area of ​​the knee joint. Adjustments and corrections are made based on the femur with the first prosthesis component and the tibia with the second prosthesis component to achieve a more accurate prosthesis placement result.

[0064] Step S204: Based on the full-length radiograph planning results, the femur and tibia are corrected to the postoperative standard position, and the postoperative full-length radiograph simulation results are generated; whereby the postoperative standard position refers to the position corresponding to the prosthesis reference plane of the tibia and the prosthesis reference plane of the femur under the knee joint space balance state.

[0065] The standard postoperative position refers to the position of the femur and tibia after knee replacement surgery, when the knee joint is properly corrected. The postoperative full-length radiograph simulation result can be the corrected virtual simulation postoperative full-length radiograph planning result, or a full-length virtual simulation after knee replacement surgery.

[0066] Specifically, based on the full-length radiograph planning results, the positions of the femur and / or tibia are adjusted to balance the knee joint space and generate postoperative full-length radiograph simulation results. For example, knee joint balance can be achieved by the first gap distance between the femoral and tibial prostheses being equal to the second gap distance, with the first and second gaps located on either side of the knee joint center point; or by the femoral force line (femoral force line) coinciding with the tibial force line (tibial force line). In one example, the tibia can be kept stationary while the femur is adjusted; or the femur can be kept stationary while the tibia is adjusted; or both the femur and tibia can be adjusted simultaneously to achieve knee joint space balance.

[0067] In this embodiment, the preoperative full-length radiograph planning results are obtained. These results include the femur equipped with a first prosthesis component and the tibia equipped with a second prosthesis component. Based on the preoperative full-length radiograph planning results, the femur and tibia are corrected to their postoperative standard positions, generating a postoperative full-length radiograph simulation result. The postoperative standard position refers to the position corresponding to the prosthesis reference planes of the tibia and femur in a balanced knee joint state. Compared to traditional planning methods, this application obtains the prosthesis reference planes of the femur and tibia through preoperative full-length radiograph planning results. This allows for the correction and adjustment of the femur and tibia to a balanced knee joint state, resulting in a postoperative full-length radiograph simulation result. Therefore, the preoperative full-length radiograph simulation result provides a more accurate simulation effect, and the postoperative full-length radiograph simulation result accurately reflects the results of osteotomy correction on the femoral and tibial sides, thus accurately reflecting the expected surgical outcome.

[0068] In one embodiment, after the step of correcting the femur and tibia to their postoperative standard positions and generating a postoperative full-length radiograph simulation result, the method further includes:

[0069] Based on the feature point recognition algorithm, the simulation results of the full-length postoperative film are identified and processed to determine the postoperative simulation force line and the first force line angle corresponding to the postoperative simulation force line.

[0070] Based on the feature point recognition algorithm, the preoperative full-length film planning results are identified and processed to determine the preoperative actual force line and the second force line angle corresponding to the preoperative actual force line.

[0071] A comparative analysis of the first and second force line angles was conducted to obtain the comparison results.

[0072] The feature point recognition algorithm can be any algorithm that can identify key feature points.

[0073] Specifically, feature point recognition algorithms can be used to identify and process the postoperative full-length film simulation results, and feature points in the postoperative full-length film simulation results can be identified. Based on the feature points in the postoperative full-length film simulation results, the postoperative simulation force line and the first force line angle corresponding to the postoperative simulation force line can be determined.

[0074] By using a feature point recognition algorithm, the preoperative full-length radiograph planning results are processed to identify the feature points in the preoperative full-length radiograph planning results. Based on the feature points in the preoperative full-length radiograph planning results, the preoperative actual force line and the corresponding second force line angle can be determined.

[0075] By comparing and analyzing the first and second force line angles, the results of the force line angle comparison before and after the operation were obtained.

[0076] In this embodiment, by comparing the angle corresponding to the actual full-length force line before surgery with the angle corresponding to the simulated full-length force line after surgery, an angle comparison result can be obtained. This can provide a planning result that conforms to the doctor's reading habits and can more accurately reflect the planning angle of knee replacement surgery, thereby truly reflecting the expected surgical effect.

[0077] In one embodiment, such as Figure 3 As shown, after the steps of correcting the femur and tibia to their postoperative standard positions and generating a postoperative full-length simulation result, the method further includes:

[0078] Step S302: Based on the feature point recognition algorithm, the simulation results of the full-length postoperative radiograph are processed to obtain the center point of the first hip joint and the center point of the first talus.

[0079] Step S304: Determine the postoperative simulated force line and the first force line angle corresponding to the postoperative simulated force line based on the center point of the first hip joint and the center point of the first talus.

[0080] Step S306: Based on the feature point recognition algorithm, the preoperative full-length radiograph planning results are identified and processed to obtain the center point of the second hip joint and the center point of the second talus.

[0081] Step S308: Determine the preoperative actual force line and the corresponding second force line angle based on the center point of the second hip joint and the center point of the second talus.

[0082] Step S310: Compare and analyze the first force line angle and the second force line angle to obtain the comparison results of the first force line angle and the second force line angle.

[0083] The first hip joint center point refers to the center point of the hip joint in the postoperative full-length radiograph simulation result. The first talus center point refers to the center point of the talus in the postoperative full-length radiograph simulation result. The postoperative simulated force line refers to the full-length force line after knee replacement surgery. The second hip joint center point refers to the center point of the hip joint in the preoperative full-length radiograph planning result. The second talus center point refers to the center point of the talus in the preoperative full-length radiograph planning result. The preoperative actual force line refers to the full-length force line in the preoperative full-length radiograph planning result of knee replacement surgery.

[0084] Specifically, a feature point recognition algorithm is used to identify feature points in the postoperative full-length radiograph simulation results, obtaining the hip joint center point and talus center point in the simulation results. Then, based on these points, the full-length force line after knee replacement surgery, and the corresponding force line angle (first force line angle), are determined. It is understood that both the left and right legs after knee replacement surgery should possess the full-length force line and corresponding force line angle.

[0085] Using a feature point recognition algorithm, feature points are identified in the preoperative full-length radiograph planning results to obtain the hip joint center point and talus center point. Based on these points, the actual full-length force line and the preoperative force line angle (second force line angle) are determined. It is understood that both the left and right legs in the preoperative full-length radiograph planning results should possess the actual full-length force line and corresponding angle before knee replacement surgery.

[0086] Specifically, by comparing and analyzing the angles corresponding to the actual full-length force line before surgery with the angles corresponding to the simulated full-length force line after surgery, we can obtain the angle comparison results of the two full-length force lines before and after knee replacement surgery.

[0087] In this embodiment, by using the center point of the hip joint and the center point of the talus, the angle comparison results of the full-length force line before and after knee replacement surgery are obtained, which can more accurately reflect the planning angle of knee replacement surgery.

[0088] In one embodiment, the step of correcting the femur and tibia to their postoperative standard positions and generating a postoperative full-length radiograph simulation result includes:

[0089] Based on the adjustment data of the target gap, the femur and / or tibia are adjusted to correct the femur and tibia to the postoperative standard position, and the postoperative full-length simulation results are generated; the target gap is the gap between the first prosthesis component and the second prosthesis component under the knee joint gap balance state.

[0090] The target gap adjustment data refers to the data used to adjust the femur and / or tibia to a balanced state of the knee joint.

[0091] Specifically, data is obtained to adjust the femur and / or tibia as needed. Based on this adjustment data, the femur and / or tibia are adjusted to achieve their standard postoperative positions. Furthermore, postoperative full-length radiograph simulation results can be generated based on the adjustment data.

[0092] In this embodiment, the femur and / or tibia are adjusted using the target gap adjustment data. Based on this adjustment data, a full-length postoperative simulation image can be generated, providing a virtual simulation of the osteotomy plan. This realistically reflects the final osteotomy, thus accurately reflecting the planned structure of the knee replacement surgery and the expected surgical outcome.

[0093] In one embodiment, the target gap includes a first gap and a second gap;

[0094] The first gap is determined by a first line connecting a first point on the first prosthesis assembly and a first point on the second prosthesis assembly; and the first line is parallel to the force line of the femur.

[0095] The second gap is determined by a second line connecting a second point on the first prosthesis assembly and a second point on the second prosthesis assembly; and the second line is parallel to the force line of the femur.

[0096] The first point of the first prosthesis component may be the first lowest point on the first prosthesis component; the second point of the first prosthesis component may be the second lowest point on the first prosthesis component.

[0097] Specifically, a straight line runs parallel to the force line of the femur, intersecting a first point on the first prosthesis component and a first point on the second prosthesis component. The first gap is obtained by connecting the first point on the first prosthesis component and the first point on the second prosthesis component. Another straight line runs parallel to the force line of the first prosthesis component, intersecting a second point on the first prosthesis component and a second point on the second prosthesis component. The second gap is obtained by connecting the second point on the first prosthesis component and the second point on the second prosthesis component.

[0098] In this embodiment, by determining the first gap and the second gap, the distance between the first gap and the second gap can be made equal, thereby adjusting the knee joint to a balanced state and improving the planning speed of knee replacement surgery.

[0099] In one embodiment, the first connecting line is a line passing through the medial condyle of the femur, or the first connecting line is a line passing through the first lowest point of the first prosthesis component; wherein, the first lowest point is a point on the surface of the first prosthesis component facing the second prosthesis component;

[0100] The second line is either a line passing through the lateral condyle of the femur or a line passing through the second lowest point of the first prosthesis component; wherein the second lowest point is a point on the surface of the first prosthesis component facing the second prosthesis component.

[0101] In this context, the medial condyle of the femur is the point corresponding to the medial condyle of the femur in the two-dimensional image. The first lowest point is the point on the line corresponding to the face of the first prosthesis component facing the second prosthesis component in the two-dimensional image. The lateral condyle of the femur is the point corresponding to the medial condyle of the femur in the two-dimensional image. The second lowest point is the point on the line corresponding to the face of the first prosthesis component facing the second prosthesis component in the two-dimensional image.

[0102] In this embodiment, the first line passes through the medial condyle of the femur or the first lowest point of the first prosthesis component, and the second line passes through the lateral condyle of the femur or the second lowest point of the first prosthesis component; by determining the first gap and the second gap through easily identifiable points, the planning speed can be improved.

[0103] In one embodiment, such as Figure 4 As shown, the steps for adjusting the femur and / or tibia based on the target gap adjustment data, correcting the femur and tibia to the postoperative standard position, and generating postoperative full-length simulation results include:

[0104] Step S402: Calculate the adjustment data of the target gap based on the gap distance value of the target gap; the adjustment data of the target gap includes the rotational translation of the femur and / or the rotational translation of the tibia.

[0105] The target joint gap distance can be multiple; it can be the distance between two points obtained by passing through a preset point and intersecting the femoral force line at the first and second prosthesis components respectively. It can be understood that before knee replacement surgery, the knee joint gap is in an unbalanced state. By adjusting the femur and / or tibia, the gap distance value of the first gap can be made equal to the gap distance value of the second gap, at which point the knee joint gap is in a balanced state. The first and second points on the first prosthesis component can be the two lowest points on the first prosthesis component.

[0106] Specifically, a straight line is drawn through a point on the femur (medial condyle) and intersects the first and second prosthesis components along a direction parallel to the force line of the femur, yielding a first gap distance value. Similarly, a line is drawn through another point on the femur (lateral condyle) and intersects the first and second prosthesis components along a direction parallel to the force line of the femur, yielding a second gap distance value. Based on the first and second gap distance values, adjustment data for the target gap is calculated. Using this adjustment data, the femur and / or tibia are adjusted so that the prosthesis osteotomy surface of the femur is parallel to the prosthesis osteotomy surface of the tibia.

[0107] Step S404: Adjust the femur and / or tibia according to the amount of rotational translation of the femur and / or the amount of rotational translation of the tibia, and correct the femur and tibia to the standard postoperative position.

[0108] Specifically, the tibia can be kept stationary while the femur is adjusted according to its rotational translation, correcting it to the position corresponding to the knee joint space balance; the femur can be kept stationary while the tibia is adjusted according to its rotational translation, correcting it to the position corresponding to the knee joint space balance; or both the femur and tibia can be adjusted simultaneously according to their rotational translations, correcting them to the positions corresponding to the knee joint space balance.

[0109] Step S406: After correcting the femur and / or tibia to the postoperative standard position, calculate the rotation and translation of the image data based on the image data corresponding to the preoperative full-length radiograph planning results, and generate the postoperative full-length radiograph simulation results based on the rotation and translation of the image data.

[0110] Among them, the rotation and translation amount of the image data refers to the data rotation and translation amount between the preoperative full-length film planning result and the postoperative full-length film simulation result.

[0111] Specifically, by adjusting the femur and / or tibia, the femur and tibia can be corrected to the standard postoperative position. Based on the image data corresponding to the preoperative full-length radiograph planning results and the image data after the femur and tibia are corrected to the standard postoperative position, the rotation and translation amount of the image data is obtained, and the postoperative full-length radiograph simulation result is generated based on the rotation and translation amount of the image data.

[0112] In this embodiment, the femur and / or tibia are adjusted by adjusting the data, and the postoperative full-length radiograph simulation results are generated based on the image data corresponding to the preoperative full-length radiograph planning results and the image data after the femur and tibia are corrected to the postoperative standard position. This can provide virtual simulation prosthesis planning results, which can provide more accurate simulation effects. At the same time, the corrected osteotomy gap can be obtained, which can better reflect the expected surgical effect.

[0113] In a specific embodiment, Figure 5 As shown, taking the left leg as an example, passing through the medial condyle, along the force line parallel to the femur, two points intersect the mounting surfaces of the femoral prosthesis (first prosthesis component) and the tibial prosthesis (second prosthesis component), respectively, namely P1 (the first point on the first prosthesis component) and P2 (the first point on the second prosthesis component). The line connecting these two points represents the medial gap value (first gap distance value) between the femur and tibia, denoted as ΔX1. Passing through the lateral condyle, along the force line parallel to the femur, two points intersect the mounting surfaces of the femoral prosthesis (first prosthesis component) and the tibial prosthesis (second prosthesis component), respectively, namely P3 (the second point on the first prosthesis component) and P4 (the second point on the second prosthesis component). The line connecting these two points represents the lateral gap value (second gap distance value) between the femur and tibia, denoted as ΔX2. Setting ΔX1 = ΔX2, that is, it is possible to make the first gap value and the second gap value between the femoral prosthesis and the tibial prosthesis equal.

[0114] The adjustment data can be obtained using the following expression (1):

[0115]

[0116] Where ΔY1 is the distance between P1 and P3. Adjust the angle data for the femur. The angle is calculated using expression (1). It can keep the tibia still, while the femur rotates at different angles. go through After the angle is transformed and the center points of the femoral and tibial knee joints are aligned, the gap distance between the femoral and tibial prosthesis osteotomy surfaces is equal. This ensures that the first and second gap distance values ​​between the femoral and tibial prostheses are equal, generating a postoperative virtual simulation result (postoperative full-length X-ray simulation result). The postoperative virtual simulation result is preferably a simulated full-length X-ray image.

[0117] In a specific embodiment, Figure 6 As shown, taking the left leg as an example, passing through the medial condyle, along the direction parallel to the force line of the femur, two points intersect the mounting surfaces of the femoral prosthesis (first prosthesis component) and the tibia (second prosthesis component), respectively, namely P5 (the first point on the first prosthesis component) and P6 (the first point on the second prosthesis component). The line connecting these two points represents the medial gap value (first gap distance value) between the femur and tibia, denoted as ΔX3. Passing through the lateral condyle, along the direction parallel to the force line of the femur, two points intersect the mounting surfaces of the femoral prosthesis (first prosthesis component) and the tibia (second prosthesis component), respectively, namely P7 (the second point on the first prosthesis component) and P8 (the second point on the second prosthesis component). The line connecting these two points represents the lateral gap value (second gap distance value) between the femur and tibia, denoted as ΔX4. Setting ΔX3 = ΔX4, that is, the gap between the femoral prosthesis and the tibia prosthesis can be balanced. The adjustment data can be obtained using the following expression (2):

[0118]

[0119] Where σ represents the tibial adjustment angle data, and ΔY2 represents the distance between P6 and P8. The angle σ calculated by expression (2) keeps the femur stationary while the tibia rotates at an angle σ. After the transformation of the angle σ and alignment of the femoral knee joint center point and the tibial knee joint center point, the gap distance between the femoral prosthesis osteotomy surface and the tibial prosthesis osteotomy surface becomes equal. This ensures that the first and second gap distance values ​​between the femoral and tibial prostheses are equal, generating a postoperative virtual simulation result. The postoperative virtual simulation result is preferably a full-length simulated X-ray image.

[0120] In a specific embodiment, Figure 7As shown, taking the left leg as an example, passing through the medial condyle, along the direction of the force line parallel to the femur, two points intersect at the mounting surfaces of the femoral prosthesis (first prosthesis component) and the tibial prosthesis (second prosthesis component), respectively, namely Q1 (the first point on the first prosthesis component) and Q2 (the first point on the second prosthesis component). The line connecting the two points is the medial gap value (first gap distance value) between the femur and the tibia, set as ΔX5; passing through the lateral condyle, along the direction of the force line of the femur, two points intersect at the mounting surfaces of the femoral prosthesis (first prosthesis component) and the tibial prosthesis (first prosthesis component), respectively, namely Q3 (the second point on the first prosthesis component) and Q4 (the second point on the second prosthesis component). The line connecting the two points is the lateral gap value (second gap distance value) between the femur and the tibia, set as ΔX6; let ΔX5 = ΔX6, that is, the gap between the femoral prosthesis and the tibial prosthesis can be balanced. The adjustment data can be obtained through the following expression (3):

[0121]

[0122] Where α represents the adjustment angle data of the tibia, β represents the adjustment angle data of the femur, ΔY3 represents the distance between Q1 and Q3, and ΔY4 represents the distance between Q2 and Q4. The angles α and β calculated by expression (3), the tibial rotation angle α, the femoral rotation angle β, the femoral prosthesis after α transformation, the tibial prosthesis after β transformation, and after alignment of the femoral knee joint center point and the tibial knee joint center point, result in equal gaps between the femoral prosthesis osteotomy surface and the tibial prosthesis osteotomy surface. This ensures that the first and second gap values ​​between the femoral and tibial prostheses are equal, generating a postoperative virtual simulation result. The postoperative virtual simulation result is preferably a simulated full-length X-ray image.

[0123] In one embodiment, the step of correcting the femur and tibia to their postoperative standard positions and generating a postoperative full-length radiograph simulation result includes:

[0124] Based on the adjustment data of the target angle, the femur and / or tibia are aligned and corrected to the postoperative standard position, and the postoperative full-length simulation results are generated; the target angle is the angle between the prosthesis force line of the femur before correction and the prosthesis force line of the tibia before correction.

[0125] The target angle adjustment data refers to the adjustment data used to adjust the angle between the pre-correction femoral prosthesis force line and the pre-correction tibial prosthesis force line to zero. This means aligning the femur and / or tibia so that the femoral prosthesis force line coincides with the tibial prosthesis force line. The femoral prosthesis force line refers to the femoral force line after the preoperative prosthesis and femur assembly. The tibial prosthesis force line refers to the tibial force line after the preoperative prosthesis and tibia assembly.

[0126] Specifically, data is obtained to guide the adjustment of the angle between the femoral and tibial prosthesis force lines. Based on this target angle adjustment data, the femur and / or tibia are aligned to obtain the femur and tibia in their standard postoperative positions. At this point, the gap between the femoral and tibial prostheses is balanced, and a postoperative virtual simulation result is generated. The postoperative virtual simulation result is preferably a simulated full-length X-ray image.

[0127] In this embodiment, the femur and / or tibia are aligned using the target angle adjustment data, and postoperative full-length simulation results can be generated based on the target angle adjustment data. This provides virtual simulation of the planning results after osteotomy, realistically reflecting the final osteotomy, and thus realistically reflecting the planned structure of knee replacement surgery, so that doctors can better judge the expected osteotomy effect.

[0128] In one embodiment, such as Figure 8 As shown, the steps for aligning the femur and / or tibia according to the adjustment data of the target angle, correcting the femur and tibia to the postoperative standard position, and generating the postoperative full-length simulation result include:

[0129] Step S802: Calculate the adjustment data of the target angle; the adjustment data of the target angle includes the angle value of the target angle.

[0130] Specifically, the angle between the prosthetic force line of the femur before correction (the force line of the femur) and the prosthetic force line of the tibia before correction (the force line of the tibia) is calculated to obtain the angle value of the target angle, and the angle value of the target angle is confirmed as the adjustment data of the target angle.

[0131] Step S804: According to the angle value of the target angle, the femur and / or tibia are aligned and corrected to the postoperative standard position.

[0132] Specifically, the tibia can be kept still while the femur is adjusted according to the target angle value, correcting the femur to the position corresponding to the knee joint space balance; the femur can be kept still while the tibia is adjusted according to the target angle value, correcting the tibia to the position corresponding to the knee joint space balance; or both the femur and tibia can be adjusted simultaneously according to the target angle value, correcting both the femur and tibia to the position corresponding to the knee joint space balance.

[0133] Step S806: After correcting the femur and tibia to the postoperative standard position, calculate the rotation and translation of the image data based on the image data corresponding to the preoperative full-length radiograph planning results, and generate the postoperative full-length radiograph simulation results based on the rotation and translation of the image data.

[0134] Specifically, by adjusting the femur and / or tibia, the femur and tibia can be corrected to the standard postoperative position. Based on the image data corresponding to the preoperative full-length radiograph planning results and the image data after the femur and tibia are corrected to the standard postoperative position, the rotation and translation amount of the image data is obtained, and the postoperative full-length radiograph simulation result is generated based on the rotation and translation amount of the image data.

[0135] In this embodiment, the femur and / or tibia are aligned by adjusting the target angle data, and the postoperative full-length simulation results are generated based on the image data corresponding to the preoperative full-length radiograph planning results and the image data after the femur and tibia are corrected to the postoperative standard position. This can provide virtual simulation prosthesis planning results, provide more accurate simulation effects, and thus truly reflect the expected surgical results.

[0136] In one embodiment, the force line of the femur and the varus / valgus angle of the femoral prosthesis are zero; the force line of the tibia and the varus / valgus angle of the tibial prosthesis are zero. In this case, the configuration of the first prosthesis assembly and the femur, and the configuration of the second prosthesis assembly and the tibia are achieved. Specifically, the varus / valgus angle of the force line of the femur 610 and the femoral prosthesis 620 is as follows: Figure 9 As shown, it is the angle between the force line of the femur and the perpendicular line (normal) of the femoral prosthesis on plane 1; the force line of the tibia 710 and the varus / valgus angle of the tibial prosthesis 720 are as follows. Figure 10 As shown, it is the angle between the force line of the tibia and the perpendicular line (normal) of the tibial prosthesis on plane 2.

[0137] Specifically, such as Figure 11 As shown, the force line of the femur is set to 0° with the varus / valgus angle of the femoral prosthesis (first prosthesis component), and perpendicular to the reference plane of the femoral prosthesis (first prosthesis component). Similarly, the force line of the tibia is set to 0° with the varus / valgus angle of the tibial prosthesis (second prosthesis component), and perpendicular to the reference plane of the tibial prosthesis (second prosthesis component), thus achieving the proper configuration of the prosthesis components and bones. Then, the angle between the force lines of the femur and tibia is calculated and set to γ ​​degrees. Keeping the femur stationary, the force line of the tibia is rotated γ degrees around the center of the tibial prosthesis (second prosthesis component) until it coincides with the force line of the femur. At this point, the femur and tibia are in their standard postoperative positions.

[0138] In a specific embodiment, Figure 12As shown, the force line of the femur is set to 0° with the varus / valgus angle of the femoral prosthesis (first prosthesis component), and the force line of the femur is perpendicular to the reference plane of the femoral prosthesis (first prosthesis component). The force line of the tibia is set to 0° with the varus / valgus angle of the tibial prosthesis (second prosthesis component), and the force line of the tibia is perpendicular to the reference plane of the tibial prosthesis (second prosthesis component). The angle between the force lines of the femur and the tibia is calculated and set as γ degrees. Keeping the tibia stationary, the force line of the tibia is rotated γ degrees around the center of the femoral prosthesis (first prosthesis component) until it coincides with the force line of the femur. At this point, the femur and tibia are in the standard postoperative position.

[0139] In a specific embodiment, Figure 13 As shown, the force line of the femur is set to 0° with the varus / valgus angle of the femoral prosthesis (first prosthesis component), and perpendicular to the reference plane of the femoral prosthesis (first prosthesis component). The force line of the tibia is set to 0° with the varus / valgus angle of the tibial prosthesis (second prosthesis component), and perpendicular to the reference plane of the tibial prosthesis (second prosthesis component). The angle between the force lines of the femur and the tibia is calculated and denoted as γ degrees. The femur and tibia are simultaneously aligned. The sum of the angles of rotation around the center of the femoral prosthesis (first prosthesis component) and the angles of rotation around the center of the tibial prosthesis (second prosthesis component) is γ degrees. For example, the femoral prosthesis (first prosthesis component) can be rotated by γ / 2 degrees, and the tibial prosthesis (second prosthesis component) can be rotated by γ / 2 degrees.

[0140] In one embodiment, the step of obtaining preoperative full-length radiograph planning results includes:

[0141] Obtain the prosthesis model information and CT image information corresponding to the pre-placed position;

[0142] The prosthesis model information and CT image information are fused to obtain the target fused image;

[0143] Based on the X-ray flattening algorithm, the target fusion image is processed to obtain the preoperative full-length film planning result; the preoperative full-length film planning result is a two-dimensional image.

[0144] The prosthesis model information refers to the information obtained after processing the prosthesis model. CT image information is obtained based on CT scans of the prosthesis model. The X-ray planarization algorithm refers to the algorithm for calculating digitally reconstructed radiographic images, which are the results of viewing 3D reconstructed images from the direction of the radiation field or from the direction of an X-ray target similar to a simulated positioning.

[0145] Specifically, doctors can position the prosthesis model based on the degree of matching between the prosthesis and CT image information, and obtain the prosthesis model information and CT image information corresponding to the pre-positioned position. Using an X-ray flattening algorithm, the target fusion image is processed to obtain the preoperative full-length film planning result.

[0146] In this embodiment, by fusing the prosthesis model information and CT image information, and by using the X-ray flattening algorithm to process the target fused image, preoperative X-ray scanning is not required. The three-dimensional image can be processed into a two-dimensional image to obtain a preoperative full-length X-ray plan, thereby reducing the cost of scanning X-rays. At the same time, it provides virtual simulation prosthesis planning results under X-ray, which can provide a more accurate simulation effect.

[0147] In one embodiment, the X-ray planarization algorithm is the DRR reconstruction algorithm.

[0148] In one embodiment, the prosthesis model information is determined based on the pixelation result of the prosthesis model.

[0149] In one embodiment, the postoperative full-length simulation result is a two-dimensional image. The two-dimensional image can be an X-ray, which can show the user, including but not limited to, the full-length force line in the standard postoperative position, the position of the first and second prosthesis components, and the assembly of the prosthesis components with their corresponding bones, so as to facilitate the doctor's better judgment on the expected osteotomy result.

[0150] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0151] Based on the same inventive concept, this application also provides a knee replacement postoperative outcome simulation device for implementing the above-mentioned knee replacement postoperative outcome simulation method. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more knee replacement postoperative outcome simulation device embodiments provided below can be found in the limitations of the knee replacement postoperative outcome simulation method described above, and will not be repeated here.

[0152] In one embodiment, such as Figure 14 As shown, a simulation device for postoperative results of knee replacement surgery is provided, including: a result acquisition module 510 and a postoperative simulation module 520, wherein:

[0153] The result acquisition module 510 is used to acquire the preoperative full-length radiograph planning results; the preoperative full-length radiograph planning results include the femur equipped with the first prosthesis component and the tibia equipped with the second prosthesis component.

[0154] The postoperative simulation module 520 is used to correct the femur and tibia to the postoperative standard position based on the full-length radiograph planning results and generate the postoperative full-length radiograph simulation results. The postoperative standard position refers to the position of the prosthesis reference plane of the tibia and the prosthesis reference plane of the femur under the knee joint space balance state.

[0155] In one embodiment, the device further includes: a postoperative force line angle acquisition module, a preoperative force line angle acquisition module, and an angle comparison module.

[0156] The postoperative force line angle acquisition module uses a feature point recognition algorithm to identify and process the postoperative full-length film simulation results, determining the postoperative simulated force line and its corresponding first force line angle. The preoperative force line angle acquisition module uses a feature point recognition algorithm to identify and process the preoperative full-length film planning results, determining the preoperative actual force line and its corresponding second force line angle. The angle comparison module compares and analyzes the first and second force line angles, obtaining a comparison result.

[0157] In one embodiment, the postoperative simulation module includes a target gap adjustment unit.

[0158] The target gap adjustment unit is used to adjust the femur and / or tibia according to the target gap adjustment data, correct the femur and tibia to the postoperative standard position, and generate the postoperative full-length simulation results; the target gap is the gap between the first prosthesis component and the second prosthesis component under the knee joint gap balance state.

[0159] In one embodiment, the target gap includes a first gap and a second gap;

[0160] The first gap is determined by a first line connecting a first point on the first prosthesis assembly and a first point on the second prosthesis assembly; and the first line is parallel to the force line of the femur.

[0161] The second gap is determined by the line connecting the second point on the first prosthesis assembly and the second point on the second prosthesis assembly; and the second line is parallel to the force line of the femur.

[0162] In one embodiment, the first connecting line is a line passing through the medial condyle of the femur, or the first connecting line is a line passing through the first lowest point of the first prosthesis component; wherein, the first lowest point is a point on the surface of the first prosthesis component facing the second prosthesis component;

[0163] The second line is either a line passing through the lateral condyle of the femur or a line passing through the second lowest point of the first prosthesis component; wherein the second lowest point is a point on the surface of the first prosthesis component facing the second prosthesis component.

[0164] In one embodiment, the target gap adjustment unit includes an adjustment data calculation unit, an adjustment unit, and a first simulation generation unit.

[0165] The adjustment data calculation unit is used to calculate the adjustment data of the target gap based on the gap distance value; the adjustment data of the target gap includes the rotational translation of the femur and / or the rotational translation of the tibia. The adjustment unit is used to adjust the femur and / or tibia according to the rotational translation of the femur and / or the rotational translation of the tibia, correcting the femur and tibia to their postoperative standard positions. The first simulation generation unit is used, after correcting the femur and / or tibia to their postoperative standard positions, to calculate the rotational translation of the image data based on the image data corresponding to the preoperative full-length radiograph planning results, and to generate the postoperative full-length radiograph simulation results based on the rotational translation of the image data.

[0166] In one embodiment, the postoperative simulation module further includes a target angle adjustment unit.

[0167] The target angle adjustment unit is used to align the femur and / or tibia according to the target angle adjustment data, correct the femur and tibia to the postoperative standard position, and generate the postoperative full-length simulation result; the target angle is the angle between the force line of the femur and the force line of the tibia before correction.

[0168] In one embodiment, the force line of the femur and the varus / valgus angle of the femoral prosthesis are zero; the force line of the tibia and the varus / valgus angle of the tibia prosthesis are zero.

[0169] In one embodiment, the target angle adjustment unit includes a target angle calculation module, a correction unit, and a second simulation generation unit.

[0170] The target angle calculation module is used to calculate the adjustment data for the target angle; the adjustment data includes the angle value of the target angle. The correction unit is used to align the femur and / or tibia according to the angle value of the target angle, correcting the femur and tibia to the standard postoperative position. The second simulation generation unit is used to calculate the rotation and translation of the image data based on the image data corresponding to the preoperative full-length radiograph planning results, after correcting the femur and tibia to the standard postoperative position, and generate the postoperative full-length radiograph simulation result based on the rotation and translation of the image data.

[0171] In one embodiment, the result acquisition module includes an information acquisition unit, a fusion processing unit, and a preoperative planning acquisition unit.

[0172] The information acquisition unit acquires the prosthesis model information and CT image information corresponding to the pre-placed position. The fusion processing unit fuses the prosthesis model information and CT image information to obtain the target fused image. The pre-planning acquisition unit processes the target fused image based on the X-ray planarization algorithm to obtain the preoperative full-length film planning result; the preoperative full-length film planning result is a two-dimensional image.

[0173] In one embodiment, the postoperative full-length radiograph simulation result is a two-dimensional image.

[0174] In one embodiment, the X-ray planarization algorithm is the DRR reconstruction algorithm.

[0175] In one embodiment, the prosthesis model information is determined based on the pixelation result of the prosthesis model.

[0176] The modules in the aforementioned simulation device for post-knee replacement surgery outcomes can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the computer device's memory as software, so that the processor can call and execute the corresponding operations of each module.

[0177] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 15 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database stores preoperative full-length imaging planning results data. The network interface communicates with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for simulating postoperative outcomes of knee replacement surgery.

[0178] Those skilled in the art will understand that Figure 15 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0179] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0180] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0181] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0182] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0183] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0184] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for simulating the outcome of knee replacement surgery, characterized in that, The method includes: Obtain the preoperative full-length radiograph planning results; the preoperative full-length radiograph planning results include the femur equipped with the first prosthesis component and the tibia equipped with the second prosthesis component; Based on the full-length radiograph planning results, the femur and tibia are corrected to the postoperative standard position, and a postoperative full-length radiograph simulation result is generated; wherein, the postoperative standard position refers to the position corresponding to the prosthesis reference plane of the tibia and the prosthesis reference plane of the femur under the knee joint space balance state. The step of correcting the femur and tibia to their postoperative standard positions and generating a full-length postoperative radiograph simulation result includes: Based on the adjustment data of the target gap, the femur and / or the tibia are adjusted to correct the femur and the tibia to the postoperative standard position, and the postoperative full-length simulation result is generated; the target gap is the gap between the first prosthesis component and the second prosthesis component under the knee joint gap balance state.

2. The method according to claim 1, characterized in that, After correcting the femur and tibia to their postoperative standard positions and generating a postoperative full-length simulation result, the method further includes: Based on the feature point recognition algorithm, the simulation results of the full-length postoperative film are identified and processed to determine the postoperative simulation force line and the first force line angle corresponding to the postoperative simulation force line. Based on the feature point recognition algorithm, the preoperative full-length film planning results are identified and processed to determine the preoperative actual force line and the second force line angle corresponding to the preoperative actual force line. By comparing and analyzing the first force line angle and the second force line angle, the comparison results of the first force line angle and the second force line angle are obtained.

3. The method according to claim 1, characterized in that, The target gap includes a first gap and a second gap; The first gap is determined by a first line connecting a first point on the first prosthesis assembly and a first point on the second prosthesis assembly; and the first line is parallel to the force line of the femur. The second gap is determined by a second line connecting a second point on the first prosthesis assembly and a second point on the second prosthesis assembly; and the second line is parallel to the force line of the femur.

4. The method according to claim 3, characterized in that, The first connecting line is a line passing through the medial condyle of the femur, or the first connecting line is a line passing through the first lowest point of the first prosthesis component; wherein, the first lowest point is a point on the surface of the first prosthesis component facing the second prosthesis component; The second line is either a line passing through the lateral condyle of the femur or a line passing through the second lowest point of the first prosthesis assembly; wherein the second lowest point is a point on the surface of the first prosthesis assembly facing the second prosthesis assembly.

5. The method according to any one of claims 3-4, characterized in that, The step of adjusting the femur and / or tibia according to the adjustment data of the target gap, correcting the femur and tibia to the postoperative standard position, and generating the postoperative full-length simulation result includes: Based on the gap distance value of the target gap, the adjustment data of the target gap is calculated; the adjustment data of the target gap includes the rotational translation of the femur and / or the rotational translation of the tibia; Based on the rotational translation of the femur and / or the rotational translation of the tibia, the femur and / or the tibia are adjusted to correct the femur and the tibia to the postoperative standard position; After correcting the femur and / or the tibia to the postoperative standard position, the rotation and translation amount of the image data is calculated based on the image data corresponding to the preoperative full-length radiograph planning result, and the postoperative full-length radiograph simulation result is generated based on the rotation and translation amount of the image data.

6. The method according to claim 1, characterized in that, The step of correcting the femur and tibia to their postoperative standard positions and generating a full-length postoperative radiograph simulation result includes: Based on the adjustment data of the target angle, the femur and / or the tibia are aligned and corrected to the postoperative standard position, and the postoperative full-length simulation result is generated; the target angle is the angle between the force line of the femur and the force line of the tibia before correction.

7. The method according to claim 6, characterized in that, The force line of the femur and the inversion / valgus angle of the femoral prosthesis are zero; The force line of the tibia and the inversion / exversion angle of the tibial prosthesis are zero.

8. The method according to claim 6 or 7, characterized in that, The steps of aligning the femur and / or tibia according to the adjustment data of the target angle, correcting the femur and tibia to the postoperative standard position, and generating the postoperative full-length simulation result include: Calculate the adjustment data for the target angle; the adjustment data for the target angle includes the angle value of the target angle; Based on the angle value of the target angle, the femur and / or the tibia are aligned and corrected to the postoperative standard position; After correcting the femur and tibia to the postoperative standard position, the rotation and translation of the image data are calculated based on the image data corresponding to the preoperative full-length radiograph planning result, and the postoperative full-length radiograph simulation result is generated based on the rotation and translation of the image data.

9. The method according to claim 1, characterized in that, The steps for obtaining the preoperative full-length radiograph planning results include: Obtain the prosthesis model information and CT image information corresponding to the pre-placed position; The prosthesis model information and the CT image information are fused to obtain the target fused image; Based on the X-ray flattening algorithm, the target fusion image is processed to obtain the preoperative full-length film planning result; wherein, the preoperative full-length film planning result is a two-dimensional image.

10. The method according to claim 1, characterized in that, The postoperative full-length radiograph simulation result is a two-dimensional image.

11. A simulation device for postoperative outcomes of knee replacement surgery, characterized in that, The device includes: The result acquisition module is used to acquire the preoperative full-length radiograph planning results; the preoperative full-length radiograph planning results include the femur equipped with the first prosthesis component and the tibia equipped with the second prosthesis component; The postoperative simulation module is used to correct the femur and tibia to the postoperative standard position according to the full-length radiograph planning results, and generate the postoperative full-length radiograph simulation results; wherein, the postoperative standard position refers to the position corresponding to the parallelism between the prosthesis osteotomy surface of the femur and the prosthesis osteotomy surface of the tibia. The postoperative simulation module includes: The target gap adjustment unit is used to adjust the femur and / or the tibia according to the target gap adjustment data, correct the femur and the tibia to the postoperative standard position, and generate the postoperative full-length simulation result; the target gap is the gap between the first prosthesis component and the second prosthesis component under the knee joint gap balance state.

12. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 10.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 10.

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