Method and device for determining the implantation position of a steel plate based on the distal end of the femur

Abstract

The present application discloses a method and device for determining the implantation position of a steel plate based on the distal end of the femur. The method relates to the fields of data processing technology, medical device technology and other related technical fields. The method includes: performing three-dimensional reconstruction based on the image data of the distal end of the femur of the target object to obtain a three-dimensional model 1 corresponding to the distal end of the femur of the target object; determining a preset implantation area of ​​the target implanted steel plate based on the three-dimensional model 1; within the preset implantation area, implanting each of a plurality of steel plates to be implanted into the three-dimensional model 1 to obtain a plurality of three-dimensional models 2; determining the target implanted steel plate from a plurality of steel plates to be implanted based on the three-dimensional model 1 and the plurality of three-dimensional models 2, and determining the implantation position corresponding to the target implanted steel plate as the target implantation position. Through the present application, the problem that the implantation position of the medial steel plate at the distal femoral fracture is determined based on artificial experience in the related art, resulting in a relatively low accuracy in the planning of the steel plate implantation, is solved.

Description

Technical Field

[0001] The present application relates to the fields of data processing technology, medical device technology and other related technical fields, and more specifically, to a method and device for determining a steel plate implantation position based on the distal end of a femur. Background Art

[0002] The incidence of distal femoral fractures is bimodal, with high-energy injuries in young people and low-energy injuries in the elderly. Its incidence accounts for 3-6% of femoral fractures, but the incidence of complications is as high as 15-20%. According to statistics, the mortality rate of distal femoral fractures in the elderly is similar to that of proximal femoral fractures (up to 30%), which has brought a heavy burden to public health. The double-plate internal fixation method for the treatment of distal femoral fractures solves some problems in treatment due to its excellent biomechanical characteristics, but during the treatment process, it usually relies on the experience of the therapist to fix the patient's fracture, and the therapist needs a lot of time to cold-bend the steel plate, resulting in poor fit between the steel plate and the patient's fracture, which can easily lead to problems such as lower limb deformity and internal fixation failure.

[0003] Currently, no effective solution has been proposed to address the problem that the implantation position of the medial steel plate at the distal femoral fracture is determined based on manual experience in related technologies, resulting in relatively low accuracy in the planning of steel plate implantation. Summary of the invention

[0004] The main purpose of the present application is to provide a method and device for determining the implantation position of a steel plate based on the distal end of the femur, so as to solve the problem in the related art that the implantation position of the medial steel plate at the distal femoral fracture is determined based on artificial experience, resulting in relatively low accuracy in the planning of the steel plate implantation.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a method for determining the implantation position of a steel plate based on the distal end of the femur is provided. The method comprises: performing three-dimensional reconstruction based on the image data of the distal end of the femur of the target object to obtain a three-dimensional model 1 corresponding to the distal end of the femur of the target object; determining a preset implantation area of ​​the target implanted steel plate based on the three-dimensional model 1; within the preset implantation area, implanting each of the multiple steel plates to be implanted into the three-dimensional model 1 to obtain multiple three-dimensional models 2, wherein each steel plate to be implanted corresponds to a different type of steel plate; determining the target implanted steel plate from the multiple steel plates to be implanted based on the three-dimensional model 1 and the multiple three-dimensional models 2, and determining the implantation position corresponding to the target implanted steel plate as the target implantation position.

[0006] Furthermore, based on the three-dimensional model one and the multiple three-dimensional models two, the target implant steel plate is determined from the multiple steel plates to be implanted, and the implantation position corresponding to the target implant steel plate is determined as the target implantation position, including: based on the three-dimensional model one, the fracture morphology corresponding to the target object is determined; based on the fracture morphology, a distance calculation rule is determined between the steel plate to be implanted in each three-dimensional model two and the distal end of the femur of the target object; the distance between the steel plate to be implanted in each three-dimensional model two and the target position in the distal end of the femur is calculated by the distance calculation rule to obtain multiple distance values, wherein the multiple distance values ​​are used to characterize the degree of fit between the multiple steel plates to be implanted and the distal end of the femur of the target object; based on the multiple distance values, the target implant steel plate is determined from the multiple steel plates to be implanted, and the implantation position corresponding to the target implant steel plate is determined as the target implantation position.

[0007] Further, based on the multiple distance values, the target implant steel plate is determined from the multiple steel plates to be implanted, and the implantation position corresponding to the target implant steel plate is determined as the target implantation position, including: based on the multiple distance values, an initial implant steel plate and a three-dimensional model 2 corresponding to the initial implant steel plate are determined from the multiple steel plates to be implanted; performing finite element analysis on the three-dimensional model 2 corresponding to the initial implant steel plate to obtain a target analysis result; judging whether the target analysis result meets a preset condition to obtain a judgment result; if the judgment result indicates that the target analysis result meets the preset condition, the initial implant steel plate is determined as the target implant steel plate, and the implantation position corresponding to the target implant steel plate is determined as the target implantation position.

[0008] Furthermore, a finite element analysis is performed on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a target analysis result, including: an axial compression analysis is performed on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a first analysis result; a torsional analysis is performed on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a second analysis result; and the target analysis result is determined based on the first analysis result and the second analysis result.

[0009] Furthermore, an axial compression analysis is performed on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a first analysis result, including: calculating according to the weight of the target object to obtain a target load value corresponding to the target object; performing the axial compression analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate according to the target load value to obtain a first parameter, wherein the first parameter at least includes: the axial displacement of the distal femur of the target object, the maximum displacement of the femur and the first equivalent stress value corresponding to the initial implanted steel plate; calculating according to the target load value and the maximum displacement of the femur to obtain the axial stiffness corresponding to the three-dimensional model 2 corresponding to the initial implanted steel plate; determining the first analysis result based on the axial stiffness and the first parameter.

[0010] Furthermore, a torsion analysis is performed on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a second analysis result, including: calculating according to the weight of the target object to obtain a target femoral torsion moment corresponding to the target object; performing the torsion analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate according to the target femoral torsion moment to obtain a second parameter, wherein the second parameter at least includes: the maximum femoral torsion angle of the distal femur of the target object, the maximum femoral torsion displacement and the second equivalent stress value corresponding to the initial implanted steel plate; calculating according to the femoral torsion moment and the maximum femoral torsion angle to obtain the axial rotational stiffness corresponding to the three-dimensional model 2 corresponding to the initial implanted steel plate; determining the second analysis result according to the axial rotational stiffness and the second parameter.

[0011] Furthermore, three-dimensional reconstruction is performed based on the image data of the distal femur of the target object to obtain a three-dimensional model corresponding to the distal femur of the target object, including: three-dimensional reconstruction is performed based on the image data to obtain an initial three-dimensional model corresponding to the distal femur of the target object; the initial three-dimensional model is optimized to obtain an optimized initial three-dimensional model; and the optimized initial three-dimensional model is meshed to obtain the three-dimensional model.

[0012] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a device for determining the implantation position of a steel plate based on the distal end of the femur is provided. The device includes: a reconstruction unit, which is used to perform three-dimensional reconstruction based on the image data of the distal end of the femur of the target object, and obtain a three-dimensional model 1 corresponding to the distal end of the femur of the target object; a first determination unit, which is used to determine the preset implantation area of ​​the target implanted steel plate based on the three-dimensional model 1; an implantation unit, which is used to implant each of the multiple steel plates to be implanted into the three-dimensional model 1 within the preset implantation area, and obtain multiple three-dimensional models 2, wherein each steel plate to be implanted corresponds to a different type of steel plate; a second determination unit, which is used to determine the target implanted steel plate from the multiple steel plates to be implanted based on the three-dimensional model 1 and the multiple three-dimensional models 2, and determine the implantation position corresponding to the target implanted steel plate as the target implantation position.

[0013] Furthermore, the second determination unit includes: a first determination subunit, used to determine the fracture morphology corresponding to the target object based on the three-dimensional model one; a second determination subunit, used to determine the distance calculation rule between the steel plate to be implanted in each three-dimensional model two and the distal end of the femur of the target object based on the fracture morphology; a calculation subunit, used to calculate the distance between the steel plate to be implanted in each three-dimensional model two and the target position in the distal end of the femur according to the distance calculation rule, and obtain multiple distance values, wherein the multiple distance values ​​are used to characterize the degree of fit between the multiple steel plates to be implanted and the distal end of the femur of the target object; a third determination subunit, used to determine the target implant steel plate from the multiple steel plates to be implanted based on the multiple distance values, and determine the implantation position corresponding to the target implant steel plate as the target implantation position.

[0014] Furthermore, the third determination subunit includes: a first determination module, used to determine the initial implanted steel plate and the three-dimensional model 2 corresponding to the initial implanted steel plate from the multiple steel plates to be implanted based on the multiple distance values; an analysis module, used to perform finite element analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a target analysis result; a judgment module, used to judge whether the target analysis result meets a preset condition and obtain a judgment result; a second determination module, used to determine the initial implanted steel plate as the target implanted steel plate if the judgment result indicates that the target analysis result meets the preset condition, and determine the implantation position corresponding to the target implanted steel plate as the target implantation position.

[0015] Furthermore, the analysis module includes: a first analysis submodule, used to perform axial compression analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a first analysis result; a second analysis submodule, used to perform torsional analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a second analysis result; and a determination submodule, used to determine the target analysis result based on the first analysis result and the second analysis result.

[0016] Furthermore, the first analysis submodule includes: a first calculation submodule, which is used to calculate according to the weight of the target object to obtain the target load value corresponding to the target object; a first analysis submodule, which is used to perform the axial compression analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate according to the target load value to obtain the first parameter, wherein the first parameter at least includes: the axial displacement of the distal femur of the target object, the maximum displacement of the femur and the first equivalent stress value corresponding to the initial implanted steel plate; a second calculation submodule, which is used to calculate according to the target load value and the maximum displacement of the femur to obtain the axial stiffness corresponding to the three-dimensional model 2 corresponding to the initial implanted steel plate; a first determination submodule, which is used to determine the first analysis result based on the axial stiffness and the first parameter.

[0017] Furthermore, the second analysis submodule includes: a third calculation submodule, which is used to calculate according to the weight of the target object to obtain the target femoral torsional moment corresponding to the target object; a second analysis submodule, which is used to perform the torsional analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate according to the target femoral torsional moment to obtain the second parameter, wherein the second parameter at least includes: the maximum femoral torsional angle of the distal femur of the target object, the maximum femoral torsional displacement and the second equivalent stress value corresponding to the initial implanted steel plate; a fourth calculation submodule, which is used to calculate according to the femoral torsional moment and the maximum femoral torsional angle to obtain the axial rotational stiffness corresponding to the three-dimensional model 2 corresponding to the initial implanted steel plate; and a second determination submodule, which is used to determine the second analysis result according to the axial rotational stiffness and the second parameter.

[0018] Furthermore, the reconstruction unit includes: a reconstruction subunit, which is used to perform three-dimensional reconstruction based on the image data to obtain an initial three-dimensional model one corresponding to the distal end of the femur of the target object; an optimization subunit, which is used to optimize the initial three-dimensional model one to obtain an optimized initial three-dimensional model one; and a division subunit, which is used to grid the optimized initial three-dimensional model one to obtain the three-dimensional model one.

[0019] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a computer-readable storage medium is provided, wherein the storage medium stores a program, wherein when the program is running, the device where the storage medium is located is controlled to execute any one of the above-mentioned methods for determining the steel plate implantation position based on the distal end of the femur.

[0020] In order to achieve the above-mentioned purpose, according to another aspect of the present application, an electronic device is also provided, the electronic device includes one or more processors and a memory, and the memory is used to store the method for determining the steel plate implantation position based on the distal end of the femur implemented by one or more processors.

[0021] Through this application, the following steps are adopted: three-dimensional reconstruction is performed based on the image data of the distal femur of the target object to obtain a three-dimensional model 1 corresponding to the distal femur of the target object; based on the three-dimensional model 1, the preset implantation area of ​​the target implant plate is determined; in the preset implantation area, each of the multiple implanted steel plates is implanted into the three-dimensional model 1 to obtain multiple three-dimensional models 2, wherein each implanted steel plate corresponds to a different type of steel plate; based on the three-dimensional model 1 and the multiple three-dimensional models 2, the target implanted steel plate is determined from the multiple implanted steel plates, and the implantation position corresponding to the target implanted steel plate is determined as the target implantation position. Through this application, the problem of low accuracy in the planning of steel plate implantation caused by determining the implantation position of the medial steel plate at the distal femoral fracture based on artificial experience in the related art is solved. In this scheme, reverse modeling is performed based on the image data of the distal femur of the target object to obtain a three-dimensional model 1 of the distal femur. The preset implantation area of ​​the target implanted steel plate is determined based on the three-dimensional model 1. In the preset implantation area, multiple steel plates of different types to be implanted are respectively implanted into the three-dimensional model one to obtain multiple three-dimensional models two, and the target implanted steel plates and their corresponding target implantation positions are comprehensively determined based on the multiple three-dimensional models two. By means of three-dimensional reconstruction and simulation of the imaging data of the distal femur, the anatomical structure information of the target object can be obtained more realistically, thereby better simulating the implantation of the steel plate. At the same time, by comparing and selecting between multiple implantation positions and steel plate types, the most suitable implantation position and steel plate type can be determined, reducing the interference of human factors and avoiding the generation of subjective errors, thereby improving the success rate and effect of steel plate implantation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 It is a flow chart of a method for determining a steel plate implantation position based on the distal end of the femur provided in an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of multiple three-dimensional models 2 provided according to an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of axial compression analysis provided according to an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of axial displacement provided according to an embodiment of the present application;

[0027] Figure 5 is a schematic diagram of a torsion analysis provided according to an embodiment of the present application;

[0028] Figure 6 is a schematic diagram of torsional displacement provided according to an embodiment of the present application;

[0029] Figure 7 is a schematic diagram of grid division provided according to an embodiment of the present application;

[0030] Figure 8 is a schematic diagram of a device for determining a steel plate implantation position based on the distal end of a femur according to an embodiment of the present application;

[0031] Fig. 9 is a schematic diagram of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] It should be noted that the relevant information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for display, data for analysis, etc.) involved in this disclosure are all information and data authorized by the user or fully authorized by all parties. For example, an interface is set up between this system and the relevant users or organizations. Before obtaining relevant information, it is necessary to send an acquisition request to the aforementioned user or organization through the interface, and obtain relevant information after receiving the consent information fed back by the aforementioned user or organization.

[0036] The present invention is described below in conjunction with preferred implementation steps. Figure 1 is a flow chart of a method for determining a steel plate implantation position based on the distal end of the femur according to an embodiment of the present application, such as Figure 1 As shown, the method comprises the following steps:

[0037] Step S101, performing three-dimensional reconstruction based on image data of the distal femur of the target object to obtain a three-dimensional model 1 corresponding to the distal femur of the target object.

[0038] Optionally, a DICOM dataset of the distal femur of the patient (ie, the target object) is acquired through imaging techniques such as high-precision computed tomography (CT), and reverse modeling is performed on it, and a high-precision three-dimensional bone model (ie, three-dimensional model one) corresponding to the distal femur of the patient is generated using a computer.

[0039] It should be noted that if the reverse modeled bone block is not complete enough and is determined by clinical experts to be unhealable, it will be removed and the size of the bone defect formed will be measured.

[0040] Step S102, determining a preset implantation area of ​​a target implantation plate based on the three-dimensional model 1.

[0041] Optionally, reduction is performed on a high-precision three-dimensional model after the fracture, and biomechanical simulation technology is introduced to simulate the patient's intraoperative techniques and paths to ensure the closure of the patient's fracture line. At the same time, the fracture stability and functional requirements under different postoperative load conditions are considered to comprehensively determine the preset implantation area of ​​the steel plate.

[0042] It should be noted that the preset implantation area is mainly limited by the condyle of the steel plate. Combined with the morphological and structural characteristics of the alternative steel plate and the preset screw arrangement orientation, the lower boundary is limited to the patellar trochlear notch plane, the upper boundary is the upper edge of the medial condyle, the front boundary is the anatomical axis of the bone trunk, and the rear boundary is the posterior extension of the medial condyle. In this area, the steel plate can be implanted by certain rotation, tilting, etc.

[0043] Step S103, within the preset implantation area, implant each of the multiple steel plates to be implanted into the three-dimensional model one to obtain multiple three-dimensional models two, wherein each steel plate to be implanted corresponds to a different steel plate type.

[0044] Optionally, Figure 2 is a schematic diagram of multiple three-dimensional models 2 provided according to an embodiment of the present application, such as Figure 2 As shown, the three-dimensional models of each steel plate to be implanted are respectively imported into the preset implantation area, and each steel plate to be implanted is respectively implanted into the three-dimensional model one of the distal femur of the patient, to obtain a plurality of three-dimensional models two of different types.

[0045] It should be noted that the multiple steel plates to be implanted include but are not limited to: a distal medial femoral support plate, a distal medial femoral compression locking plate, a distal medial femoral locking plate and a distal medial femoral plate.

[0046] Step S104, based on the three-dimensional model one and the multiple three-dimensional models two, determine the target implant steel plate from the multiple steel plates to be implanted, and determine the implantation position corresponding to the target implant steel plate as the target implantation position.

[0047] Optionally, the fit of multiple three-dimensional models is verified, and suitable medial support plates are selected based on the fracture morphology and pre-reduction conditions. The mechanical effects of the selected medial support plates are evaluated, and the optimal medial support plate is selected as the target implantation plate, and the implantation position corresponding to the optimal medial support plate is determined as the target implantation position.

[0048] In summary, reverse modeling is performed based on the image data of the distal femur of the target object to obtain a three-dimensional model 1 of the distal femur. The preset implantation area of ​​the target implant plate is determined based on the three-dimensional model 1. In the preset implantation area, multiple steel plates of different types to be implanted are respectively implanted into the three-dimensional model 1 to obtain multiple three-dimensional models 2. According to the multiple three-dimensional models 2, the target implant plate and its corresponding target implantation position are comprehensively determined. By three-dimensionally reconstructing and simulating the image data of the distal femur, the anatomical structure information of the target object can be obtained more realistically, thereby better simulating the implantation of the steel plate. At the same time, by comparing and selecting between multiple implantation positions and steel plate types, the most suitable implantation position and steel plate type can be determined, which reduces the interference of human factors and avoids the generation of subjective errors, thereby improving the success rate and effect of steel plate implantation.

[0049] Optionally, in the method for determining the implantation position of a steel plate based on the distal end of the femur provided in an embodiment of the present application, a target implantation steel plate is determined from multiple steel plates to be implanted based on three-dimensional model one and multiple three-dimensional models two, and the implantation position corresponding to the target implantation steel plate is determined as the target implantation position, including: determining the fracture morphology corresponding to the target object based on the three-dimensional model one; determining the distance calculation rule between the steel plate to be implanted in each three-dimensional model two and the distal end of the femur of the target object based on the fracture morphology; calculating the distance between the steel plate to be implanted in each three-dimensional model two and the target position in the distal end of the femur according to the distance calculation rule to obtain multiple distance values, wherein the multiple distance values ​​are used to characterize the degree of fit between the multiple steel plates to be implanted and the distal end of the femur of the target object; determining the target implantation steel plate from multiple steel plates to be implanted based on the multiple distance values, and determining the implantation position corresponding to the target implantation steel plate as the target implantation position.

[0050] In an optional embodiment, the patient's corresponding fracture morphology is determined by using a high-precision three-dimensional bone model corresponding to the patient's distal femur. In combination with different fracture morphologies and the need for plate internal fixation, three distance calculation rules can be determined, including: condyle priority, stem priority, and comprehensive judgment. Condyle priority is applicable to fractures with short plates and severe condylar damage, and priority is given to finding the shortest distance between the condyle of the plate and the femoral condyle; stem priority is applicable to fractures with long plates and severe distal femoral stem damage, and priority is given to finding the shortest distance between the stem of the plate and the distal femoral stem; comprehensive judgment is applicable to fractures with both condyle and stem damage, and the shortest distance from the entire plate to the distal femur is found. The above distance calculation rules are used to calculate the comprehensive distance between the target position in the steel plate and the distal femur to obtain multiple distance values.

[0051] It should be noted that the position with the shortest comprehensive distance is the optimal placement position for the steel plate.

[0052] By screening the appropriate internal fixation system based on fit, the time spent on cold bending of the steel plate during surgery can be minimized, thereby reducing the risk of implantation.

[0053] Optionally, in the method for determining the implantation position of a steel plate based on the distal end of the femur provided in an embodiment of the present application, a target implant steel plate is determined from a plurality of steel plates to be implanted based on a plurality of distance values, and the implantation position corresponding to the target implant steel plate is determined as the target implantation position, including: determining an initial implant steel plate and a three-dimensional model 2 corresponding to the initial implant steel plate from a plurality of steel plates to be implanted based on a plurality of distance values; performing finite element analysis on the three-dimensional model 2 corresponding to the initial implant steel plate to obtain a target analysis result; judging whether the target analysis result meets a preset condition to obtain a judgment result; if the judgment result indicates that the target analysis result meets the preset condition, the initial implant steel plate is determined as the target implant steel plate, and the implantation position corresponding to the target implant steel plate is determined as the target implant position.

[0054] In an optional embodiment, among multiple steel plates to be implanted, the steel plate with the smallest distance value between the steel plate to be implanted and the distal end of the femur of the target object is selected as the initial implant steel plate. Finite element analysis is performed on the three-dimensional model 2 corresponding to the initial implant steel plate, and the normal physiological movements of the human body are simulated through axial compression analysis and torsion analysis to extract the relevant parameters corresponding to the three-dimensional model 2 (i.e., the target analysis results). It is judged whether the target analysis results meet the preset conditions, such as: requirements in terms of bearing capacity, stability, etc. If the target analysis results meet the preset conditions, the initial implant steel plate is determined as the target implant steel plate, and the implantation position corresponding to the target implant steel plate is determined as the target implantation position, that is, the specific position and direction of the implantation are determined. If the target analysis results do not meet the preset conditions, the steel plate with the smallest distance value is selected from the remaining steel plates to be implanted as the current initial implant steel plate, and a finite element analysis is performed on it. If the target analysis results corresponding to all the steel plates to be implanted do not meet the preset conditions, the preset implantation area is readjusted.

[0055] It should be noted that the preset conditions are constraints on axial stiffness, axial rotation stiffness, micro-displacement and maximum equivalent stress of the lateral plate. For axial stiffness and axial rotation stiffness, it is necessary to avoid deformity and non-union caused by insufficient stiffness, and also to avoid stress barriers formed by excessive strength of the internal fixation system. Therefore, the axial stiffness should be 50-400N / mm, and the appropriate range of torsional stiffness is 5-25N / deg. For micro-displacement, the axial movement between the fracture fragments is mostly a positive stimulus to fracture healing, while the shear displacement is mostly an inhibitory effect, and the limited range of torsional displacement is more stringent. Therefore, the limited ranges of axial displacement and torsional displacement are: 0.1-3mm, 0-1.5mm, respectively. For the maximum equivalent stress of the lateral plate, different loading conditions cannot exceed the yield strength of the material, so the limited ranges of the maximum equivalent stress of the lateral plate under axial loading and the maximum equivalent stress of the lateral plate under torsional loading are: 0-1014MPa, 0-455MPa, respectively.

[0056] Through the above steps, the target implantation steel plate and its corresponding target implantation position can be determined based on multiple distance values ​​to ensure the stability and safety of the implantation steel plate, thereby achieving an effective implantation process.

[0057] Optionally, in the method for determining the implantation position of a steel plate based on the distal end of the femur provided in an embodiment of the present application, a finite element analysis is performed on the three-dimensional model two corresponding to the initial implanted steel plate to obtain a target analysis result including: performing an axial compression analysis on the three-dimensional model two corresponding to the initial implanted steel plate to obtain a first analysis result; performing a torsional analysis on the three-dimensional model two corresponding to the initial implanted steel plate to obtain a second analysis result; and determining the target analysis result based on the first analysis result and the second analysis result.

[0058] In an optional embodiment, load three-dimensional model 2 in finite element software, set axial compression loading conditions, and run finite element analysis to obtain stress and strain distribution under axial compression loading. Analyze the deformation of the steel plate under axial compression loading according to the results to obtain the first analysis result. Reload three-dimensional model 2 in the finite element software, set torsional loading conditions, and run finite element analysis to obtain stress and strain distribution under torsional loading. Analyze the deformation of the steel plate under torsional loading according to the results to obtain the second analysis result. Comprehensively considering the analysis results under the two loading conditions of axial compression and torsion, the stress conditions of the steel plate under different loading conditions can be obtained to obtain the target analysis results.

[0059] Through the above steps, finite element analysis can be performed on the three-dimensional model 2 corresponding to the initial implanted steel plate, and the target analysis results can be obtained to guide the implantation process of the steel plate to be implanted.

[0060] Optionally, in the method for determining the implantation position of a steel plate based on the distal end of the femur provided in an embodiment of the present application, an axial compression analysis is performed on the three-dimensional model 2 corresponding to the initially implanted steel plate to obtain a first analysis result including: calculating based on the weight of the target object to obtain a target load value corresponding to the target object; performing an axial compression analysis on the three-dimensional model 2 corresponding to the initially implanted steel plate based on the target load value to obtain a first parameter, wherein the first parameter includes at least: the axial displacement of the distal end of the femur of the target object, the maximum displacement of the femur and the first equivalent stress value corresponding to the initially implanted steel plate; calculating based on the target load value and the maximum displacement of the femur to obtain the axial stiffness corresponding to the three-dimensional model 2 corresponding to the initially implanted steel plate; determining the first analysis result based on the axial stiffness and the first parameter.

[0061] In an optional embodiment, Figure 3 Schematic diagram of axial compression analysis provided according to an embodiment of the present application. Figure 3 As shown in the figure, to simulate the force of an adult standing, all nodes on the distal femur surface are constrained to 0 degrees of freedom, while the proximal femur is not restricted to simulate the physiological state of the human body to the greatest extent. A 100% downward load (i.e., target load value) is introduced at the center of the femoral head. The load direction is at an angle of 8° to the axis of the femoral shaft in the sagittal plane and 13° to the axis of the femoral shaft in the coronal plane. An axial compression analysis is performed to obtain the first parameter. Figure 4 Schematic diagram of axial displacement according to an embodiment of the present application. Figure 4 As shown in the figure, the first parameter includes: the axial displacement of the fracture defect (among the three distance values ​​of AA', BB' and CC', the distance value between AA' is taken as the axial displacement of the fracture defect), the maximum displacement of the femur, and the equivalent stress of the medial and lateral steel plates (i.e., the first equivalent stress value). The axial stiffness (N / mm) of the internal fixation system can be calculated by the ratio of the load and the maximum displacement of the femur.

[0062] By performing axial compression analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate, the first analysis result can be obtained quickly and accurately.

[0063] Optionally, in the method for determining the implantation position of a steel plate based on the distal end of the femur provided in an embodiment of the present application, a torsion analysis is performed on the three-dimensional model two corresponding to the initially implanted steel plate, and a second analysis result is obtained, including: calculating based on the weight of the target object to obtain a target femoral torsion moment corresponding to the target object; performing a torsion analysis on the three-dimensional model two corresponding to the initially implanted steel plate based on the target femoral torsion moment to obtain a second parameter, wherein the second parameter includes at least: the maximum femoral torsion angle, the maximum femoral torsion displacement and the second equivalent stress value corresponding to the initially implanted steel plate at the distal end of the femur of the target object; calculating based on the femoral torsion moment and the maximum femoral torsion angle to obtain the axial rotational stiffness corresponding to the three-dimensional model two corresponding to the initially implanted steel plate; determining the second analysis result based on the axial rotational stiffness and the second parameter.

[0064] In an optional embodiment, Figure 5 Schematic diagram of torsion analysis according to an embodiment of the present application. Figure 5 As shown in the figure, the femoral torsion moment (i.e., the target femoral torsion moment) of a human body when walking is about 1.5-2.0%×body weight (Nm). The force is applied to the femoral head, and the direction is clockwise torsion in the horizontal plane. The second parameter is obtained by performing torsion analysis on it. Figure 6 Schematic diagram of torsional displacement according to an embodiment of the present application. Figure 6 As shown in the figure, the second parameters include: the maximum torsion angle of the femoral head, the torsion displacement at the fracture defect (after torsion analysis, there are torsion angle value M and torsion arc value N, and the torsion arc value N is used as the torsion displacement at the fracture defect), the equivalent stress of the medial and lateral steel plates (i.e., the second equivalent stress value), and the torsional stiffness (Nm / deg) of the internal fixation model can be calculated by the ratio of the torsional moment and the maximum torsion angle of the femoral head.

[0065] By performing a torsion analysis on the three-dimensional model 2 corresponding to the initially implanted steel plate, a second analysis result can be obtained quickly and accurately.

[0066] Optionally, in the method for determining the implantation position of a steel plate based on the distal end of the femur provided in an embodiment of the present application, three-dimensional reconstruction is performed based on image data of the distal end of the femur of the target object to obtain a three-dimensional model corresponding to the distal end of the femur of the target object, including: performing three-dimensional reconstruction based on the image data to obtain an initial three-dimensional model corresponding to the distal end of the femur of the target object; optimizing the initial three-dimensional model to obtain an optimized initial three-dimensional model; and meshing the optimized initial three-dimensional model to obtain a three-dimensional model.

[0067] In an optional embodiment, a DICOM data set (i.e., image data) of a patient's fractured limb is obtained from a medical imaging device (mainly a CT scan), and the healthy limb may be scanned to reconstruct a contrast reduction if necessary. The DICOM data contains the patient's bone section image information. The DICOM data is preprocessed, including but not limited to: noise removal, image calibration, and slice reconstruction, etc., to ensure that high-quality image data is obtained. The DICOM slices are stacked using a three-dimensional reconstruction algorithm to generate a three-dimensional model of the patient's bones (i.e., the initial three-dimensional model one). The bones are segmented in the three-dimensional model to separate the bones to be used from other bones. Bone segmentation can be achieved using manual segmentation or automatic segmentation algorithms. The segmented bone model is repaired and post-processed, and the optimization operations include but are not limited to: filling holes, smoothing surfaces, removing abnormal structures, etc., to obtain an optimized initial three-dimensional model one. The optimized initial three-dimensional model one is imported into the software, and the six components of the fixed model (cortical bone, cancellous bone, internal fixation plate, and screws) are meshed using tetrahedron solid187 units to obtain a three-dimensional model one.

[0068] It should be noted that Figure 7 Schematic diagram of grid division according to an embodiment of the present application. Figure 7 As shown in the figure, when conducting the mesh convergence test, five groups of meshes were divided, namely 0.5mm, 1mm, 2mm, 3mm and 5mm. Finally, in the case of 1mm mesh and 0.5mm mesh, the stress difference of the femoral plate is less than 5%, which meets the convergence standard. Combined with the calculation efficiency and cost, the mesh size was finally determined to be 1mm.

[0069] It should be noted that commonly used three-dimensional reconstruction algorithms include, but are not limited to, voxel reconstruction algorithms and surface reconstruction algorithms, etc. These algorithms can convert slice images into continuous three-dimensional bone surfaces or voxel representations.

[0070] 3D reconstruction through image data can accurately restore the distal femur structure of the target object, avoiding the limitations of traditional 2D images and making the reconstructed 3D model more realistic and accurate. At the same time, by meshing the optimized 3D model, the model can be divided into smaller units, which is helpful for subsequent simulation and analysis.

[0071] The method for determining the implantation position of a steel plate based on the distal end of the femur provided in the embodiment of the present application performs three-dimensional reconstruction based on the image data of the distal end of the femur of the target object to obtain a three-dimensional model 1 corresponding to the distal end of the femur of the target object; based on the three-dimensional model 1, determine the preset implantation area of ​​the target implanted steel plate; within the preset implantation area, implant each of the multiple steel plates to be implanted into the three-dimensional model 1 respectively to obtain multiple three-dimensional models 2, wherein each steel plate to be implanted corresponds to a different type of steel plate; based on the three-dimensional model 1 and the multiple three-dimensional models 2, determine the target implanted steel plate from the multiple steel plates to be implanted, and determine the implantation position corresponding to the target implanted steel plate as the target implantation position, which solves the problem in the related art that the implantation position of the medial steel plate at the distal femoral fracture is determined based on artificial experience, resulting in a relatively low accuracy of the planning of steel plate implantation. In summary, in this scheme, reverse modeling is performed based on the image data of the distal end of the femur of the target object to obtain a three-dimensional model 1 of the distal end of the femur. Determine the preset implantation area of ​​the target implanted steel plate based on the three-dimensional model 1. In the preset implantation area, multiple steel plates of different types to be implanted are respectively implanted into the three-dimensional model one to obtain multiple three-dimensional models two, and the target implanted steel plates and their corresponding target implantation positions are comprehensively determined based on the multiple three-dimensional models two. By means of three-dimensional reconstruction and simulation of the imaging data of the distal femur, the anatomical structure information of the target object can be obtained more realistically, thereby better simulating the implantation of the steel plate. At the same time, by comparing and selecting between multiple implantation positions and steel plate types, the most suitable implantation position and steel plate type can be determined, reducing the interference of human factors and avoiding the generation of subjective errors, thereby improving the success rate and effect of steel plate implantation.

[0072] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0073] The embodiment of the present application also provides a device for determining the implantation position of a steel plate based on the distal end of the femur. It should be noted that the device for determining the implantation position of a steel plate based on the distal end of the femur in the embodiment of the present application can be used to execute the method for determining the implantation position of a steel plate based on the distal end of the femur provided in the embodiment of the present application. The device for determining the implantation position of a steel plate based on the distal end of the femur provided in the embodiment of the present application is introduced below.

[0074] Figure 8 Schematic diagram of a device for determining the implantation position of a steel plate based on the distal end of the femur according to an embodiment of the present application. Figure 8 As shown, the device includes: a reconstruction unit 801, a first determination unit 802, an implantation unit 803, and a second determination unit 804.

[0075] A reconstruction unit 801 is used to perform three-dimensional reconstruction based on the image data of the distal femur of the target object to obtain a three-dimensional model 1 corresponding to the distal femur of the target object;

[0076] The first determining unit 802 is used to determine a preset implantation area of ​​the target implanted steel plate according to the three-dimensional model 1;

[0077] The implantation unit 803 is used to implant each of the multiple steel plates to be implanted into the three-dimensional model 1 in a preset implantation area to obtain multiple three-dimensional models 2, wherein each steel plate to be implanted corresponds to a different steel plate type;

[0078] The second determination unit 804 is used to determine a target implant steel plate from multiple steel plates to be implanted based on the three-dimensional model one and multiple three-dimensional models two, and determine the implantation position corresponding to the target implant steel plate as the target implantation position.

[0079] The embodiment of the present application provides a device for determining the implantation position of a steel plate based on the distal end of the femur. The reconstruction unit 801 performs three-dimensional reconstruction based on the image data of the distal end of the femur of the target object to obtain a three-dimensional model 1 corresponding to the distal end of the femur of the target object; the first determination unit 802 determines the preset implantation area of ​​the target implanted steel plate based on the three-dimensional model 1; the implantation unit 803 implants each of the multiple steel plates to be implanted into the three-dimensional model 1 in the preset implantation area to obtain multiple three-dimensional models 2, wherein each steel plate to be implanted corresponds to a different type of steel plate; the second determination unit 804 determines the target implanted steel plate from the multiple steel plates to be implanted based on the three-dimensional model 1 and the multiple three-dimensional models 2, and determines the implantation position corresponding to the target implanted steel plate as the target implantation position, which solves the problem in the related art that the implantation position of the medial steel plate at the distal femoral fracture is determined based on artificial experience, resulting in a relatively low accuracy of the planning of steel plate implantation. In this solution, reverse modeling is performed based on the image data of the distal end of the femur of the target object to obtain a three-dimensional model 1 of the distal end of the femur. The preset implantation area of ​​the target implanted steel plate is determined based on the three-dimensional model 1. In the preset implantation area, multiple steel plates of different types to be implanted are respectively implanted into the three-dimensional model one to obtain multiple three-dimensional models two, and the target implanted steel plates and their corresponding target implantation positions are comprehensively determined based on the multiple three-dimensional models two. By means of three-dimensional reconstruction and simulation of the imaging data of the distal femur, the anatomical structure information of the target object can be obtained more realistically, thereby better simulating the implantation of the steel plate. At the same time, by comparing and selecting between multiple implantation positions and steel plate types, the most suitable implantation position and steel plate type can be determined, reducing the interference of human factors and avoiding the generation of subjective errors, thereby improving the success rate and effect of steel plate implantation.

[0080] Optionally, in the device for determining the implantation position of a steel plate based on the distal end of the femur provided in an embodiment of the present application, the second determination unit includes: a first determination subunit, for determining the fracture morphology corresponding to the target object based on the three-dimensional model one; a second determination subunit, for determining a distance calculation rule between the steel plate to be implanted in each three-dimensional model two and the distal end of the femur of the target object based on the fracture morphology; a calculation subunit, for calculating the distance between the steel plate to be implanted in each three-dimensional model two and the target position in the distal end of the femur through the distance calculation rule to obtain multiple distance values, wherein the multiple distance values ​​are used to characterize the degree of fit between the multiple steel plates to be implanted and the distal end of the femur of the target object; a third determination subunit, for determining a target implantation steel plate from multiple steel plates to be implanted based on the multiple distance values, and determining the implantation position corresponding to the target implantation steel plate as the target implantation position.

[0081] Optionally, in the device for determining the implantation position of a steel plate based on the distal end of the femur provided in an embodiment of the present application, the third determination subunit includes: a first determination module, used to determine an initial implanted steel plate and a three-dimensional model 2 corresponding to the initial implanted steel plate from a plurality of steel plates to be implanted based on multiple distance values; an analysis module, used to perform finite element analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a target analysis result; a judgment module, used to judge whether the target analysis result meets a preset condition to obtain a judgment result; and a second determination module, used to determine the initial implanted steel plate as the target implanted steel plate and determine the implantation position corresponding to the target implanted steel plate as the target implant position if the judgment result indicates that the target analysis result meets the preset condition.

[0082] Optionally, in the device for determining the implantation position of a steel plate based on the distal end of the femur provided in an embodiment of the present application, the analysis module includes: a first analysis submodule, used to perform axial compression analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a first analysis result; a second analysis submodule, used to perform torsional analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a second analysis result; and a determination submodule, used to determine a target analysis result based on the first analysis result and the second analysis result.

[0083] Optionally, in the device for determining the implantation position of a steel plate based on the distal end of the femur provided in an embodiment of the present application, a first analysis submodule includes: a first calculation submodule, for calculating based on the weight of a target object to obtain a target load value corresponding to the target object; a first analysis submodule, for performing an axial compression analysis on three-dimensional model 2 corresponding to the initial implanted steel plate based on the target load value to obtain a first parameter, wherein the first parameter includes at least: the axial displacement of the distal end of the femur of the target object, the maximum displacement of the femur and the first equivalent stress value corresponding to the initial implanted steel plate; a second calculation submodule, for calculating based on the target load value and the maximum displacement of the femur to obtain the axial stiffness corresponding to three-dimensional model 2 corresponding to the initial implanted steel plate; and a first determination submodule, for determining a first analysis result based on the axial stiffness and the first parameter.

[0084] Optionally, in the device for determining the implantation position of a steel plate based on the distal end of the femur provided in an embodiment of the present application, the second analysis submodule includes: a third calculation submodule, for calculating based on the weight of a target object to obtain a target femoral torsional moment corresponding to the target object; a second analysis submodule, for performing a torsional analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate based on the target femoral torsional moment to obtain a second parameter, wherein the second parameter includes at least: the maximum femoral torsional angle, the maximum femoral torsional displacement and the second equivalent stress value corresponding to the initial implanted steel plate at the distal end of the femur of the target object; a fourth calculation submodule, for calculating based on the femoral torsional moment and the maximum femoral torsional angle to obtain the axial rotational stiffness corresponding to the three-dimensional model 2 corresponding to the initial implanted steel plate; and a second determination submodule, for determining a second analysis result based on the axial rotational stiffness and the second parameter.

[0085] Optionally, in the device for determining the steel plate implantation position based on the distal end of the femur provided in an embodiment of the present application, the reconstruction unit includes: a reconstruction subunit, used to perform three-dimensional reconstruction based on image data to obtain an initial three-dimensional model one corresponding to the distal end of the femur of the target object; an optimization subunit, used to optimize the initial three-dimensional model one to obtain an optimized initial three-dimensional model one; and a division subunit, used to grid the optimized initial three-dimensional model one to obtain a three-dimensional model one.

[0086] The device for determining the implantation position of a steel plate based on the distal end of the femur includes a processor and a memory. The above-mentioned reconstruction unit 801, the first determination unit 802, the implantation unit 803, the second determination unit 804, etc. are all stored in the memory as program units. The processor executes the above-mentioned program units stored in the memory to realize accurate determination of the implantation position of the steel plate.

[0087] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the accurate determination of the implantation position of the steel plate can be achieved by adjusting the kernel parameters.

[0088] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0089] An embodiment of the present invention provides a computer-readable storage medium having a program stored thereon, and when the program is executed by a processor, a method for determining a steel plate implantation position based on the distal end of the femur is implemented.

[0090] An embodiment of the present invention provides a processor, which is used to run a program, wherein the program executes a method for determining a steel plate implantation position based on the distal end of the femur when running.

[0091] like Fig. 9 As shown, an embodiment of the present invention provides an electronic device, the device includes a processor, a memory, and a program stored in the memory and executable on the processor, and the processor implements the following steps when executing the program: a reconstruction unit, used to perform three-dimensional reconstruction based on the image data of the distal femur of the target object, to obtain a three-dimensional model one corresponding to the distal femur of the target object; a first determination unit, used to determine a preset implantation area of ​​a target implant plate based on the three-dimensional model one; an implantation unit, used to implant each of a plurality of to-be-implanted steel plates into the three-dimensional model one within the preset implantation area, to obtain a plurality of three-dimensional models two, wherein each to-be-implanted steel plate corresponds to a different type of steel plate; a second determination unit, used to determine a target implant plate from a plurality of to-be-implanted steel plates based on the three-dimensional model one and a plurality of three-dimensional models two, and determine the implantation position corresponding to the target implant plate as the target implantation position.

[0092] Optionally, the second determination unit includes: a first determination subunit, used to determine the fracture morphology corresponding to the target object based on the three-dimensional model one; a second determination subunit, used to determine the distance calculation rule between the steel plate to be implanted in each three-dimensional model two and the distal end of the femur of the target object based on the fracture morphology; a calculation subunit, used to calculate the distance between the steel plate to be implanted in each three-dimensional model two and the target position in the distal end of the femur according to the distance calculation rule, and obtain multiple distance values, wherein the multiple distance values ​​are used to characterize the degree of fit between the multiple steel plates to be implanted and the distal end of the femur of the target object; a third determination subunit, used to determine the target implant steel plate from the multiple steel plates to be implanted based on the multiple distance values, and determine the implantation position corresponding to the target implant steel plate as the target implantation position.

[0093] Optionally, the third determination subunit includes: a first determination module, used to determine the initial implanted steel plate and the three-dimensional model 2 corresponding to the initial implanted steel plate from multiple steel plates to be implanted based on multiple distance values; an analysis module, used to perform finite element analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a target analysis result; a judgment module, used to judge whether the target analysis result meets a preset condition and obtain a judgment result; a second determination module, used to determine the initial implanted steel plate as the target implanted steel plate if the judgment result indicates that the target analysis result meets the preset condition, and determine the implantation position corresponding to the target implanted steel plate as the target implantation position.

[0094] Optionally, the analysis module includes: a first analysis submodule, used to perform axial compression analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a first analysis result; a second analysis submodule, used to perform torsional analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a second analysis result; and a determination submodule, used to determine the target analysis result based on the first analysis result and the second analysis result.

[0095] Optionally, the first analysis submodule includes: a first calculation submodule, which is used to calculate according to the weight of the target object to obtain a target load value corresponding to the target object; a first analysis submodule, which is used to perform axial compression analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate according to the target load value to obtain a first parameter, wherein the first parameter at least includes: the axial displacement of the distal femur of the target object, the maximum displacement of the femur and the first equivalent stress value corresponding to the initial implanted steel plate; a second calculation submodule, which is used to calculate according to the target load value and the maximum displacement of the femur to obtain the axial stiffness corresponding to the three-dimensional model 2 corresponding to the initial implanted steel plate; a first determination submodule, which is used to determine the first analysis result based on the axial stiffness and the first parameter.

[0096] Optionally, the second analysis submodule includes: a third calculation submodule, which is used to calculate based on the weight of the target object to obtain a target femoral torsional moment corresponding to the target object; a second analysis submodule, which is used to perform a torsional analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate based on the target femoral torsional moment to obtain a second parameter, wherein the second parameter at least includes: the maximum femoral torsional angle of the distal femur of the target object, the maximum femoral torsional displacement and the second equivalent stress value corresponding to the initial implanted steel plate; a fourth calculation submodule, which is used to calculate based on the femoral torsional moment and the maximum femoral torsional angle to obtain the axial rotational stiffness corresponding to the three-dimensional model 2 corresponding to the initial implanted steel plate; and a second determination submodule, which is used to determine the second analysis result based on the axial rotational stiffness and the second parameter.

[0097] Optionally, the reconstruction unit includes: a reconstruction subunit, used to perform three-dimensional reconstruction based on the image data to obtain an initial three-dimensional model one corresponding to the distal femur of the target object; an optimization subunit, used to optimize the initial three-dimensional model one to obtain an optimized initial three-dimensional model one; and a division subunit, used to grid the optimized initial three-dimensional model one to obtain a three-dimensional model one.

[0098] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0099] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program initialized with the following method steps: a reconstruction unit, used to perform three-dimensional reconstruction based on the image data of the distal femur of the target object, and obtain a three-dimensional model one corresponding to the distal femur of the target object; a first determination unit, used to determine a preset implantation area of ​​a target implant plate based on the three-dimensional model one; an implantation unit, used to implant each of a plurality of to-be-implanted steel plates into the three-dimensional model one within the preset implantation area, and obtain a plurality of three-dimensional models two, wherein each to-be-implanted steel plate corresponds to a different steel plate type; a second determination unit, used to determine a target implant plate from a plurality of to-be-implanted steel plates based on the three-dimensional model one and a plurality of three-dimensional models two, and determine the implantation position corresponding to the target implant plate as the target implantation position.

[0100] Optionally, the second determination unit includes: a first determination subunit, used to determine the fracture morphology corresponding to the target object based on the three-dimensional model one; a second determination subunit, used to determine the distance calculation rule between the steel plate to be implanted in each three-dimensional model two and the distal end of the femur of the target object based on the fracture morphology; a calculation subunit, used to calculate the distance between the steel plate to be implanted in each three-dimensional model two and the target position in the distal end of the femur according to the distance calculation rule, and obtain multiple distance values, wherein the multiple distance values ​​are used to characterize the degree of fit between the multiple steel plates to be implanted and the distal end of the femur of the target object; a third determination subunit, used to determine the target implant steel plate from the multiple steel plates to be implanted based on the multiple distance values, and determine the implantation position corresponding to the target implant steel plate as the target implantation position.

[0101] Optionally, the third determination subunit includes: a first determination module, used to determine the initial implanted steel plate and the three-dimensional model 2 corresponding to the initial implanted steel plate from multiple steel plates to be implanted based on multiple distance values; an analysis module, used to perform finite element analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a target analysis result; a judgment module, used to judge whether the target analysis result meets a preset condition and obtain a judgment result; a second determination module, used to determine the initial implanted steel plate as the target implanted steel plate if the judgment result indicates that the target analysis result meets the preset condition, and determine the implantation position corresponding to the target implanted steel plate as the target implantation position.

[0102] Optionally, the analysis module includes: a first analysis submodule, used to perform axial compression analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a first analysis result; a second analysis submodule, used to perform torsional analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a second analysis result; and a determination submodule, used to determine the target analysis result based on the first analysis result and the second analysis result.

[0103] Optionally, the first analysis submodule includes: a first calculation submodule, which is used to calculate according to the weight of the target object to obtain a target load value corresponding to the target object; a first analysis submodule, which is used to perform axial compression analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate according to the target load value to obtain a first parameter, wherein the first parameter at least includes: the axial displacement of the distal femur of the target object, the maximum displacement of the femur and the first equivalent stress value corresponding to the initial implanted steel plate; a second calculation submodule, which is used to calculate according to the target load value and the maximum displacement of the femur to obtain the axial stiffness corresponding to the three-dimensional model 2 corresponding to the initial implanted steel plate; a first determination submodule, which is used to determine the first analysis result based on the axial stiffness and the first parameter.

[0104] Optionally, the second analysis submodule includes: a third calculation submodule, which is used to calculate based on the weight of the target object to obtain a target femoral torsional moment corresponding to the target object; a second analysis submodule, which is used to perform a torsional analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate based on the target femoral torsional moment to obtain a second parameter, wherein the second parameter at least includes: the maximum femoral torsional angle of the distal femur of the target object, the maximum femoral torsional displacement and the second equivalent stress value corresponding to the initial implanted steel plate; a fourth calculation submodule, which is used to calculate based on the femoral torsional moment and the maximum femoral torsional angle to obtain the axial rotational stiffness corresponding to the three-dimensional model 2 corresponding to the initial implanted steel plate; and a second determination submodule, which is used to determine the second analysis result based on the axial rotational stiffness and the second parameter.

[0105] Optionally, the reconstruction unit includes: a reconstruction subunit, used to perform three-dimensional reconstruction based on the image data to obtain an initial three-dimensional model one corresponding to the distal femur of the target object; an optimization subunit, used to optimize the initial three-dimensional model one to obtain an optimized initial three-dimensional model one; and a division subunit, used to grid the optimized initial three-dimensional model one to obtain a three-dimensional model one.

[0106] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0107] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0108] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0109] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0110] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0111] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0112] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0113] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0114] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0115] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for determining the implantation position of a steel plate based on the distal end of the femur, characterized in that: include: Performing three-dimensional reconstruction based on the image data of the distal femur of the target object to obtain a three-dimensional model 1 corresponding to the distal femur of the target object; Determining a preset implantation area of ​​a target implanted steel plate based on the three-dimensional model 1; In the preset implantation area, each of the multiple steel plates to be implanted is implanted into the three-dimensional model one to obtain multiple three-dimensional models two, wherein each steel plate to be implanted corresponds to a different steel plate type; Determine the target implant steel plate from the multiple steel plates to be implanted based on the three-dimensional model one and the multiple three-dimensional models two, and determine the implantation position corresponding to the target implant steel plate as the target implantation position; Wherein, according to the three-dimensional model one and the plurality of three-dimensional models two, determining the target implant steel plate from the plurality of steel plates to be implanted, and determining the implantation position corresponding to the target implant steel plate as the target implantation position comprises: Determining the fracture morphology corresponding to the target object according to the three-dimensional model 1; Determine a distance calculation rule between the steel plate to be implanted in each three-dimensional model 2 and the distal end of the femur of the target object according to the fracture morphology; The distance between the steel plates to be implanted in each three-dimensional model 2 and the target position in the distal end of the femur is calculated by the distance calculation rule to obtain a plurality of distance values, wherein the plurality of distance values ​​are used to characterize the degree of fit between the plurality of steel plates to be implanted and the distal end of the femur of the target object; Based on the multiple distance values, the target implant steel plate is determined from the multiple steel plates to be implanted, and the implantation position corresponding to the target implant steel plate is determined as the target implantation position.

2. The method according to claim 1, characterized in that Determining the target implantation steel plate from the multiple to-be-implanted steel plates according to the multiple distance values, and determining the implantation position corresponding to the target implantation steel plate as the target implantation position comprises: Determine, according to the plurality of distance values, an initial implanted steel plate from the plurality of steel plates to be implanted and a second three-dimensional model corresponding to the initial implanted steel plate; Performing finite element analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain target analysis results; Determine whether the target analysis result meets the preset conditions and obtain a determination result; If the judgment result indicates that the target analysis result satisfies the preset condition, the initially implanted steel plate is determined as the target implanted steel plate, and the implantation position corresponding to the target implanted steel plate is determined as the target implantation position.

3. The method according to claim 2, characterized in that Finite element analysis is performed on the three-dimensional model 2 corresponding to the initial implanted steel plate, and the target analysis results obtained include: Performing axial compression analysis on the three-dimensional model 2 corresponding to the initial implanted steel plate to obtain a first analysis result; Performing a torsion analysis on the three-dimensional model 2 corresponding to the initially implanted steel plate to obtain a second analysis result; The target analysis result is determined according to the first analysis result and the second analysis result.

4. The method according to claim 3, characterized in that Axial compression analysis is performed on the three-dimensional model 2 corresponding to the initially implanted steel plate, and the first analysis result obtained includes: Calculating according to the weight of the target object to obtain a target load value corresponding to the target object; Performing the axial compression analysis on the three-dimensional model 2 corresponding to the initially implanted steel plate according to the target load value to obtain a first parameter, wherein the first parameter at least includes: the axial displacement of the distal end of the femur of the target object, the maximum displacement of the femur, and the first equivalent stress value corresponding to the initially implanted steel plate; Calculating according to the target load value and the maximum displacement of the femur to obtain the axial stiffness corresponding to the three-dimensional model 2 corresponding to the initial implanted steel plate; The first analysis result is determined according to the axial stiffness and the first parameter.

5. The method according to claim 3, characterized in that: The second three-dimensional model corresponding to the initially implanted steel plate is subjected to a torsion analysis, and the second analysis result obtained includes: Calculating according to the weight of the target object to obtain a target femoral torsional moment corresponding to the target object; Performing the torsion analysis on the three-dimensional model 2 corresponding to the initially implanted steel plate according to the target femoral torsion moment to obtain a second parameter, wherein the second parameter at least includes: a maximum femoral torsion angle of the distal femur of the target object, a maximum femoral torsion displacement, and a second equivalent stress value corresponding to the initially implanted steel plate; Calculating according to the femoral torsional moment and the maximum femoral torsional angle, obtaining the axial rotation stiffness corresponding to the three-dimensional model 2 corresponding to the initial implanted steel plate; The second analysis result is determined according to the shaft rotation stiffness and the second parameter.

6. The method according to claim 1, characterized in that Performing three-dimensional reconstruction based on the image data of the distal femur of the target object to obtain a three-dimensional model corresponding to the distal femur of the target object includes: Performing three-dimensional reconstruction based on the image data to obtain an initial three-dimensional model 1 corresponding to the distal femur of the target object; Optimizing the initial three-dimensional model 1 to obtain an optimized initial three-dimensional model 1; The optimized initial three-dimensional model 1 is meshed to obtain the three-dimensional model 1.

7. A device for determining the implantation position of a steel plate based on the distal end of the femur, characterized in that: include: A reconstruction unit, configured to perform three-dimensional reconstruction based on the image data of the distal femur of the target object to obtain a three-dimensional model 1 corresponding to the distal femur of the target object; A first determining unit, configured to determine a preset implantation area of ​​a target implanted steel plate according to the three-dimensional model 1; An implantation unit, used for implanting each of the multiple steel plates to be implanted into the three-dimensional model one in the preset implantation area, to obtain multiple three-dimensional models two, wherein each steel plate to be implanted corresponds to a different steel plate type; A second determination unit is used to determine the target implant steel plate from the multiple steel plates to be implanted based on the three-dimensional model one and the multiple three-dimensional models two, and determine the implantation position corresponding to the target implant steel plate as the target implantation position; Among them, the second determination unit includes: a first determination subunit, used to determine the fracture morphology corresponding to the target object based on the three-dimensional model one; a second determination subunit, used to determine the distance calculation rule between the steel plate to be implanted in each three-dimensional model two and the distal end of the femur of the target object based on the fracture morphology; a calculation subunit, used to calculate the distance between the steel plate to be implanted in each three-dimensional model two and the target position in the distal end of the femur according to the distance calculation rule, and obtain multiple distance values, wherein the multiple distance values ​​are used to characterize the degree of fit between the multiple steel plates to be implanted and the distal end of the femur of the target object; a third determination subunit, used to determine the target implant steel plate from the multiple steel plates to be implanted based on the multiple distance values, and determine the implantation position corresponding to the target implant steel plate as the target implantation position.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the storage medium is controlled to execute the method for determining the implantation position of a steel plate based on the distal end of the femur as described in any one of claims 1 to 6 on a device.

9. An electronic device, characterized in that: It includes one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the method for determining the implantation position of a steel plate based on the distal end of the femur as described in any one of claims 1 to 6.

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