Preoperative planning methods and systems based on hip joint femoral postoperative motion simulation

Abstract

This application provides a method, system, device, and computer-readable storage medium for preoperative planning based on postoperative femoral joint motion simulation of the hip joint. The method includes: acquiring CT images of the patient's hip joint; performing three-dimensional reconstruction based on the CT images to obtain a three-dimensional model of the hip joint; performing preoperative planning based on the three-dimensional model to obtain an initial preoperative planning scheme; after performing a simulated surgery according to the initial preoperative planning scheme, performing postoperative motion simulation on the femoral joint to determine whether various motion simulations can achieve the corresponding normal joint range of motion; if at least one motion simulation cannot achieve the corresponding normal joint range of motion, adjusting the initial preoperative planning scheme to obtain a final preoperative planning scheme. According to the embodiments of this application, preoperative planning can be performed more accurately.

Description

Technical Field

[0001] This application belongs to the field of preoperative planning, and in particular relates to a preoperative planning method, system, device and computer-readable storage medium based on postoperative femoral motion simulation of the hip joint. Background Technology

[0002] Currently, a method for assessing postoperative joint mobility in hip replacement surgery is disclosed in related technologies, including: completing hip replacement surgery, registering the patient's hip bone and femur in a camera coordinate system; calculating the range of motion of the femur in three directions: external rotation and internal rotation, abduction and adduction, and flexion and extension; recording the range of motion of the femur, and assessing the postoperative femoral mobility of the patient.

[0003] It is evident that this method is used to assess the postoperative femoral mobility of patients after hip replacement surgery, but at this point, the preoperative plan cannot be adjusted or modified.

[0004] Therefore, how to conduct more accurate preoperative planning is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This application provides a method, system, device, and computer-readable storage medium for preoperative planning based on hip joint femoral postoperative motion simulation, which enables more accurate preoperative planning.

[0006] In a first aspect, embodiments of this application provide a preoperative planning method based on postoperative femoral joint movement simulation, including:

[0007] Obtain CT images of the patient's hip joint;

[0008] A three-dimensional model of the hip joint is obtained by reconstructing the hip joint based on CT images.

[0009] Preoperative planning was performed based on a 3D model of the hip joint to obtain an initial preoperative planning scheme.

[0010] After a simulated surgery based on the initial preoperative plan, postoperative motion simulations of the hip joint and femur were performed to determine whether various motion simulations could achieve the corresponding normal joint range of motion. The motion simulations included abduction, adduction, flexion, extension, external rotation after flexion, and internal rotation after flexion.

[0011] If at least one of the motion simulations fails to achieve the corresponding normal joint range of motion, the initial preoperative planning scheme is adjusted to obtain the final preoperative planning scheme.

[0012] Optionally, after acquiring the patient's hip CT images, the process may also include:

[0013] Denoising and smoothing preprocessing was performed on the hip joint CT images;

[0014] The noise reduction process includes Gaussian filtering, median filtering, and bilateral filtering.

[0015] Smoothing processes include anisotropic diffusion and nonlocal mean filtering.

[0016] Optionally, the hip joint CT images may undergo denoising and smoothing preprocessing, including:

[0017] Choose a filter kernel size of 3x3 or 5x5; the kernel size directly affects the degree of noise reduction.

[0018] The image is convolved with a Gaussian filter kernel to remove high-frequency noise.

[0019] The diffusion coefficient is selected to control the diffusion intensity during the smoothing process;

[0020] The image is gradually smoothed by iteratively updating the value of each pixel in the image using the diffusion equation.

[0021] Optionally, a three-dimensional reconstruction is performed based on hip joint CT images to obtain a three-dimensional model of the hip joint, including:

[0022] Import hip joint CT images into 3D reconstruction software;

[0023] Image segmentation was performed on hip joint CT images to obtain the image segmentation results;

[0024] Based on the image segmentation results, a three-dimensional reconstruction is performed to obtain an initial three-dimensional model of the hip joint.

[0025] The initial 3D model of the hip joint is smoothed and filled with holes to obtain the final 3D model of the hip joint.

[0026] Optionally, preoperative planning can be performed based on a 3D model of the hip joint to obtain an initial preoperative planning scheme, including:

[0027] Based on a three-dimensional model of the hip joint, key anatomical landmarks are marked. These landmarks include the femoral head, the edge of the acetabulum, the center of the acetabulum, and the femoral neck axis, which are used to determine the installation position and angle of the prosthesis.

[0028] Determine the type of implant and match the implant size;

[0029] Determine the implant placement and angle;

[0030] Select the surgical approach and simulate the surgical procedure path.

[0031] Based on comprehensive information such as prosthesis selection, installation location, surgical approach, and prediction of motor function, an initial preoperative planning scheme is generated.

[0032] Optionally, after a simulated surgery based on the initial preoperative planning, postoperative motion simulations of the hip joint and femur are performed to determine whether various motion simulations can achieve the corresponding normal joint range of motion, including:

[0033] After performing a simulated surgery according to the initial preoperative planning, the hip joint was simulated in abduction and adduction to observe whether there was any abnormal contact or conflict between the prosthesis and the bone.

[0034] Simulate hip joint movements in flexion and extension, focusing on the rotational friction of the prosthesis between the acetabulum and femur, and whether there is any obstruction or jamming.

[0035] With the hip joint flexed, simulate external rotation and internal rotation movements respectively, observe the flexibility of joint rotation, and focus on assessing whether there is friction or interference between the prosthesis edge and soft tissue.

[0036] Optionally, if at least one of the motion simulations fails to achieve the corresponding normal joint range of motion, the initial preoperative planning scheme is adjusted to obtain the final preoperative planning scheme, including:

[0037] If at least one of the motion simulations fails to achieve the corresponding normal joint range of motion, the model of the acetabular prosthesis and femoral prosthesis in the initial preoperative planning scheme will be adjusted.

[0038] Adjustments were made to the implant angle and surgical approach.

[0039] Secondly, embodiments of this application provide a preoperative planning system based on postoperative hip joint femoral surgery motion simulation, comprising:

[0040] Image acquisition module, used to acquire CT images of the patient's hip joint;

[0041] The 3D reconstruction module is used to perform 3D reconstruction based on hip joint CT images to obtain a 3D model of the hip joint.

[0042] The preoperative planning module is used to perform preoperative planning based on a 3D model of the hip joint and obtain an initial preoperative planning scheme.

[0043] The postoperative motion simulation module is used to simulate the postoperative motion of the hip joint and femur after a simulated surgery based on the initial preoperative planning scheme, and to determine whether various motion simulations can achieve the corresponding normal joint range of motion; the motion simulations include: abduction, adduction, flexion, extension, external rotation after flexion and internal rotation after flexion;

[0044] The preoperative planning scheme adjustment module is used to adjust the initial preoperative planning scheme to obtain the final preoperative planning scheme if at least one of the motion simulations cannot achieve the corresponding normal joint range of motion.

[0045] Thirdly, embodiments of this application provide an electronic device, which includes: a processor and a memory storing computer program instructions;

[0046] When the processor executes the computer program instructions, it implements a preoperative planning method based on postoperative femoral joint movement simulation.

[0047] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer program instructions, which, when executed by a processor, implement a preoperative planning method based on postoperative hip joint femoral movement simulation.

[0048] The preoperative planning method, system, device, and computer-readable storage medium based on postoperative femoral joint motion simulation of the present application embodiments can perform preoperative planning more accurately.

[0049] This preoperative planning method based on postoperative hip and femoral joint motion simulation includes:

[0050] Obtain CT images of the patient's hip joint;

[0051] A three-dimensional model of the hip joint is obtained by reconstructing the hip joint based on CT images.

[0052] Preoperative planning was performed based on a 3D model of the hip joint to obtain an initial preoperative planning scheme.

[0053] After a simulated surgery based on the initial preoperative plan, postoperative motion simulations of the hip joint and femur were performed to determine whether various motion simulations could achieve the corresponding normal joint range of motion. The motion simulations included abduction, adduction, flexion, extension, external rotation after flexion, and internal rotation after flexion.

[0054] If at least one of the motion simulations fails to achieve the corresponding normal joint range of motion, the initial preoperative planning scheme is adjusted to obtain the final preoperative planning scheme. Attached Figure Description

[0055] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0056] Figure 1 This is a flowchart illustrating a preoperative planning method based on postoperative femoral joint motion simulation provided in one embodiment of this application.

[0057] Figure 2This is a schematic diagram of the structure of a preoperative planning system based on postoperative femoral joint movement simulation provided in one embodiment of this application;

[0058] Figure 3 This is a schematic diagram of the structure of an electronic device provided in one embodiment of this application;

[0059] Figure 4 This is a schematic diagram of motion simulation provided in one embodiment of this application. Detailed Implementation

[0060] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0062] To address the problems of the prior art, embodiments of this application provide a preoperative planning method, system, device, and computer-readable storage medium based on postoperative hip joint femoral osteotomy motion simulation. The preoperative planning method based on postoperative hip joint femoral osteotomy motion simulation provided in this application embodiment will be described below first.

[0063] Figure 1 This illustration shows a flowchart of a preoperative planning method based on postoperative hip joint femoral surgery motion simulation according to an embodiment of this application. Figure 1 As shown, this preoperative planning method based on postoperative hip joint femoral surgery motion simulation includes:

[0064] S101. Obtain CT images of the patient's hip joint;

[0065] S102. Perform three-dimensional reconstruction based on hip joint CT images to obtain a three-dimensional model of the hip joint;

[0066] S103. Based on the three-dimensional model of the hip joint, perform preoperative planning to obtain an initial preoperative planning scheme;

[0067] S104. After performing a simulated surgery according to the initial preoperative planning scheme, postoperative motion simulation of the hip joint and femur is performed to determine whether various motion simulations can achieve the corresponding normal joint range of motion; among which, the motion simulation includes: abduction, adduction, flexion, extension, external rotation after flexion and internal rotation after flexion;

[0068] in, Figure 4 This is a schematic diagram of motion simulation provided in one embodiment of this application.

[0069] S105. If at least one of the motion simulations cannot achieve the corresponding normal joint range of motion, the initial preoperative planning scheme shall be adjusted to obtain the final preoperative planning scheme.

[0070] In one embodiment, after acquiring CT images of the patient's hip joint, the method further includes:

[0071] Denoising and smoothing preprocessing was performed on the hip joint CT images;

[0072] The noise reduction process includes Gaussian filtering, median filtering, and bilateral filtering.

[0073] Smoothing processes include anisotropic diffusion and nonlocal mean filtering.

[0074] In one embodiment, preprocessing of hip joint CT images for denoising and smoothing includes:

[0075] Choose a filter kernel size of 3x3 or 5x5; the kernel size directly affects the degree of noise reduction.

[0076] The image is convolved with a Gaussian filter kernel to remove high-frequency noise.

[0077] The diffusion coefficient is selected to control the diffusion intensity during the smoothing process;

[0078] The image is gradually smoothed by iteratively updating the value of each pixel in the image using the diffusion equation.

[0079] In one embodiment, a three-dimensional reconstruction of the hip joint based on CT images yields a three-dimensional model of the hip joint, including:

[0080] Import hip joint CT images into 3D reconstruction software;

[0081] Image segmentation was performed on hip joint CT images to obtain the image segmentation results;

[0082] Based on the image segmentation results, a three-dimensional reconstruction is performed to obtain an initial three-dimensional model of the hip joint.

[0083] The initial 3D model of the hip joint is smoothed and filled with holes to obtain the final 3D model of the hip joint.

[0084] In one embodiment, preoperative planning is performed based on a three-dimensional model of the hip joint to obtain an initial preoperative planning scheme, including:

[0085] Based on a three-dimensional model of the hip joint, key anatomical landmarks are marked. These landmarks include the femoral head, the edge of the acetabulum, the center of the acetabulum, and the femoral neck axis, which are used to determine the installation position and angle of the prosthesis.

[0086] Determine the type of implant and match the implant size;

[0087] Determine the implant placement and angle;

[0088] Select the surgical approach and simulate the surgical procedure path.

[0089] Based on comprehensive information such as prosthesis selection, installation location, surgical approach, and prediction of motor function, an initial preoperative planning scheme is generated.

[0090] In one embodiment, after a simulated surgery based on an initial preoperative planning scheme, postoperative motion simulation of the hip joint and femur is performed to determine whether various motion simulations can achieve the corresponding normal joint range of motion, including:

[0091] After performing a simulated surgery according to the initial preoperative planning, the hip joint was simulated in abduction and adduction to observe whether there was any abnormal contact or conflict between the prosthesis and the bone.

[0092] Simulate hip joint movements in flexion and extension, focusing on the rotational friction of the prosthesis between the acetabulum and femur, and whether there is any obstruction or jamming.

[0093] With the hip joint flexed, simulate external rotation and internal rotation movements respectively, observe the flexibility of joint rotation, and focus on assessing whether there is friction or interference between the prosthesis edge and soft tissue.

[0094] In one embodiment, if at least one of the motion simulations fails to achieve the corresponding normal joint range of motion, the initial preoperative planning scheme is adjusted to obtain a final preoperative planning scheme, including:

[0095] If at least one of the motion simulations fails to achieve the corresponding normal joint range of motion, the model of the acetabular prosthesis and femoral prosthesis in the initial preoperative planning scheme will be adjusted.

[0096] Adjustments were made to the implant angle and surgical approach.

[0097] Figure 2 This is a schematic diagram of the structure of a preoperative planning system based on postoperative hip and femoral joint movement simulation according to an embodiment of this application; the preoperative planning system based on postoperative hip and femoral joint movement simulation includes:

[0098] Image acquisition module 201 is used to acquire CT images of the patient's hip joint;

[0099] The 3D reconstruction module 202 is used to perform 3D reconstruction based on hip joint CT images to obtain a 3D model of the hip joint.

[0100] The preoperative planning module 203 is used to perform preoperative planning based on the three-dimensional model of the hip joint to obtain an initial preoperative planning scheme.

[0101] The postoperative motion simulation module 204 is used to simulate the postoperative motion of the hip joint and femur after a simulated surgery based on the initial preoperative planning scheme, and to determine whether various motion simulations can achieve the corresponding normal joint range of motion; the motion simulations include: abduction, adduction, flexion, extension, external rotation after flexion and internal rotation after flexion;

[0102] The preoperative planning scheme adjustment module 205 is used to adjust the initial preoperative planning scheme to obtain the final preoperative planning scheme if at least one of the motion simulations cannot achieve the corresponding normal joint range of motion.

[0103] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of this application is shown.

[0104] The electronic device may include a processor 301 and a memory 302 storing computer program instructions.

[0105] Specifically, the processor 301 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0106] Memory 302 may include mass storage for data or instructions. For example, and not limitingly, memory 302 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where suitable, memory 302 may include removable or non-removable (or fixed) media. Where suitable, memory 302 may be internal or external to an electronic device. In a particular embodiment, memory 302 may be a non-volatile solid-state memory.

[0107] In one embodiment, memory 302 may be read-only memory (ROM). In one embodiment, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0108] The processor 301 reads and executes computer program instructions stored in the memory 302 to implement any of the preoperative planning methods based on postoperative hip joint femoral movement simulation in the above embodiments.

[0109] In one example, the electronic device may also include a communication interface 303 and a bus 310. For example, Figure 3 As shown, the processor 301, memory 302, and communication interface 303 are connected through bus 310 and complete communication with each other.

[0110] The communication interface 303 is mainly used to realize communication between various modules, systems, units and / or devices in the embodiments of this application.

[0111] Bus 310 includes hardware, software, or both, that couples components of an electronic device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 310 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, this application contemplates any suitable bus or interconnect.

[0112] Furthermore, in conjunction with the preoperative planning method based on postoperative hip and femoral joint movement simulation in the above embodiments, this application embodiment can provide a computer-readable storage medium for implementation. This computer-readable storage medium stores computer program instructions; when executed by a processor, these computer program instructions implement any of the preoperative planning methods based on postoperative hip and femoral joint movement simulation in the above embodiments.

[0113] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0114] The functional modules shown in the above-described block diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0115] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or systems. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0116] The foregoing flowcharts and / or block diagrams of methods, systems, and computer program products according to embodiments of this application have described various aspects of the present application. It should be understood that each block in the flowcharts and / or block diagrams, and combinations of blocks in the flowcharts and / or block diagrams, 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, or other programmable data processing system to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing system, enable the implementation of the functions / actions specified in one or more blocks of the flowcharts and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by special-purpose hardware performing the specified functions or actions, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0117] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A preoperative planning method based on postoperative femoral joint movement simulation, characterized in that, include: Obtain CT images of the patient's hip joint; A three-dimensional model of the hip joint is obtained by reconstructing the hip joint based on CT images. Preoperative planning based on a 3D model of the hip joint yields an initial preoperative planning scheme. This initial scheme includes: establishing key anatomical landmarks based on the 3D model; these landmarks include the femoral head, acetabular rim, acetabular center, and femoral neck axis, used to determine the prosthesis placement and angle; determining the prosthesis type and matching its dimensions; determining the prosthesis implantation location and angle; selecting the surgical approach and simulating the surgical path; and generating the initial preoperative planning scheme based on comprehensive information including prosthesis selection, placement location, surgical approach, and predicted motor function. After a simulated surgery based on the initial preoperative plan, postoperative motion simulations of the hip joint and femur were performed to determine whether various motion simulations could achieve the corresponding normal joint range of motion. The motion simulations included abduction, adduction, flexion, extension, external rotation after flexion, and internal rotation after flexion. If at least one of the motion simulations fails to achieve the corresponding normal joint range of motion, the initial preoperative planning scheme is adjusted to obtain the final preoperative planning scheme. This adjustment includes: adjusting the model of the acetabular prosthesis and femoral prosthesis in the initial preoperative planning scheme; and adjusting the prosthesis implantation angle and surgical approach.

2. The preoperative planning method based on postoperative femoral joint motion simulation according to claim 1, characterized in that, After acquiring CT images of the patient's hip joint, the following steps are also included: Denoising and smoothing preprocessing was performed on the hip joint CT images; The noise reduction process includes Gaussian filtering, median filtering, and bilateral filtering. Smoothing processes include anisotropic diffusion and nonlocal mean filtering.

3. The preoperative planning method based on postoperative femoral joint motion simulation according to claim 2, characterized in that, Preprocessing of hip joint CT images, including denoising and smoothing, includes: Choose a filter kernel size of 3x3 or 5x5; the kernel size directly affects the degree of noise reduction. The image is convolved with a Gaussian filter kernel to remove high-frequency noise. The diffusion coefficient is selected to control the diffusion intensity during the smoothing process; The image is gradually smoothed by iteratively updating the value of each pixel in the image using the diffusion equation.

4. The preoperative planning method based on postoperative femoral joint motion simulation according to claim 1, characterized in that, Three-dimensional reconstruction based on hip joint CT images yields a three-dimensional model of the hip joint, including: Import hip joint CT images into 3D reconstruction software; Image segmentation was performed on hip joint CT images to obtain the image segmentation results; Based on the image segmentation results, a three-dimensional reconstruction is performed to obtain an initial three-dimensional model of the hip joint. The initial 3D model of the hip joint is smoothed and filled with holes to obtain the final 3D model of the hip joint.

5. The preoperative planning method based on postoperative femoral joint motion simulation according to claim 1, characterized in that, Following a simulated surgery based on the initial preoperative planning, postoperative motion simulations of the hip joint and femur were performed to determine whether various simulated movements could achieve the corresponding normal range of motion, including: After performing a simulated surgery according to the initial preoperative planning, the hip joint was simulated in abduction and adduction to observe whether there was any abnormal contact or conflict between the prosthesis and the bone. Simulate hip joint movements in flexion and extension, focusing on rotational friction of the prosthesis between the acetabulum and femur, and whether there is any obstruction or jamming. With the hip joint flexed, simulate external rotation and internal rotation movements respectively, observe the flexibility of joint rotation, and assess whether there is friction or interference between the prosthesis edge and soft tissue.

6. A preoperative planning system based on postoperative femoral joint movement simulation, characterized in that, The system includes: Image acquisition module, used to acquire CT images of the patient's hip joint; The 3D reconstruction module is used to perform 3D reconstruction based on hip joint CT images to obtain a 3D model of the hip joint. The preoperative planning module is used to perform preoperative planning based on a 3D model of the hip joint, resulting in an initial preoperative planning scheme. This initial scheme includes: marking key anatomical points based on the 3D model; these anatomical landmarks include the femoral head, acetabular rim, acetabular center, and femoral neck axis, used to determine the prosthesis placement and angle; determining the prosthesis type and matching its dimensions; determining the prosthesis implantation position and angle; selecting the surgical approach and simulating the surgical procedure; and generating the initial preoperative planning scheme based on comprehensive information including prosthesis selection, placement, surgical approach, and predicted motor function. The postoperative motion simulation module is used to simulate the postoperative motion of the hip joint and femur after a simulated surgery based on the initial preoperative planning scheme, and to determine whether various motion simulations can achieve the corresponding normal joint range of motion; the motion simulations include: abduction, adduction, flexion, extension, external rotation after flexion and internal rotation after flexion; The preoperative planning adjustment module is used to adjust the initial preoperative planning scheme to obtain the final preoperative planning scheme if at least one of the motion simulations fails to achieve the corresponding normal joint range of motion. This adjustment includes: adjusting the model of the acetabular prosthesis and femoral prosthesis in the initial preoperative planning scheme if at least one of the motion simulations fails to achieve the corresponding normal joint range of motion; and adjusting the prosthesis implantation angle and surgical approach.

7. An electronic device, characterized in that, The electronic device includes: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, it implements the preoperative planning method based on postoperative hip joint femoral movement simulation as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions, which, when executed by a processor, implement the preoperative planning method based on postoperative hip joint femoral movement simulation as described in any one of claims 1-5.

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