Femoral Neck Measurement Method, System, Device and Medium Based on Optical Positioning

Abstract

The present invention discloses a femoral neck measurement method, system, device and medium based on optical positioning. The method includes: measuring the affected limb after installing the femoral stem prosthesis through an optical positioning probe, and calculating the actual length of the femoral neck required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis; determining the selected femoral head prosthesis and femoral neck prosthesis according to the calculated actual length of the femoral neck and the femoral neck length of the healthy limb measured before surgery; measuring the length of the affected limb after implanting the femoral head prosthesis and the femoral neck prosthesis, and constraining the length difference between the healthy limb and the affected limb by adjusting the femoral neck length of the affected limb. By using optical measurement technology in total hip arthroplasty to measure and calculate the errors caused by surgical operations, the present invention can determine the actual effect achieved during the surgical execution in a relatively simple scenario, so that medical staff can timely adjust the selected prosthesis according to each stage of the surgery, improving the surgical quality.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and in particular to a method, system, device and medium for measuring the femoral neck based on optical positioning. Background Art

[0002] Due to the decline in bone mass in the elderly, the elderly are a high-risk group for hip joint diseases. With the development of social aging, total hip arthroplasty (THA) is one of the common methods for treating related hip joint diseases. However, the femur used in total hip arthroplasty depends on preoperative planning, and there are few coping strategies for adjusting the femoral neck length during the operation.

[0003] In the prior art, the methods for adjusting the femoral neck length during total hip arthroplasty are as follows: (1) Measuring the distance between two reference points using a vertical ruler, vernier caliper, Kirschner wire, etc. to determine the femoral offset, so as to adjust the femoral neck length. The operation difficulty is low, but it is necessary to directly intervene in the diseased part of the patient undergoing surgery, which may interfere with the doctor's operation, and the versatility is not strong, making it inconvenient for the doctor to quickly and visually read. (2) Using a computer-aided imaging system to complete the measurement of femoral neck morphological parameters. It can ensure accurate measurement, but the process is complex and the operation difficulty is high. Summary of the Invention

[0004] The purpose of the present invention is to provide a method, system, device and medium for measuring the femoral neck based on optical positioning, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions.

[0005] In a first aspect, a method for measuring the femoral neck based on optical positioning is provided, including:

[0006] Measuring the affected limb after installing the femoral stem prosthesis with an optical positioning probe, and calculating the actual femoral neck length required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis;

[0007] Determining the selected femoral head prosthesis and femoral neck prosthesis according to the calculated actual femoral neck length and the femoral neck length of the healthy limb measured preoperatively;

[0008] Measuring the length of the affected limb after implanting the femoral head prosthesis and the femoral neck prosthesis, and constraining the length difference between the healthy limb and the affected limb by adjusting the femoral neck length of the affected limb.

[0009] Further, the step of measuring the affected limb after installing the femoral stem prosthesis with an optical positioning probe and calculating the actual femoral neck length required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis includes:

[0010] Use an optical probe to measure three non - collinear reference points on the osteotomy surface of the affected limb respectively to determine the coordinates of the three reference points;

[0011] Pre - install the femoral ball prosthesis and femoral neck prosthesis selected before the operation. Use an optical probe to measure the measurement point of the femoral ball prosthesis far from the osteotomy surface to determine the coordinates of the measurement point of the femoral ball prosthesis;

[0012] Determine the plane position where the osteotomy surface of the affected limb is located according to the coordinates of the three reference points, calculate the distance between the osteotomy surface of the affected limb and the measurement point of the femoral ball prosthesis, and determine the actual length of the femoral neck in combination with the size of the femoral neck prosthesis.

[0013] Further, the step of determining the plane position where the osteotomy surface of the affected limb is located according to the coordinates of the three reference points, calculating the distance between the osteotomy surface of the affected limb and the measurement point of the femoral ball prosthesis, and determining the actual length of the femoral neck in combination with the size of the femoral neck prosthesis includes:

[0014] Substitute the coordinate value variables of the three reference points into the plane formula of the osteotomy surface of the affected limb for solution; the plane formula of the osteotomy surface of the affected limb is:

[0015] ax + by + cz + d = 0

[0016] In the formula, a, b, c, and d are all constants, and x, y, and z respectively represent the coordinate values of the points on the osteotomy surface of the affected limb;

[0017] Use the distance calculation formula to calculate the distance between the osteotomy surface of the affected limb and the measurement point;

[0018] The distance calculation formula is:

[0019]

[0020] In the formula, x4, y4, and z4 respectively represent the three coordinate values of the measurement point, and e represents the distance between the osteotomy surface of the affected limb and the measurement point;

[0021] Subtract the radius length of the pre - selected femoral ball prosthesis from the distance between the osteotomy surface of the affected limb and the measurement point to obtain the actual length of the femoral neck.

[0022] Further, the step of determining the selected femoral ball prosthesis and femoral neck prosthesis according to the actually calculated femoral neck length and the femoral neck length of the healthy limb measured before the operation includes:

[0023] Select the femoral neck prosthesis again according to the actual length of the femoral neck and the femoral neck length of the healthy limb;

[0024] Determine the size of the femoral ball prosthesis according to the size of the selected femoral neck prosthesis and the femoral neck length of the healthy limb, and select the final femoral ball prosthesis.

[0025] Further, the selection of the final femoral ball prosthesis includes:

[0026] Input the size of the selected femoral neck prosthesis into a preset femoral ball prosthesis database, and select a femoral ball prosthesis from the femoral ball prosthesis models output by the femoral ball prosthesis database.

[0027] Further, the measurement of the length of the affected limb after implanting the femoral ball prosthesis and the femoral neck prosthesis, and the adjustment of the length difference between the healthy limb and the affected limb by adjusting the femoral neck length of the affected limb, includes:

[0028] After implanting the femoral ball prosthesis and the femoral neck prosthesis into the affected limb, measure the length between the anterior superior iliac spine and the sole of the affected limb to obtain the length of the affected limb;

[0029] Compare the length of the affected limb with the length of the healthy limb measured before the operation to determine the length difference between the healthy limb and the affected limb;

[0030] Judge whether the length difference between the affected limb and the healthy limb exceeds the set value of lower limb length inequality. If it exceeds, replace the femoral ball prosthesis and / or the femoral neck prosthesis so that the difference between the length of the affected limb and the length of the healthy limb is within the range of the set value of lower limb length inequality.

[0031] Further, the set value of lower limb length inequality is 10 mm.

[0032] In a second aspect, a femoral neck measurement system based on optical positioning is provided, including:

[0033] A detection module for measuring the affected limb after installing the femoral stem prosthesis through an optical positioning probe, and calculating the actual length of the femoral neck required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis;

[0034] A first adjustment module for determining the selected femoral ball prosthesis and femoral neck prosthesis according to the calculated actual length of the femoral neck and the length of the femoral neck of the healthy limb measured before the operation;

[0035] A second adjustment module for measuring the length of the affected limb after implanting the femoral ball prosthesis and the femoral neck prosthesis, and adjusting the length difference between the healthy limb and the affected limb by adjusting the femoral neck length of the affected limb.

[0036] In a third aspect, a computer device is provided, including:

[0037] A memory storing a computer program;

[0038] A processor, when the processor executes the computer program, implements the femoral neck measurement method based on optical positioning as described in the first aspect.

[0039] In a fourth aspect, a computer storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method for measuring the femoral neck based on optical positioning as described in the first aspect is implemented.

[0040] Advantages of the present invention: By using optical measurement technology in total hip arthroplasty to measure the errors caused by surgical operations and calculate the errors, the actual effects achieved during the surgical execution can be determined in a relatively simple scenario, so that medical staff can timely adjust the selected prosthesis according to each stage of the operation, improving the surgical quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a flowchart of a method for measuring the femoral neck based on optical positioning shown according to an embodiment.

[0042] Figure 2 is a schematic structural diagram of a prosthesis implanted in the affected limb during total hip arthroplasty.

[0043] Figure 3 is a flowchart of the method of step S100 shown according to an embodiment.

[0044] Figure 4 is a flowchart of the method of step S200 shown according to an embodiment.

[0045] Figure 5 is a flowchart of the method of step S300 shown according to an embodiment.

[0046] Figure 6 is a structural block diagram of a femoral neck measurement system based on optical positioning shown according to an embodiment.

[0047] Figure 7 is an internal structural diagram of a computer device shown according to an embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described below in conjunction with the embodiments and the drawings.

[0049] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0050] According to a first aspect of the present invention, a method for measuring the femoral neck based on optical positioning is provided.

[0051] Refer to Figure 1 , Figure 1 which is a flowchart of a femoral neck measurement method based on optical positioning shown according to an embodiment. As Figure 1 shown, the method includes the following steps S100 to S300.

[0052] Step S100. Measure the affected limb after installing the femoral stem prosthesis through an optical positioning probe, and calculate the actual length of the femoral neck required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis.

[0053] As Figure 2 shown, the prosthesis implanted into the affected limb during total hip arthroplasty includes a femoral stem prosthesis, a femoral neck prosthesis, and a femoral head prosthesis. In the prior art, after installing all prostheses according to preoperative measurements and designed parameters, the doctor judges the difference between the two lower limbs based on experience, but lacks the consideration of the difference between the two lower limbs caused by the slight error in the implantation depth of the femoral stem prosthesis during the operation.

[0054] Step S100 is a detection performed after the femoral stem prosthesis is implanted into the affected limb. After the femoral stem prosthesis is implanted into the affected limb, the inclined plane on its upper surface serves as the femoral surface of the affected limb. After implanting the preselected femoral neck prosthesis and femoral head prosthesis on the femoral surface formed by the femoral stem prosthesis, measure through an optical positioning probe and calculate the actual length of the femoral neck required for the affected limb in the optical positioning system, so that medical staff can know the actual effect produced by the preselected prosthesis combination when performing the implantation action during the operation.

[0055] A number of optical positioning balls are fixed on the optical positioning probe. The measurement principle of the optical positioning probe is to use an optical sensor to track the optical positioning balls from different angles, and then determine the three-dimensional coordinate positions of the optical positioning balls in space. When the optical positioning probe with optical positioning balls is placed under the optical positioning system, use each optical positioning ball to locate the position of the probe tip, realize the end tracking of the optical positioning probe, determine the three-dimensional coordinates of the end of the optical positioning probe, and then determine the three-dimensional coordinates of the point to be measured.

[0056] Step S200. Determine the selected femoral head prosthesis and femoral neck prosthesis according to the calculated actual length of the femoral neck and the length of the femoral neck of the healthy limb measured preoperatively.

[0057] According to the actual length of the femoral neck obtained from the above calculations, compare it with the length of the femoral neck of the healthy limb measured by CT before surgery. Medical staff can quickly grasp whether the installation effect of the preselected prosthesis combination before surgery can achieve the effect of making the lengths of the two limbs of the patient the same. If the overall error caused by the implantation error of the femoral stem prosthesis is within an acceptable range, the femoral head prosthesis and femoral neck prosthesis budgeted before surgery can be maintained. Otherwise, different models or sizes of femoral head prostheses and femoral neck prostheses need to be reselected.

[0058] Step S300. Measure the length of the affected limb after implanting the femoral head prosthesis and femoral neck prosthesis, and adjust the femoral neck length of the affected limb to constrain the length difference between the healthy limb and the affected limb.

[0059] After correcting the errors in the surgical process through the above steps, step S300 performs a secondary detection on the affected limb with the prosthesis implantation initially completed, compares the lengths of the affected limb and the healthy limb, and constrains the length difference between the healthy limb and the affected limb within a reasonable error range to improve the surgical quality. Among them, the core idea of constraining the length difference between the healthy limb and the affected limb is to adjust the femoral neck length of the affected limb, which is achieved by reselecting the femoral head prosthesis and / or femoral neck prosthesis.

[0060] In this way, by using the optical measurement technology in total hip arthroplasty to measure and calculate the errors caused by surgical operations, the actual effect achieved during the surgical execution can be determined in a relatively simple scenario, so that medical staff can timely adjust the selected prosthesis according to each stage of the surgery to improve the surgical quality.

[0061] Refer to Figure 3 , Figure 3 is a flowchart of the method of step S100 shown according to an embodiment. As Figure 3 shown, the method includes the following steps S110 to step S130.

[0062] Step S110. Use an optical probe to measure three non-collinear reference points on the osteotomy surface of the affected limb respectively to determine the coordinates of the three reference points.

[0063] Step S120. Pre-install the femoral head prosthesis and femoral neck prosthesis selected before surgery, and use an optical probe to measure the measurement point of the femoral head prosthesis far from the osteotomy surface to determine the coordinates of the measurement point of the femoral head prosthesis.

[0064] Step S130. Determine the plane position where the osteotomy surface of the affected limb is located according to the coordinates of the three reference points, calculate the distance between the osteotomy surface of the affected limb and the measurement point of the femoral head prosthesis, and determine the actual length of the femoral neck in combination with the size of the femoral neck prosthesis.

[0065] This embodiment provides a method for measuring and calculating the actual length of the femoral neck.

[0066] In step S110, the coordinates of three reference points are measured and determined using an optical positioning probe, and are respectively represented as (x1, y1, z1), (x2, y2, z2), and (x3, y3, z3).

[0067] In step S120, after a preselected femoral ball prosthesis and a femoral neck prosthesis are installed on the osteotomy surface of the femoral stem prosthesis, as Figure 2 shown, the measurement point selected on the femoral ball prosthesis is a point within the area away from the femoral neck prosthesis, and the measurement point is the point on the femoral ball prosthesis that is farthest from the femoral neck prosthesis.

[0068] In step S130, the coordinate values of the three reference points are substituted into the plane formula of the osteotomy surface of the affected limb for solution.

[0069] After substituting the coordinates (x1, y1, z1), (x2, y2, z2), and (x3, y3, z3) of the three reference points into the plane formula of the osteotomy surface of the affected limb, the representation of the osteotomy surface of the affected limb in the optical positioning system is obtained. The plane formula of the osteotomy surface of the affected limb is:

[0070] ax + by + cz + d = 0

[0071] In the formula, a, b, c, and d are all constants, and x, y, and z respectively represent the coordinate values of the points on the osteotomy surface of the affected limb.

[0072] The distance calculation formula is used to calculate the distance between the osteotomy surface of the affected limb and the measurement point.

[0073] The distance calculation formula is:

[0074]

[0075] In the formula, x4, y4, and z4 respectively represent the three coordinate values of the measurement point, and e represents the distance between the osteotomy surface of the affected limb and the measurement point.

[0076] The radius length of the preselected femoral ball prosthesis is subtracted from the distance between the osteotomy surface of the affected limb and the measurement point to obtain the actual length of the femoral neck.

[0077] Refer to Figure 4 , Figure 4 is a flowchart of the method of step S200 shown according to an embodiment. As Figure 4 shown, the method includes the following steps S210 to step S220.

[0078] Step S210. Select the femoral neck prosthesis again based on the actual length of the femoral neck and the femoral neck length of the healthy limb.

[0079] Step S220. Determine the size of the femoral ball prosthesis according to the size of the selected femoral neck prosthesis and the length of the femoral neck of the healthy limb, and select the final femoral ball prosthesis.

[0080] In this embodiment, when the length difference between the actual length of the femoral neck and the length of the femoral neck of the healthy limb is too large, select a suitable femoral neck prosthesis again so that the length of the femoral neck prosthesis of the affected limb is approximately the same as the length of the femoral neck of the healthy limb. On this basis, determine the finally selected femoral ball prosthesis again so that the lengths of the affected limb and the healthy limb at the same position are the same after assembling the prosthesis.

[0081] When selecting the femoral ball prosthesis, since the femoral ball prosthesis has various different models, and the connection depth and radius of each model are different from those of the femoral neck prosthesis, it may cause a deviation in the length of the femoral neck of the affected limb. In this embodiment, a preset femoral ball prosthesis database is used to record the parameters of each model of the femoral ball prosthesis, the size of the selected femoral neck prosthesis is input into the preset femoral ball prosthesis database, and the femoral ball prosthesis is selected from the femoral ball prosthesis models output from the database.

[0082] Refer to Figure 5 , Figure 5 is a flowchart of the method of step S300 shown according to an embodiment. As Figure 5 shown, the method includes the following steps S310 to S330.

[0083] Step S310. After implanting the femoral ball prosthesis and the femoral neck prosthesis into the affected limb, measure the length between the anterior superior iliac spine and the sole of the affected limb to obtain the length of the affected limb.

[0084] Step S320. Compare the length of the affected limb with the length of the healthy limb measured before the operation to determine the length difference between the healthy limb and the affected limb.

[0085] Step S330. Determine whether the length difference between the affected limb and the healthy limb exceeds the set value of limb length inequality. If it exceeds, replace the femoral ball prosthesis and / or the femoral neck prosthesis so that the difference between the length of the affected limb and the length of the healthy limb is within the range of the set value of limb length inequality.

[0086] With the assistance of a non-image surgical navigation system based on the principle of optical positioning, after the medical staff install the prosthesis according to the measurement parameters, they can use a probe to measure the lengths of the patient's lower limbs in real time and make adjustments according to the real-time feedback information. The lengths of the affected limb and the healthy limb are determined by measuring the length between the anterior superior iliac spine and the sole of the foot respectively, and then it is determined whether the length difference between the two limbs exceeds the set value of limb length inequality.

[0087] Among them, the set value of limb length inequality is 10 mm. Clinically, limb length inequality is defined as: limb difference > 10 mm. If the length difference between the corresponding two limbs is greater than 10 mm, the femoral neck length of the prosthesis needs to be adjusted until the error is within the allowable range.

[0088] Refer to Figure 6 , Figure 6 which is a structural block diagram of a femoral neck measurement system based on optical positioning shown according to an embodiment. As Figure 6 shown, the system includes:

[0089] A detection module 610, configured to measure the affected limb after installing the femoral stem prosthesis through an optical positioning probe, and calculate the actual length of the femoral neck required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis;

[0090] A first adjustment module 620, configured to determine the selected femoral head prosthesis and femoral neck prosthesis according to the calculated actual length of the femoral neck and the length of the femoral neck of the healthy limb measured before surgery;

[0091] A second adjustment module 630, configured to measure the length of the affected limb after implanting the femoral head prosthesis and the femoral neck prosthesis, and constrain the length difference between the healthy limb and the affected limb by adjusting the femoral neck length of the affected limb.

[0092] The femoral neck measurement system based on optical positioning executes the femoral neck measurement method based on optical positioning in the first aspect above. For the specific limitations on the femoral neck measurement system based on optical positioning, reference can be made to the limitations on the femoral neck measurement method based on optical positioning in the above text, which will not be elaborated here.

[0093] Each module in the above-mentioned femoral neck measurement system based on optical positioning can be implemented in whole or in part by software, hardware, and their combination. The above-mentioned modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above-mentioned modules.

[0094] According to the third aspect of the present invention, a computer device is provided.

[0095] Refer to Figure 7 , Figure 7 which is an internal structure diagram of a computer device shown according to an embodiment. As Figure 7 shown, the computer device includes a processor, a memory, and a database connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. When the computer program is executed by the processor, it implements the femoral neck measurement method based on optical positioning described in the first aspect.

[0096] The memory and the processor components are electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The processor is used to process measurement data and output calculation results. The processor includes at least one software function module that can be stored in the memory in the form of software or firmware or solidified in the operating system (OS) of the server. The processor is used to execute the executable module stored in the memory.

[0097] The memory may be a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable read-only memory (EEPROM), etc. The memory is used to store programs and voice data, and the processor executes the program after receiving the execution instruction.

[0098] The processor may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0099] The processor couples various input / output devices to the processor and the memory. In some embodiments, the processor and the memory can be implemented in a single chip. In some other examples, they can be implemented by independent chips respectively.

[0100] The peripheral interface couples various input / output devices to the processor and the memory. In some embodiments, the peripheral interface, the processor and the memory can be implemented in a single chip. In some other examples, they can be implemented by separate chips respectively.

[0101] According to a fourth aspect of the present invention, there is also provided a computer storage medium, in which a computer program is stored. The computer storage medium may be a magnetic random access memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory, etc.; it may also be various devices including one or any combination of the above memories, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc. When the computer program is executed by a processor, it implements a femoral neck measurement method based on optical positioning described in the first aspect.

[0102] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0103] In this text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the elements listed, it may also include other elements not specifically listed.

[0104] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A femoral neck measurement system based on optical positioning, characterized in that Including: A detection module, configured to measure the affected limb after installing the femoral stem prosthesis through an optical positioning probe, and calculate the actual length of the femoral neck required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis; A first adjustment module, configured to determine the selected femoral head prosthesis and femoral neck prosthesis according to the actual length of the femoral neck obtained by calculation and the length of the femoral neck of the healthy limb measured before surgery; A second adjustment module, configured to measure the length of the affected limb after implanting the femoral head prosthesis and the femoral neck prosthesis, and constrain the length difference between the healthy limb and the affected limb by adjusting the femoral neck length of the affected limb; Wherein, the measurement of the affected limb after installing the femoral stem prosthesis through the optical positioning probe, and the calculation of the actual length of the femoral neck required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis, includes: Using the optical probe to measure three non-collinear reference points on the osteotomy surface of the affected limb respectively, and determining the coordinates of the three reference points; Pre-installing the femoral head prosthesis and femoral neck prosthesis selected before surgery, and using the optical probe to measure the measurement point of the femoral head prosthesis away from the osteotomy surface, and determining the coordinates of the measurement point of the femoral head prosthesis; Determining the plane position where the osteotomy surface of the affected limb is located according to the coordinates of the three reference points, calculating the distance between the osteotomy surface of the affected limb and the measurement point of the femoral head prosthesis, and determining the actual length of the femoral neck in combination with the size of the femoral neck prosthesis; Wherein, the determining the plane position where the osteotomy surface of the affected limb is located according to the coordinates of the three reference points, calculating the distance between the osteotomy surface of the affected limb and the measurement point of the femoral head prosthesis, and determining the actual length of the femoral neck in combination with the size of the femoral neck prosthesis, includes: Substituting the coordinate value variables of the three reference points into the plane formula of the osteotomy surface of the affected limb for solution; The plane formula of the osteotomy surface of the affected limb is: In the formula, a, b, c, and d are all constants, and x, y, and z respectively represent the coordinate values of the points on the osteotomy surface of the affected limb; Using the distance calculation formula to calculate the distance between the osteotomy surface of the affected limb and the measurement point; The distance calculation formula is: In the formula, x4, y4, and z4 respectively represent the three coordinate values of the measurement point, and e represents the distance between the osteotomy surface of the affected limb and the measurement point; Subtracting the radius length of the preselected femoral head prosthesis from the distance between the osteotomy surface of the affected limb and the measurement point to obtain the actual length of the femoral neck.

2. A computer device, characterized in that, Including: A memory, storing a computer program; A processor, when the processor executes the computer program, implements a method for measuring the femoral neck based on optical positioning, and the method includes: Measuring the affected limb after installing the femoral stem prosthesis through an optical positioning probe, and calculating the actual length of the femoral neck required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis; Determining the selected femoral head prosthesis and femoral neck prosthesis according to the actual length of the femoral neck obtained by calculation and the length of the femoral neck of the healthy limb measured before surgery; Measuring the length of the affected limb after implanting the femoral head prosthesis and the femoral neck prosthesis, and constraining the length difference between the healthy limb and the affected limb by adjusting the femoral neck length of the affected limb; Wherein, the measurement of the affected limb after installing the femoral stem prosthesis through the optical positioning probe, and the calculation of the actual length of the femoral neck required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis, includes: Use an optical probe to measure three non - collinear reference points on the osteotomy surface of the affected limb respectively to determine the coordinates of the three reference points; Pre - install the femoral ball prosthesis and femoral neck prosthesis selected before the operation. Use an optical probe to measure the measurement point of the femoral ball prosthesis far from the osteotomy surface to determine the coordinates of the measurement point of the femoral ball prosthesis; Determine the plane position of the osteotomy surface of the affected limb according to the coordinates of the three reference points, calculate the distance between the osteotomy surface of the affected limb and the measurement point of the femoral ball prosthesis, and determine the actual length of the femoral neck in combination with the size of the femoral neck prosthesis; Among them, the determining the plane position of the osteotomy surface of the affected limb according to the coordinates of the three reference points, calculating the distance between the osteotomy surface of the affected limb and the measurement point of the femoral ball prosthesis, and determining the actual length of the femoral neck in combination with the size of the femoral neck prosthesis includes: Substitute the coordinate value variables of the three reference points into the plane formula of the osteotomy surface of the affected limb for solution; The plane formula of the osteotomy surface of the affected limb is: In the formula, a, b, c, and d are all constants, and x, y, and z respectively represent the coordinate values of the points on the osteotomy surface of the affected limb; Use the distance calculation formula to calculate the distance between the osteotomy surface of the affected limb and the measurement point; The distance calculation formula is: In the formula, x4, y4, and z4 respectively represent the three coordinate values of the measurement point, and e represents the distance between the osteotomy surface of the affected limb and the measurement point; Subtract the radius length of the pre - selected femoral ball prosthesis from the distance between the osteotomy surface of the affected limb and the measurement point to obtain the actual length of the femoral neck.

3. A computer storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements a femoral neck measurement method based on optical positioning. The method includes: Measure the affected limb after installing the femoral stem prosthesis through an optical positioning probe, and calculate the actual length of the femoral neck required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis; Determine the selected femoral ball prosthesis and femoral neck prosthesis according to the calculated actual length of the femoral neck and the length of the femoral neck of the healthy limb measured before the operation; Measure the length of the affected limb after implanting the femoral ball prosthesis and femoral neck prosthesis, and adjust the femoral neck length of the affected limb to constrain the length difference between the healthy limb and the affected limb; Among them, the measuring the affected limb after installing the femoral stem prosthesis through an optical positioning probe and calculating the actual length of the femoral neck required for the affected limb according to the osteotomy surface of the affected limb determined after installing the femoral stem prosthesis includes: Use an optical probe to measure three non - collinear reference points on the osteotomy surface of the affected limb respectively to determine the coordinates of the three reference points; Pre - install the femoral ball prosthesis and femoral neck prosthesis selected before the operation. Use an optical probe to measure the measurement point of the femoral ball prosthesis far from the osteotomy surface to determine the coordinates of the measurement point of the femoral ball prosthesis; Determine the plane position of the osteotomy surface of the affected limb according to the coordinates of the three reference points, calculate the distance between the osteotomy surface of the affected limb and the measurement point of the femoral ball prosthesis, and determine the actual length of the femoral neck in combination with the size of the femoral neck prosthesis; Among them, the determining the plane position of the osteotomy surface of the affected limb according to the coordinates of the three reference points, calculating the distance between the osteotomy surface of the affected limb and the measurement point of the femoral ball prosthesis, and determining the actual length of the femoral neck in combination with the size of the femoral neck prosthesis includes: Substitute the coordinate value variables of the three reference points into the plane formula of the osteotomy surface of the affected limb for solution; The plane formula of the osteotomy surface of the affected limb is: Wherein, a, b, c, and d are all constants, and x, y, and z respectively represent the coordinate values of the points on the osteotomy surface of the affected limb; Calculate the distance between the osteotomy surface of the affected limb and the measurement point using the distance calculation formula; The distance calculation formula is: Wherein, x4, y4, and z4 respectively represent the three coordinate values of the measurement point, and e represents the distance between the osteotomy surface of the affected limb and the measurement point; Subtract the radius length of the preselected femoral ball prosthesis from the distance between the osteotomy surface of the affected limb and the measurement point to obtain the actual length of the femoral neck.

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