Method and apparatus for determining preoperative planning scenarios based on intervertebral fusion cages

Abstract

The application discloses a kind of based on intervertebral fusion ware preoperative planning scheme determination method and device, it is related to medical technical field, the method comprises the following steps: obtaining the CT image of target object, wherein the bone image of the spine of target object is included in CT image;The elastic modulus of the bone segment in CT image is calculated, the first elastic modulus corresponding to the bone segment is obtained, and the distance between the bone segment in CT image is calculated, to obtain target distance value;According to the first elastic modulus corresponding to the bone segment and target distance value, the second elastic modulus of intervertebral fusion ware and the height value of intervertebral fusion ware are determined;According to the second elastic modulus and height value, the preoperative planning scheme of intervertebral fusion ware is determined.By the application, it solves the problem that the preoperative planning scheme of intervertebral fusion ware is determined by relying on the anatomical and pathological knowledge of doctor in the related art, which leads to the problem that the efficiency of determining the preoperative planning scheme is relatively low.

Description

Technical Field

[0001] This application relates to the field of medical technology, and more specifically, to a method and apparatus for determining a preoperative planning scheme based on an interbody fusion device. Background Technology

[0002] In recent years, with the improvement of medical standards, surgeries such as spinal fracture removal, foreign body removal, and spinal curvature surgery have effectively alleviated patients' pain. However, traditional surgery relies on the physician's anatomical and pathological knowledge to plan the preoperative procedure for interbody fusion (including the location, size, surgical method, surgical process, surgical incision and path of the interbody fusion device). However, physicians with different experience may make different judgments, making it difficult to ensure consistent results. Furthermore, manually developing preoperative planning methods severely impacts the efficiency of determining the optimal preoperative plan.

[0003] There is currently no effective solution to the problem that the preoperative planning of interbody fusion devices relies on doctors' knowledge of anatomy and pathology, which leads to low efficiency in determining the preoperative planning scheme. Summary of the Invention

[0004] The main objective of this application is to provide a method and apparatus for determining the preoperative planning scheme based on the interbody fusion device, so as to solve the problem that the determination of the preoperative planning scheme of the interbody fusion device relies on the doctor's anatomical and pathological knowledge in related technologies, resulting in low efficiency in determining the preoperative planning scheme.

[0005] To achieve the above objectives, according to one aspect of this application, a method for determining a preoperative planning scheme based on an interbody fusion device is provided. The method includes: acquiring a CT image of a target object, wherein the CT image includes a skeletal image of the target object's spine; calculating the elastic modulus of the skeletal segments in the CT image to obtain a first elastic modulus corresponding to each skeletal segment, and calculating the distance between the skeletal segments in the CT image to obtain a target distance value; determining a second elastic modulus of the interbody fusion device and a height value of the interbody fusion device based on the first elastic modulus corresponding to each skeletal segment and the target distance value; and determining a preoperative planning scheme for the interbody fusion device based on the second elastic modulus and the height value.

[0006] Further, before calculating the elastic modulus of the bone segments in the CT image to obtain the first elastic modulus corresponding to the bone segment, the method includes: obtaining a preset first target range, wherein the first target range is the range of the interbody fusion device to be implanted; cropping the CT image according to the preset first target range to obtain a cropped CT image; segmenting the cropped CT image according to the bone segments in the cropped CT image to obtain a CT image corresponding to each bone segment; and performing three-dimensional reconstruction based on the CT image corresponding to each bone segment to obtain a three-dimensional model corresponding to each bone segment.

[0007] Further, calculating the elastic modulus of the bone segments in the CT image to obtain the first elastic modulus corresponding to the bone segment includes: determining the volume data corresponding to each bone segment based on the three-dimensional model corresponding to each bone segment; and calculating the first elastic modulus based on the volume data corresponding to each bone segment and the Hu value corresponding to each bone segment.

[0008] Further, the calculation of the first elastic modulus based on the volume data and Hu value of each bone segment includes: based on the preset shape and the volume data of each bone segment, the sagittal plane and the coronal plane of each bone segment are cut to obtain the second target range; the first elastic modulus is calculated based on the Hu value of each pixel point of each bone segment within the second target range.

[0009] Further, the calculation of the first elastic modulus based on the Hu value of each pixel point of each skeletal segment within the second target range includes: obtaining the Hu value of each pixel point of each skeletal segment within the second target range; calculating the average value based on the Hu value of each pixel point to obtain an average Hu value; calculating the product of the average Hu value and a first value to obtain a target product value; and calculating the difference between the target product value and a second value to obtain the first elastic modulus.

[0010] Further, calculating the distance between bone segments in the CT image to obtain the target distance value includes: obtaining the target three-dimensional model corresponding to the first target range based on the three-dimensional model corresponding to each bone segment; determining the center point position between any two adjacent first bone segments and second bone segments in the target three-dimensional model; and measuring the distance between the first bone segment and the second bone segment based on the center point position to obtain the target distance value.

[0011] Further, determining the second elastic modulus of the interbody fusion device and the height of the interbody fusion device based on the first elastic modulus corresponding to the bone segment and the target distance value includes: determining any pair of target bone segments to be implanted with the interbody fusion device, wherein the target bone segment pair consists of two adjacent bone segments; obtaining the target distance value corresponding to the target bone segment pair and the first elastic modulus corresponding to the lower bone segment in the target bone segment pair; determining the height value of the interbody fusion device corresponding to the target bone segment pair based on the target distance value corresponding to the target bone segment pair; and determining the second elastic modulus of the interbody fusion device corresponding to the target bone segment pair based on the first elastic modulus corresponding to the lower bone segment in the target bone segment pair.

[0012] To achieve the above objectives, according to another aspect of this application, a device for determining a preoperative planning scheme based on an interbody fusion device is provided. The device includes: a first acquisition unit for acquiring CT images of a target object, wherein the CT images include skeletal images of the spine of the target object; a calculation unit for calculating the elastic modulus of the skeletal segments in the CT images to obtain a first elastic modulus corresponding to the skeletal segments, and calculating the distance between the skeletal segments in the CT images to obtain a target distance value; a first determination unit for determining a second elastic modulus of the interbody fusion device and a height value of the interbody fusion device based on the first elastic modulus corresponding to the skeletal segments and the target distance value; and a second determination unit for determining a preoperative planning scheme for the interbody fusion device based on the second elastic modulus and the height value.

[0013] Further, the device includes: a second acquisition unit, configured to acquire a preset first target range before calculating the elastic modulus of the bone segments in the CT image to obtain the first elastic modulus corresponding to the bone segments, wherein the first target range is the range of the interbody fusion device to be implanted; a cropping unit, configured to crop the CT image according to the preset first target range to obtain a cropped CT image; a segmentation unit, configured to segment the cropped CT image according to the bone segments in the cropped CT image to obtain a CT image corresponding to each bone segment; and a reconstruction unit, configured to perform three-dimensional reconstruction based on the CT image corresponding to each bone segment to obtain a three-dimensional model corresponding to each bone segment.

[0014] Furthermore, the calculation unit includes: a first determining subunit, used to determine the volume data corresponding to each bone segment based on the three-dimensional model corresponding to each bone segment; and a second determining subunit, used to calculate the first elastic modulus based on the volume data corresponding to each bone segment and the Hu value corresponding to each bone segment.

[0015] Furthermore, the second determining subunit includes: a cutting module, used to cut in the sagittal plane and the coronal plane of each bone segment according to a preset shape and the volume data corresponding to each bone segment to obtain a second target range; and a calculation module, used to calculate the first elastic modulus based on the Hu value of each pixel point of each bone segment within the second target range.

[0016] Further, the calculation module includes: a first acquisition submodule, used to acquire the Hu value of each pixel point of each skeletal segment within a second target range; a first calculation submodule, used to calculate the average Hu value based on the Hu value of each pixel point; a second calculation submodule, used to calculate the product of the average Hu value and a first value to obtain a target product value; and a third calculation submodule, used to calculate the difference between the target product value and the second value to obtain the first elastic modulus.

[0017] Further, the calculation unit includes: a third determining subunit, used to obtain a target three-dimensional model corresponding to the first target range based on the three-dimensional model corresponding to each bone segment; a fourth determining subunit, used to determine the center point position between any two adjacent first bone segments and second bone segments in the target three-dimensional model; and a measuring subunit, used to measure the distance between the first bone segment and the second bone segment based on the center point position to obtain the target distance value.

[0018] Further, the first determining unit includes: a fifth determining subunit, used to determine any pair of target bone segments to be implanted with the interbody fusion device, wherein the target bone segment pair consists of two adjacent bone segments; an acquiring subunit, used to acquire the target distance value corresponding to the target bone segment pair and the first elastic modulus corresponding to the lower bone segment in the target bone segment pair; a sixth determining subunit, used to determine the height value of the interbody fusion device corresponding to the target bone segment pair based on the target distance value corresponding to the target bone segment pair; and a seventh determining subunit, used to determine the second elastic modulus of the interbody fusion device corresponding to the target bone segment pair based on the first elastic modulus corresponding to the lower bone segment in the target bone segment pair.

[0019] To achieve the above objectives, according to one aspect of this application, a computer-readable storage medium is provided, the storage medium storing a program, wherein, when the program is executed, the device where the storage medium is located is controlled to execute the method for determining a preoperative planning scheme based on an interbody fusion device as described above.

[0020] To achieve the above objectives, according to another aspect of this application, an electronic device is also provided, the electronic device including one or more processors and a memory, the memory being used to store the method for determining the preoperative planning scheme based on the interbody fusion device as described in any one of the above-mentioned methods implemented by the one or more processors.

[0021] This application employs the following steps: acquiring CT images of the target object, including skeletal images of the target object's spine; calculating the elastic modulus of the skeletal segments in the CT images to obtain the first elastic modulus corresponding to each skeletal segment, and calculating the distance between the skeletal segments in the CT images to obtain target distance values; determining the second elastic modulus and height of the interbody fusion cage based on the first elastic modulus and target distance values; and determining the preoperative planning scheme for the interbody fusion cage based on the second elastic modulus and height values. This solves the problem in related technologies where the preoperative planning scheme for the interbody fusion cage relies on the doctor's anatomical and pathological knowledge, resulting in low efficiency. In this solution, the first elastic modulus corresponding to each skeletal segment and the distance between skeletal segments are calculated from the target object's CT images. Then, the second elastic modulus and height of the interbody fusion cage are determined using the first elastic modulus and target distance values, thereby obtaining the preoperative planning scheme for the interbody fusion cage. This avoids manually formulating the preoperative planning scheme for the interbody fusion cage, thus improving the efficiency of determining the preoperative planning scheme. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a flowchart of a method for determining a preoperative planning scheme based on an interbody fusion device, according to an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the skeletal nodes of the spine according to an embodiment of this application. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the skeletal nodes of the spine according to an embodiment of this application. Figure 2 ;

[0026] Figure 4 This is a flowchart of a method for determining an optional preoperative planning scheme based on an interbody fusion cage, according to an embodiment of this application.

[0027] Figure 5This is a schematic diagram of a device for determining a preoperative planning scheme based on an interbody fusion cage, according to an embodiment of this application.

[0028] Figure 6 This is a schematic diagram of an electronic device provided according to an embodiment of this application. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] For ease of description, the following explains some of the nouns or terms used in the embodiments of this application:

[0033] Interbody fusion device: used for interbody fusion of the spine.

[0034] Hu value: also known as CT value, is a dose unit used to measure the density of a local tissue or organ in the human body, reflecting the degree to which the tissue absorbs X-rays.

[0035] Elastic modulus. The elastic modulus is the proportionality constant between longitudinal stress and longitudinal strain acting on a material within its elastic deformation range (i.e., within the proportional limit). It is also often referred to as the ratio of the stress (such as tension, compression, bending, torsion, shear, etc.) on a material to the corresponding strain produced by the material.

[0036] It should be noted that all information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data used for analysis, etc.) involved in this disclosure are information and data authorized by the user or fully authorized by all parties. For example, this system has an interface with the relevant user or organization. Before obtaining relevant information, it is necessary to send an acquisition request to the aforementioned user or organization through the interface, and obtain the relevant information after receiving consent from the aforementioned user or organization.

[0037] The present invention will now be described in conjunction with preferred implementation steps. Figure 1 This is a flowchart of a method for determining a preoperative planning scheme based on an interbody fusion cage, according to an embodiment of this application. Figure 1 As shown, the method includes the following steps:

[0038] Step S101: Obtain a CT image of the target object, wherein the CT image includes a skeletal image of the spine of the target object.

[0039] Optionally, the target patient for the interbody fusion device to be implanted is identified, and CT images of the target patient are acquired. It should be noted that the CT images must include skeletal images of the target patient's spine.

[0040] Step S102: Calculate the elastic modulus of the bone segments in the CT image to obtain the first elastic modulus corresponding to the bone segments, and calculate the distance between the bone segments in the CT image to obtain the target distance value.

[0041] Optionally, the elastic modulus of the bone segments in the CT images and the distance between the bone segments in the CT images are calculated to obtain the first elastic modulus and the target distance value mentioned above.

[0042] Step S103: Based on the first elastic modulus corresponding to the bone segment and the target distance value, determine the second elastic modulus of the interbody fusion device and the height value of the interbody fusion device.

[0043] Optionally, the second elastic modulus and the height of the interbody fusion cage are determined based on the calculated first elastic modulus and the target distance value. For example, if the calculated elastic modulus of the L1 bone segment is 0.153 MPa and the elastic modulus of the L2 bone segment is 0.261 MPa, and the calculated distance between the L1 and L2 bone segments is 15 mm, then based on the elastic modulus of the L2 bone segment and the distance between the L1 and L2 bone segments (15 mm), the height of the interbody fusion cage between the L1 and L2 bone segments to be implanted is determined to be 15 mm, and the elastic modulus of the interbody fusion cage is determined to be 500 Pa closest to 0.261 MPa.

[0044] Step S104: Determine the preoperative planning scheme for the interbody fusion device based on the second elastic modulus and height value.

[0045] Optionally, the preoperative planning scheme for the interbody fusion device can be obtained based on the second elastic modulus and the height of the interbody fusion device.

[0046] In summary, this approach calculates the first elastic modulus of the bone segments and the distance between bone segments using CT images of the target object. Then, it determines the second elastic modulus and height of the interbody fusion device using the first elastic modulus and the target distance value, thereby obtaining a preoperative planning scheme for the interbody fusion device. This avoids the need for manual preoperative planning, thus improving the efficiency of determining the preoperative planning scheme.

[0047] Optionally, in the method for determining the preoperative planning scheme based on the interbody fusion device provided in the embodiments of this application, before calculating the elastic modulus of the bone segments in the CT image to obtain the first elastic modulus corresponding to the bone segment, the method includes: obtaining a preset first target range, wherein the first target range is the range of the interbody fusion device to be implanted; cropping the CT image according to the preset first target range to obtain a cropped CT image; segmenting the cropped CT image according to the bone segments in the cropped CT image to obtain a CT image corresponding to each bone segment; and performing three-dimensional reconstruction based on the CT image corresponding to each bone segment to obtain a three-dimensional model corresponding to each bone segment.

[0048] Optionally, to improve the accuracy of elastic modulus calculation for bone segments in CT images, before calculating the elastic modulus of bone segments in CT images, the area where the interbody fusion device needs to be implanted is determined, i.e., the aforementioned first target area is obtained. A segmentation area is then selected on the sagittal plane of the target object's CT image using the first target area, and the CT image is cropped to obtain a cropped CT image. Then, each bone segment in the cropped CT image is segmented to obtain a CT image corresponding to each bone segment. Finally, three-dimensional reconstruction is performed using the CT images corresponding to each bone segment to obtain a three-dimensional model corresponding to each bone segment.

[0049] In an optional embodiment, a schematic diagram of selecting a segmentation range on the sagittal plane of the CT image of the target object by means of a first target range is shown below. Figure 2As shown, the segmentation area is selected on the sagittal plane of the patient's CT image. Two vertical lines are displayed on either side of the selected area. Starting from the left vertical line and drawing lines to the right, the line segments pass between two segments of the spine. This process is repeated to segment all necessary segments. The CT image is then segmented into CT images corresponding to each bone segment. Finally, a three-dimensional skeleton is reconstructed from each CT segment.

[0050] It should be noted that, in order to facilitate the calculation of the elastic modulus of each bone segment, each bone segment is labeled, for example, such as... Figure 2 In the middle, there are the L1 skeletal segment, L2 skeletal segment, L3 skeletal segment, and L4 skeletal segment.

[0051] By segmenting skeletal segments, we can more accurately reconstruct skeletal nodes in 3D, thereby improving the accuracy of subsequent calculations of elasticity models and distance values.

[0052] Optionally, in the method for determining the preoperative planning scheme based on the interbody fusion device provided in the embodiments of this application, calculating the elastic modulus of the bone segments in the CT image to obtain the first elastic modulus corresponding to the bone segment includes: determining the volume data corresponding to each bone segment based on the three-dimensional model corresponding to each bone segment; and calculating the first elastic modulus based on the volume data corresponding to each bone segment and the Hu value corresponding to each bone segment.

[0053] Optionally, the calculation of the elastic modulus of a skeletal segment includes determining the volume data corresponding to each skeletal segment using a three-dimensional model corresponding to each skeletal segment, accurately obtaining the Hu value corresponding to the skeletal segment based on the volume data, and then calculating the first elastic modulus corresponding to the skeletal segment based on the Hu value.

[0054] Optionally, in the method for determining the preoperative planning scheme based on the interbody fusion device provided in this application embodiment, the calculation of the first elastic modulus based on the volume data and Hu value corresponding to each bone segment includes: based on the preset shape and the volume data corresponding to each bone segment, the sagittal plane and the coronal plane of each bone segment are cut to obtain the second target range; the first elastic modulus is calculated based on the Hu value of each pixel point of each bone segment within the second target range.

[0055] Optionally, to further improve the accuracy of the first elastic modulus, the calculation based on the volume data corresponding to each bone segment and the Hu value corresponding to each bone segment includes: determining a preset shape, such as a square; and selecting a bounding box in the sagittal and coronal planes of each bone segment based on the volume data corresponding to each bone segment, for example, as shown in the figure. Figure 3The square frame shown is used to define the second target range. Finally, the first elastic modulus is calculated based on the Hu value of each pixel within the second target range for each skeletal segment.

[0056] Optionally, in the method for determining the preoperative planning scheme based on the interbody fusion device provided in the embodiments of this application, the calculation of the first elastic modulus based on the Hu value of each pixel point in the second target range for each bone segment includes: obtaining the Hu value of each pixel point in the second target range for each bone segment; calculating the average value based on the Hu value of each pixel point to obtain the average Hu value; calculating the product of the average Hu value and the first value to obtain the target product value; and calculating the difference between the target product value and the second value to obtain the first elastic modulus.

[0057] Optionally, after determining the second target range, the Hu value of each pixel in this skeletal segment within the second target range is obtained, and then the average value of these Hu values ​​is calculated to obtain the average Hu value. The product of the average Hu value and the first value (e.g., 0.98) is calculated, and finally the difference between the target product value and the second value (e.g., 50) is calculated to obtain the first elastic modulus.

[0058] In an optional embodiment, the first elastic modulus described above can be calculated using the following formula (1):

[0059] Elastic modulus = Average Hu value * 0.95 - 50 (1)

[0060] Optionally, in the method for determining the preoperative planning scheme based on the interbody fusion device provided in the embodiments of this application, calculating the distance between bone segments in the CT image to obtain the target distance value includes: obtaining the target three-dimensional model corresponding to the first target range based on the three-dimensional model corresponding to each bone segment; determining the center point position between any two adjacent first bone segments and second bone segments in the target three-dimensional model; and measuring the distance between the first bone segments and second bone segments based on the center point position to obtain the target distance value.

[0061] Optionally, to improve the accuracy of calculating the target distance, two adjacent first and second vertebral segments where the intervertebral fusion cage needs to be placed are located in the target 3D model. Then, the center point between the first and second vertebral segments is located in the target 3D model. It should be noted that this center point is also the location of the center point of the intervertebral fusion cage. Finally, the distance between the first and second vertebral segments is measured based on the center point location to obtain the target distance value. A line perpendicular to the two vertebral segments is determined based on this point. The target distance value is determined by calculating the distance from the lowest point of the previous vertebral segment on this line to the highest point of the next vertebral segment on this line. These steps improve the accuracy of calculating the target distance value.

[0062] Optionally, in the method for determining the preoperative planning scheme based on the interbody fusion device provided in this application embodiment, determining the second elastic modulus and the height value of the interbody fusion device based on the first elastic modulus and target distance value corresponding to the bone segments includes: determining any pair of target bone segments to be implanted with the interbody fusion device, wherein the target bone segment pair consists of two adjacent bone segments; obtaining the target distance value corresponding to the target bone segment pair and the first elastic modulus corresponding to the lower bone segment in the target bone segment pair; determining the height value of the interbody fusion device corresponding to the target bone segment pair based on the target distance value corresponding to the target bone segment pair; and determining the second elastic modulus of the interbody fusion device corresponding to the target bone segment pair based on the first elastic modulus corresponding to the lower bone segment in the target bone segment pair.

[0063] Optionally, determining the second elastic modulus and height of the interbody fusion cage includes the following steps: First, identify any pair of target bone segments into which the interbody fusion cage needs to be implanted. It should be noted that the target bone segment pair consists of two adjacent bone segments. Then, determine the target distance value corresponding to the target bone segment pair, and the first elastic modulus corresponding to the lower bone segment in the target bone segment pair. Finally, based on the first elastic modulus corresponding to the lower bone segment in the target bone segment pair, determine the second elastic modulus of the interbody fusion cage corresponding to the target bone segment pair, and determine the height of the interbody fusion cage based on the target distance value corresponding to the target bone segment pair.

[0064] In an alternative embodiment, the following can be employed: Figure 4 The flowchart shown illustrates the preoperative planning scheme for interbody fusion. Step 1, data import, involves importing the patient's CT images.

[0065] Step 2, Segmentation: Select the segmentation area on the sagittal plane of the patient's CT image. At this time, two vertical lines will be displayed on both sides of the selected area. Start drawing a line from the left vertical line to the right vertical line. The drawn line segment passes between two segments of the spine. Continue in this way to divide all the necessary segments.

[0066] Step 3: Reconstruction. The CT scan is divided into several segments based on the drawn lines. For each segment, a 3D skeleton is reconstructed in reverse. It should be noted that if the segmented CT scan does not meet the requirements, the segmentation and 3D reconstruction can be repeated.

[0067] Step 4: Labeling. Number the segmented bone segments.

[0068] Step 5: Elastic modulus prediction. Identify a specific bone segment and select a small square bounding box in the sagittal and coronal planes of that segment. The boxes in the sagittal and coronal planes can be adjusted as needed. Calculate the average Hu value corresponding to the bone segment within the selected area. Calculate the elastic modulus using the following formula: Elastic modulus = Hu value * 0.95 - 50. It should be noted that after calculating the Hu value, it's possible to determine if there are any anomalies. For example, if the Hu value is significantly lower than the standard value, a remeasurement can be performed.

[0069] Step 6: The fusion cage is determined by two parameters: the elastic modulus and the distance between the two bone segments. The elastic modulus of the interbody fusion cage is determined based on the elastic modulus of the bone segment beneath the selected segment. The method for calculating the distance between the two bone segments is as follows:

[0070] a) Select a center point between segments.

[0071] b) Based on this center point, determine a line perpendicular to the two vertebrae. The height of the intervertebral fusion cage is determined by calculating the distance from the lowest point of the upper segment to the highest point of the lower segment on this line.

[0072] Step 7: Place the interbody fusion cage described above in the 3D model, and finally save the plan to complete the preoperative planning. It should be noted that if the position and angle of the interbody fusion cage do not meet the requirements, manual fine-tuning can be performed.

[0073] The method for determining a preoperative planning scheme based on an interbody fusion device provided in this application embodiment involves acquiring CT images of the target object, including skeletal images of the target object's spine; calculating the elastic modulus of the skeletal segments in the CT images to obtain a first elastic modulus corresponding to each skeletal segment; calculating the distance between the skeletal segments in the CT images to obtain a target distance value; determining the second elastic modulus and the height value of the interbody fusion device based on the first elastic modulus corresponding to each skeletal segment and the target distance value; and determining the preoperative planning scheme for the interbody fusion device based on the second elastic modulus and the height value. This method solves the problem in related technologies where the preoperative planning scheme for the interbody fusion device relies on the doctor's anatomical and pathological knowledge, resulting in low efficiency in determining the preoperative planning scheme. In this approach, the first elastic modulus of the bone segments and the distance between the bone segments are calculated using CT images of the target object. Then, the second elastic modulus and the height of the interbody fusion device are determined using the first elastic modulus and the target distance value, thereby obtaining the preoperative planning scheme for the interbody fusion device. This avoids the need for manual formulation of the preoperative planning scheme for the interbody fusion device, thus improving the efficiency of determining the preoperative planning scheme.

[0074] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0075] This application also provides a device for determining a preoperative planning scheme based on an interbody fusion cage. It should be noted that this device can be used to execute the method provided in this application for determining a preoperative planning scheme based on an interbody fusion cage. The following describes the device for determining a preoperative planning scheme based on an interbody fusion cage provided in this application.

[0076] Figure 5 This is a schematic diagram of a device for determining a preoperative planning scheme based on an interbody fusion cage, according to an embodiment of this application. Figure 5 As shown, the device includes: a first acquisition unit 501, a calculation unit 502, a first determination unit 503, and a second determination unit 504.

[0077] The first acquisition unit 501 is used to acquire a CT image of the target object, wherein the CT image includes a skeletal image of the spine of the target object;

[0078] The calculation unit 502 is used to calculate the elastic modulus of bone segments in CT images to obtain the first elastic modulus corresponding to the bone segments, and to calculate the distance between bone segments in CT images to obtain the target distance value.

[0079] The first determining unit 503 is used to determine the second elastic modulus of the interbody fusion device and the height value of the interbody fusion device based on the first elastic modulus corresponding to the bone segment and the target distance value.

[0080] The second determining unit 504 is used to determine the preoperative planning scheme of the interbody fusion device based on the second elastic modulus and height value.

[0081] The device for determining a preoperative planning scheme based on an interbody fusion device provided in this application embodiment acquires a CT image of the target object through a first acquisition unit 501, wherein the CT image includes a skeletal image of the target object's spine; a calculation unit 502 calculates the elastic modulus of the skeletal segments in the CT image to obtain a first elastic modulus corresponding to the skeletal segments, and calculates the distance between the skeletal segments in the CT image to obtain a target distance value; a first determination unit 503 determines a second elastic modulus and a height value of the interbody fusion device based on the first elastic modulus corresponding to the skeletal segments and the target distance value; a second determination unit 504 determines a preoperative planning scheme for the interbody fusion device based on the second elastic modulus and the height value. This solves the problem in related technologies where the determination of a preoperative planning scheme for an interbody fusion device relies on the doctor's anatomical and pathological knowledge, resulting in low efficiency in determining the preoperative planning scheme. In this approach, the first elastic modulus of the bone segments and the distance between the bone segments are calculated using CT images of the target object. Then, the second elastic modulus and the height of the interbody fusion device are determined using the first elastic modulus and the target distance value, thereby obtaining the preoperative planning scheme for the interbody fusion device. This avoids the need for manual formulation of the preoperative planning scheme for the interbody fusion device, thus improving the efficiency of determining the preoperative planning scheme.

[0082] Optionally, in the device for determining the preoperative planning scheme based on the interbody fusion device provided in the embodiments of this application, the device includes: a second acquisition unit, used to acquire a preset first target range before calculating the elastic modulus of the bone segments in the CT image to obtain the first elastic modulus corresponding to the bone segment, wherein the first target range is the range of the interbody fusion device to be implanted; a cropping unit, used to crop the CT image according to the preset first target range to obtain a cropped CT image; a segmentation unit, used to segment the cropped CT image according to the bone segments in the cropped CT image to obtain a CT image corresponding to each bone segment; and a reconstruction unit, used to perform three-dimensional reconstruction based on the CT image corresponding to each bone segment to obtain a three-dimensional model corresponding to each bone segment.

[0083] Optionally, in the device for determining the preoperative planning scheme based on the interbody fusion device provided in the embodiments of this application, the calculation unit includes: a first determining subunit, used to determine the volume data corresponding to each bone segment based on the three-dimensional model corresponding to each bone segment; and a second determining subunit, used to calculate the first elastic modulus based on the volume data corresponding to each bone segment and the Hu value corresponding to each bone segment.

[0084] Optionally, in the device for determining the preoperative planning scheme based on the interbody fusion device provided in this application embodiment, the second determining subunit includes: a cutting module, used to cut in the sagittal plane and the coronal plane of each bone segment according to the preset shape and the volume data corresponding to each bone segment to obtain a second target range; and a calculation module, used to calculate the first elastic modulus based on the Hu value of each pixel point of each bone segment within the second target range.

[0085] Optionally, in the device for determining the preoperative planning scheme based on the interbody fusion device provided in this application embodiment, the calculation module includes: a first acquisition submodule, used to acquire the Hu value of each pixel point of each bone segment within a second target range; a first calculation submodule, used to calculate the average value based on the Hu value of each pixel point to obtain an average Hu value; a second calculation submodule, used to calculate the product of the average Hu value and a first value to obtain a target product value; and a third calculation submodule, used to calculate the difference between the target product value and the second value to obtain a first elastic modulus.

[0086] Optionally, in the device for determining the preoperative planning scheme based on the interbody fusion device provided in this application embodiment, the calculation unit includes: a third determining subunit, used to obtain the target three-dimensional model corresponding to the first target range based on the three-dimensional model corresponding to each bone segment; a fourth determining subunit, used to determine the center point position between any two adjacent first bone segments and second bone segments in the target three-dimensional model; and a measuring subunit, used to measure the distance between the first bone segments and second bone segments based on the center point position to obtain the target distance value.

[0087] Optionally, in the device for determining the preoperative planning scheme based on the interbody fusion device provided in this application embodiment, the first determining unit includes: a fifth determining subunit, used to determine any pair of target bone segments to be implanted with the interbody fusion device, wherein the target bone segment pair consists of two adjacent bone segments; an acquisition subunit, used to acquire the target distance value corresponding to the target bone segment pair and the first elastic modulus corresponding to the lower bone segment in the target bone segment pair; a sixth determining subunit, used to determine the height value of the interbody fusion device corresponding to the target bone segment pair based on the target distance value corresponding to the target bone segment pair; and a seventh determining subunit, used to determine the second elastic modulus of the interbody fusion device corresponding to the target bone segment pair based on the first elastic modulus corresponding to the lower bone segment in the target bone segment pair.

[0088] The device for determining the preoperative planning scheme based on the interbody fusion device includes a processor and a memory. The first acquisition unit 501, calculation unit 502, first determination unit 503 and second determination unit 504 mentioned above are all stored in the memory as program units. The processor executes the program units stored in the memory to realize the corresponding functions.

[0089] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and the preoperative planning for interbody fusion surgery can be achieved by adjusting kernel parameters.

[0090] The memory may include non-permanent memory in computer-readable media, such as 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.

[0091] This invention provides a computer-readable storage medium storing a program that, when executed by a processor, implements a method for determining a preoperative planning scheme based on an interbody fusion device.

[0092] This invention provides a processor for running a program, wherein the program executes a method for determining a preoperative planning scheme based on an interbody fusion device.

[0093] like Figure 6As shown, this embodiment of the invention provides an electronic device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs the following steps: acquiring a CT image of a target object, wherein the CT image includes a skeletal image of the spine of the target object; calculating the elastic modulus of the bone segments in the CT image to obtain a first elastic modulus corresponding to the bone segments, and calculating the distance between the bone segments in the CT image to obtain a target distance value; determining a second elastic modulus and a height value of the interbody fusion device based on the first elastic modulus corresponding to the bone segments and the target distance value; and determining a preoperative planning scheme for the interbody fusion device based on the second elastic modulus and the height value.

[0094] Optionally, before calculating the elastic modulus of the bone segments in the CT image to obtain the first elastic modulus corresponding to the bone segment, the method includes: obtaining a preset first target range, wherein the first target range is the range of the interbody fusion device to be implanted; cropping the CT image according to the preset first target range to obtain a cropped CT image; segmenting the cropped CT image according to the bone segments in the cropped CT image to obtain a CT image corresponding to each bone segment; and performing three-dimensional reconstruction based on the CT image corresponding to each bone segment to obtain a three-dimensional model corresponding to each bone segment.

[0095] Optionally, calculating the elastic modulus of bone segments in CT images to obtain the first elastic modulus corresponding to a bone segment includes: determining the volume data corresponding to each bone segment based on the three-dimensional model corresponding to each bone segment; and calculating the first elastic modulus based on the volume data corresponding to each bone segment and the Hu value corresponding to each bone segment.

[0096] Optionally, the calculation of the first elastic modulus based on the volume data and Hu value of each bone segment includes: extracting the sagittal and coronal planes of each bone segment according to the preset shape and the volume data of each bone segment to obtain a second target range; and calculating the first elastic modulus based on the Hu value of each pixel point of each bone segment within the second target range.

[0097] Optionally, calculating the first elastic modulus based on the Hu value of each pixel within the second target range for each skeletal segment includes: obtaining the Hu value of each pixel within the second target range for each skeletal segment; calculating the average Hu value based on the Hu value of each pixel; calculating the product of the average Hu value and a first value to obtain a target product value; and calculating the difference between the target product value and a second value to obtain the first elastic modulus.

[0098] Optionally, calculating the distance between bone segments in the CT image to obtain the target distance value includes: obtaining the target three-dimensional model corresponding to the first target range based on the three-dimensional model corresponding to each bone segment; determining the center point position between any two adjacent first and second bone segments in the target three-dimensional model; and measuring the distance between the first and second bone segments based on the center point position to obtain the target distance value.

[0099] Optionally, determining the second elastic modulus and height of the interbody fusion cage based on the first elastic modulus and target distance value corresponding to the bone segments includes: determining any pair of target bone segments for which the interbody fusion cage is to be implanted, wherein the target bone segment pair consists of two adjacent bone segments; obtaining the target distance value corresponding to the target bone segment pair and the first elastic modulus corresponding to the lower bone segment in the target bone segment pair; determining the height of the interbody fusion cage corresponding to the target bone segment pair based on the target distance value corresponding to the target bone segment pair; and determining the second elastic modulus of the interbody fusion cage corresponding to the target bone segment pair based on the first elastic modulus corresponding to the lower bone segment in the target bone segment pair.

[0100] The devices mentioned in this article can be servers, PCs, tablets, mobile phones, etc.

[0101] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having the following method steps: acquiring a CT image of a target object, wherein the CT image includes a skeletal image of the spine of the target object; calculating the elastic modulus of the skeletal segments in the CT image to obtain a first elastic modulus corresponding to the skeletal segments, and calculating the distance between the skeletal segments in the CT image to obtain a target distance value; determining a second elastic modulus and a height value of the interbody fusion device based on the first elastic modulus corresponding to the skeletal segments and the target distance value; and determining a preoperative planning scheme for the interbody fusion device based on the second elastic modulus and the height value.

[0102] Optionally, before calculating the elastic modulus of the bone segments in the CT image to obtain the first elastic modulus corresponding to the bone segment, the method includes: obtaining a preset first target range, wherein the first target range is the range of the interbody fusion device to be implanted; cropping the CT image according to the preset first target range to obtain a cropped CT image; segmenting the cropped CT image according to the bone segments in the cropped CT image to obtain a CT image corresponding to each bone segment; and performing three-dimensional reconstruction based on the CT image corresponding to each bone segment to obtain a three-dimensional model corresponding to each bone segment.

[0103] Optionally, calculating the elastic modulus of bone segments in CT images to obtain the first elastic modulus corresponding to a bone segment includes: determining the volume data corresponding to each bone segment based on the three-dimensional model corresponding to each bone segment; and calculating the first elastic modulus based on the volume data corresponding to each bone segment and the Hu value corresponding to each bone segment.

[0104] Optionally, the calculation of the first elastic modulus based on the volume data and Hu value of each bone segment includes: extracting the sagittal and coronal planes of each bone segment according to the preset shape and the volume data of each bone segment to obtain a second target range; and calculating the first elastic modulus based on the Hu value of each pixel point of each bone segment within the second target range.

[0105] Optionally, calculating the first elastic modulus based on the Hu value of each pixel within the second target range for each skeletal segment includes: obtaining the Hu value of each pixel within the second target range for each skeletal segment; calculating the average Hu value based on the Hu value of each pixel; calculating the product of the average Hu value and a first value to obtain a target product value; and calculating the difference between the target product value and a second value to obtain the first elastic modulus.

[0106] Optionally, calculating the distance between bone segments in the CT image to obtain the target distance value includes: obtaining the target three-dimensional model corresponding to the first target range based on the three-dimensional model corresponding to each bone segment; determining the center point position between any two adjacent first and second bone segments in the target three-dimensional model; and measuring the distance between the first and second bone segments based on the center point position to obtain the target distance value.

[0107] Optionally, determining the second elastic modulus and height of the interbody fusion cage based on the first elastic modulus and target distance value corresponding to the bone segments includes: determining any pair of target bone segments for which the interbody fusion cage is to be implanted, wherein the target bone segment pair consists of two adjacent bone segments; obtaining the target distance value corresponding to the target bone segment pair and the first elastic modulus corresponding to the lower bone segment in the target bone segment pair; determining the height of the interbody fusion cage corresponding to the target bone segment pair based on the target distance value corresponding to the target bone segment pair; and determining the second elastic modulus of the interbody fusion cage corresponding to the target bone segment pair based on the first elastic modulus corresponding to the lower bone segment in the target bone segment pair.

[0108] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0109] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations 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, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0110] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0111] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0112] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0113] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, like read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0114] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, 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 technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0115] It should also be noted that 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 process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0116] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0117] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for determining a preoperative planning scheme based on an interbody fusion cage, characterized in that, include: Acquire CT images of the target object, wherein the CT images include skeletal images of the spine of the target object; The elastic modulus of the bone segments in the CT image is calculated to obtain the first elastic modulus corresponding to the bone segment, and the distance between the bone segments in the CT image is calculated to obtain the target distance value. Based on the first elastic modulus corresponding to the bone segment and the target distance value, the second elastic modulus of the interbody fusion device and the height value of the interbody fusion device are determined; Based on the second elastic modulus and the height value, the preoperative planning scheme for the interbody fusion device is determined; Determining the second elastic modulus of the interbody fusion cage and the height of the interbody fusion cage based on the first elastic modulus corresponding to the bone segment and the target distance value includes: Identify any pair of target bone segments to be implanted with the interbody fusion device, wherein the target bone segment pair consists of two adjacent bone segments; Obtain the target distance value corresponding to the target bone segment pair and the first elastic modulus corresponding to the lower bone segment in the target bone segment pair; Based on the target distance value corresponding to the target bone segment pair, determine the height value of the interbody fusion device corresponding to the target bone segment pair; Based on the first elastic modulus corresponding to the lower bone segment in the target bone segment pair, the second elastic modulus of the interbody fusion device corresponding to the target bone segment pair is determined.

2. The method according to claim 1, characterized in that, Before calculating the elastic modulus of the bone segments in the CT image to obtain the first elastic modulus corresponding to the bone segments, the method includes: Obtain a preset first target range, wherein the first target range is the range within which the interbody fusion device is to be implanted; The CT image is cropped according to the preset first target range to obtain the cropped CT image; The cropped CT image is segmented based on the bone segments in the cropped CT image to obtain a CT image corresponding to each bone segment; Three-dimensional reconstruction is performed based on the CT images corresponding to each bone segment to obtain a three-dimensional model for each bone segment.

3. The method according to claim 2, characterized in that, The elastic modulus of the bone segments in the CT image is calculated to obtain the first elastic modulus corresponding to the bone segments, including: Based on the three-dimensional model corresponding to each bone segment, determine the volume data corresponding to each bone segment; The first elastic modulus is obtained by calculating based on the volume data and Hu value corresponding to each bone segment.

4. The method according to claim 3, characterized in that, The first elastic modulus is calculated based on the volume data and Hu value corresponding to each bone segment, including: Based on the preset shape and the volume data corresponding to each bone segment, the sagittal plane and the coronal plane of each bone segment are cut to obtain the second target range; The first elastic modulus is obtained by calculating the Hu value of each pixel point within the second target range for each skeletal segment.

5. The method according to claim 4, characterized in that, The first elastic modulus is calculated based on the Hu value of each pixel within the second target range for each skeletal segment, including: Obtain the Hu value of each pixel within the second target range for each skeletal segment; The average Hu value is obtained by averaging the Hu values ​​of each pixel. Calculate the product of the average Hu value and the first value to obtain the target product value; The difference between the target product value and the second value is calculated to obtain the first elastic modulus.

6. The method according to claim 2, characterized in that, The distances between skeletal segments in the CT images are calculated to obtain target distance values, including: Based on the three-dimensional model corresponding to each bone segment, the target three-dimensional model corresponding to the first target range is obtained; For any two adjacent first and second bone segments in the target 3D model, determine the position of the center point between the first and second bone segments; The target distance value is obtained by measuring the distance between the first bone segment and the second bone segment based on the center point position.

7. A device for determining a preoperative planning scheme based on an interbody fusion cage, characterized in that, include: The first acquisition unit is used to acquire a CT image of a target object, wherein the CT image includes a skeletal image of the spine of the target object; The calculation unit is used to calculate the elastic modulus of the bone segments in the CT image to obtain the first elastic modulus corresponding to the bone segments, and to calculate the distance between the bone segments in the CT image to obtain the target distance value. The first determining unit is used to determine the second elastic modulus of the interbody fusion device and the height value of the interbody fusion device based on the first elastic modulus corresponding to the bone segment and the target distance value. The second determining unit is used to determine the preoperative planning scheme of the interbody fusion device based on the second elastic modulus and the height value; The first determining unit includes: a fifth determining subunit, used to determine any pair of target bone segments to be implanted with an interbody fusion device, wherein the target bone segment pair consists of two adjacent bone segments; an acquisition subunit, used to acquire the target distance value corresponding to the target bone segment pair and the first elastic modulus corresponding to the lower bone segment in the target bone segment pair; a sixth determining subunit, used to determine the height value of the interbody fusion device corresponding to the target bone segment pair based on the target distance value corresponding to the target bone segment pair; and a seventh determining subunit, used to determine the second elastic modulus of the interbody fusion device corresponding to the target bone segment pair based on the first elastic modulus corresponding to the lower bone segment in the target bone segment pair.

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 controls the device to perform the method for determining a preoperative planning scheme based on an interbody fusion device as described in any one of claims 1 to 6.

9. An electronic device, characterized in that, It includes one or more processors and a memory, the memory being 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 cause the one or more processors to implement the method for determining a preoperative planning scheme based on an interbody fusion device as described in any one of claims 1 to 6.

Images