WO2020199694A1 - 一种脊柱Cobb角测量方法、装置、可读存储介质及终端设备 - Google Patents
一种脊柱Cobb角测量方法、装置、可读存储介质及终端设备 Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
- A61B5/1071—Measuring physical dimensions, e.g. size of the entire body or parts thereof measuring angles, e.g. using goniometers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
- G06F18/20—Analysing
- G06F18/21—Design or setup of recognition systems or techniques; Extraction of features in feature space; Blind source separation
- G06F18/214—Generating training patterns; Bootstrap methods, e.g. bagging or boosting
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/11—Region-based segmentation
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- G—PHYSICS
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- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/40—Extraction of image or video features
- G06V10/44—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
Definitions
- the invention belongs to the technical field of image analysis, and in particular relates to a method, a device, a computer-readable storage medium and a terminal device for measuring the Cobb angle of the spine.
- the traditional method of measuring the Cobb angle of the spine is to manually measure it on X-rays with a pencil and a protractor.
- the staff finds out the end vertebra with the largest inclination through experience. Scoliosis will roughly show three bends, and the largest bend is the Cobb angle. Because this method is performed manually, there are certain errors, and the reliability within and between observers is also poor.
- This method requires manual drawing of the extension line of the end plate and then making the vertical line and measuring with a protractor. These manual operations have brought various errors and caused differences between and within observers.
- the application of different pencils and protractors, the different widths of the lines drawn, the quality of the X-ray film and other factors will cause measurement errors.
- the embodiments of the present invention provide a method, device, computer-readable storage medium, and terminal device for measuring the Cobb angle of the spine to solve the reliability of the existing method for measuring the Cobb angle of the spine by manual or semi-manual methods. Poor problem.
- the first aspect of the embodiments of the present invention provides a method for measuring the Cobb angle of the spine, which may include:
- segmentation result map being a binary image of the spine region and the non-spine region
- the traverse calculation is performed on the straight lines of the upper and lower endplates of each spine block, and the angle with the largest value is determined as the Cobb angle of the spine.
- the identifying each spine block from the spine area of the segmentation result map includes:
- the method of using the smallest outer envelope rectangle separately identifies each spine block from the spine area of the segmentation result map.
- determining the upper and lower endplate straight lines of each spine block respectively includes:
- the pixel value of each spine block is detected, and the pixel in the area where the first type of pixel mutation occurs is determined as the upper endplate point, and the pixel in the second type of pixel mutation area is determined as the lower endplate point.
- the first type of pixel mutation area is an area that changes from a preset first pixel value to a preset second pixel value
- the second type of pixel mutation area is an area that changes from the second pixel value to the first pixel value.
- the least square method is used to perform function fitting on the upper endplate points of each spine block to obtain the upper endplate straight line of each spine block;
- the least square method was used to perform function fitting on the lower endplate points of each spine block, and the straight line of the lower endplate of each spine block was obtained.
- the pre-trained deep learning network model before using the pre-trained deep learning network model to segment the spine X-ray image, it also includes:
- Training the deep learning network model by using the sample image and the truth map of the sample image to obtain a trained deep learning network model.
- the deep learning network model is a U-net segmentation network.
- a second aspect of the embodiments of the present invention provides a spine Cobb angle measuring device, which may include:
- the image segmentation module is used to segment the spine X-ray image using a pre-trained deep learning network model to obtain a segmentation result map, the segmentation result map being a binary image of the spine region and the non-spine region;
- a spine block identification module which is used to identify each spine block from the spine area of the segmentation result map
- the upper and lower endplate determining module is used to determine the straight lines of the upper and lower endplates of each spine block;
- the spine Cobb angle determination module is used to traverse the upper and lower endplate lines of each spine block, and determine the angle with the largest value as the spine Cobb angle.
- the spine block recognition module is specifically configured to use the smallest outer envelope rectangle method to recognize each spine block from the spine area of the segmentation result map.
- the upper and lower endplate determining module may include:
- the pixel detection unit is used to detect the pixel value of each spine block, and determine the pixel in the first type of pixel mutation area as the upper end plate point, and determine the pixel in the second type of pixel mutation area Is a lower end plate point, the first type of pixel mutation area is an area that changes from a preset first pixel value to a preset second pixel value, and the second type of pixel mutation area is from the second pixel The area where the value becomes the first pixel value;
- the upper endplate straight line fitting unit is used to perform function fitting on the upper endplate points of each spine block by using the least square method to obtain the upper endplate straight line of each spine block;
- the lower endplate straight line fitting unit is used to perform function fitting on the lower endplate points of each spine block by using the least square method to obtain the lower endplate straight line of each spine block.
- the spine Cobb angle measuring device may further include:
- the data labeling module is used for data labeling of the sample image and making a truth map of the sample image
- the model training module is used to train the deep learning network model using the sample image and the truth map of the sample image to obtain a trained deep learning network model.
- a third aspect of the embodiments of the present invention provides a computer-readable storage medium, the computer-readable storage medium stores computer-readable instructions, and when the computer-readable instructions are executed by a processor, any of the above-mentioned spinal Cobb Steps of angle measurement method.
- the fourth aspect of the embodiments of the present invention provides a terminal device, including a memory, a processor, and computer-readable instructions stored in the memory and running on the processor, and the processor executes the computer
- the steps of any of the above-mentioned methods for measuring the Cobb angle of the spine are realized when the instructions are readable.
- the embodiment of the present invention has the beneficial effect that: the embodiment of the present invention uses a pre-trained deep learning network model to segment the spine X-ray image to obtain a segmentation result map, and the segmentation result map is the spine Binary images of regions and non-spine regions; respectively identify each spine block from the spine region of the segmentation result map; determine the upper and lower endplate lines of each spine block respectively; traverse the upper and lower endplate lines of each spine block , The angle with the largest value is determined as the Cobb angle of the spine.
- Figure 1 is a schematic diagram of the traditional measurement method of the Cobb angle of the spine
- FIG. 2 is a flowchart of an embodiment of a method for measuring Cobb angle of the spine in an embodiment of the present invention
- Figure 3 is a schematic diagram of making a truth map
- Fig. 5 is a schematic diagram of a specific example of measuring the Cobb angle of the spine
- FIG. 6 is a structural diagram of an embodiment of a device for measuring Cobb angle of the spine in an embodiment of the present invention
- Fig. 7 is a schematic block diagram of a terminal device in an embodiment of the present invention.
- an embodiment of a method for measuring Cobb angle of the spine in an embodiment of the present invention may include:
- Step S201 Use the pre-trained deep learning network model to perform segmentation processing on the spine X-ray image to obtain a segmentation result map.
- the deep learning network model may be a U-net segmentation network.
- the spine needs to be extracted from the X-ray image, and the X-ray image is a grayscale image.
- the task can be simplified to a two-classification problem, that is, the image is divided into spine and non-spine areas.
- the deep learning network model is trained to obtain a trained deep learning network model. That is to say, supervise the learning of the segmentation network by making a good truth map.
- the truth map provides a "gold standard" in the deep learning segmentation network, that is, when the network learns features, it refers to the truth map for parameter learning, so , The quality of the truth map directly affects the result of segmentation. Because there is a lot of redundant information in the X-ray image of the spine, experienced staff are required to make the data set.
- Figure 3 is a schematic diagram of making a truth map
- the staff marked the spine area the pixel value of the marked spine area was changed to 0, and the background area, that is, the non-spine area, was changed to 1.
- the input data pixels are only 0 and 1, and the data is processed as above to complete the process of making training data.
- the upper and lower endplates of the spine are extracted through the staff’s anatomical experience, instead of simply extracting the entire spine block area.
- Using such a truth map production method can improve segmentation The accuracy is so that the later Cobb angle measurement can accurately calculate the angle size.
- the original image data of the spine X-ray image is relatively small, and deep learning requires a lot of data for training. Therefore, after the data labeling work is completed, the data set needs to be expanded, and the original image is transformed by rotation, offset, etc. Expand to an ideal state.
- the data enhancement code that comes with Keras is used.
- Keras is a framework based on tensorflow developed by Google, which is very convenient to use, and the network construction work can be completed by directly using its modules.
- network training can be performed.
- the entire training process is based on the Keras framework, the programming language used is Pyhton, the version is 3.6, and the compiler is Pycharm.
- the experimental platform is based on Windows 7 system, and the graphics card used is With NVIDIA GeForce GTX 1080 Ti, a segmentation result map can be obtained after a period of training, and the segmentation result map is a binary image of the spine region and the non-spine region.
- Step S202 Identify each spine block from the spine area of the segmentation result map.
- the shape of the spine block is similar to a rectangle, in this embodiment, it is preferable to use the method of the smallest outer envelope rectangle to identify each spine block from the spine region of the segmentation result map, and to compare each segment in the segmentation result map as shown.
- the spine blocks are all enveloped so that each spine block can be manipulated individually.
- Step S203 Determine the upper and lower endplate straight lines of each spine block respectively.
- the pixel value of each spine block is detected first, and the pixel in the area where the first type of pixel mutation occurs is determined as the upper end plate point, and the pixel in the second type of pixel mutation area is determined as the bottom end. Board point.
- the first type of pixel mutation area is an area that changes from a preset first pixel value to a preset second pixel value
- the second type of pixel mutation area is an area that changes from the second pixel value to the first pixel value.
- the first pixel value is the pixel value of the non-spine area
- the second pixel value is the pixel value of the spine area.
- the least square method is used to perform function fitting on the upper endplate points of each spine block to obtain the upper endplate straight line of each spine block.
- the least square method is used to perform function fitting on the inferior endplate points of each spine block to obtain the inferior endplate straight line of each spine block.
- the least square method is used Fitting the red point group to the function can get the upper endplate straight line of the spine block.
- using the least squares method to fit the blue point group to the function fitting can get the lower endplate straight line of the spine block, and then the same way Operate each spine block to obtain the upper and lower endplate straight lines of each spine block.
- the fitted upper endplate line and the lower endplate line can be stored separately for subsequent use.
- Step S204 Perform traversal calculation on the upper and lower endplate straight lines of each spine block, and determine the angle with the largest value as the spine Cobb angle.
- this embodiment can also give the specific position of the Cobb angle of the spine at the same time.
- every spine block has a corresponding name.
- the spine Cobb angle measurement here does not involve the cervical spine, so it is not included here.
- the upper and lower endplates of each spine block are given corresponding names to realize the vertebral counting function.
- Figure 4 shows a schematic diagram of the complete process of the method for measuring the Cobb angle of the spine in this embodiment.
- Figure 5 shows a specific example of measuring the Cobb angle of the spine. In this example, the measured angle is 40 degrees.
- the upper vertebra is T11, and the lower vertebra is L3.
- the entire automatic counting Cobb angle code is based on the computer vision library Opencv 3.3.1 version
- the writing language is C++ language
- the compilation platform is Visual Stdio 2013, and the experiment platform is based on Windows 7 system
- the graphics card used is NVIDIA GeForce GTX 1080 Ti.
- the embodiment of the present invention uses a pre-trained deep learning network model to segment the spine X-ray image to obtain a segmentation result map, which is a binary image of the spine region and the non-spine region;
- a segmentation result map which is a binary image of the spine region and the non-spine region;
- Each spine block is identified in the spine region of the segmentation result map; the upper and lower endplate straight lines of each spine block are respectively determined; the upper and lower endplate straight lines of each spine block are traversed and the angle with the largest value is determined as the spine Cobb corner.
- FIG. 6 shows a structural diagram of an embodiment of a device for measuring the Cobb angle of the spine provided by an embodiment of the present invention.
- a device for measuring Cobb angle of the spine may include:
- the image segmentation module 601 is configured to perform segmentation processing on the spine X-ray image using a pre-trained deep learning network model to obtain a segmentation result map, which is a binary image of the spine region and the non-spine region;
- the spine block identification module 602 is used to identify each spine block from the spine area of the segmentation result map
- the upper and lower endplate determining module 603 is used to separately determine the upper and lower endplate straight lines of each spine block;
- the spine Cobb angle determination module 604 is used to traverse the upper and lower endplate lines of each spine block, and determine the angle with the largest value as the spine Cobb angle.
- the spine block recognition module is specifically configured to use the smallest outer envelope rectangle method to recognize each spine block from the spine area of the segmentation result map.
- the upper and lower endplate determining module may include:
- the pixel detection unit is used to detect the pixel value of each spine block, and determine the pixel in the first type of pixel mutation area as the upper end plate point, and determine the pixel in the second type of pixel mutation area Is a lower end plate point, the first type of pixel mutation area is an area that changes from a preset first pixel value to a preset second pixel value, and the second type of pixel mutation area is from the second pixel The area where the value becomes the first pixel value;
- the upper endplate straight line fitting unit is used to perform function fitting on the upper endplate points of each spine block by using the least square method to obtain the upper endplate straight line of each spine block;
- the lower endplate straight line fitting unit is used to perform function fitting on the lower endplate points of each spine block by using the least square method to obtain the lower endplate straight line of each spine block.
- the spine Cobb angle measuring device may further include:
- the data labeling module is used for data labeling of the sample image and making a truth map of the sample image
- the model training module is used to train the deep learning network model using the sample image and the truth map of the sample image to obtain a trained deep learning network model.
- FIG. 7 shows a schematic block diagram of a terminal device according to an embodiment of the present invention. For ease of description, only parts related to the embodiment of the present invention are shown.
- the spine Cobb angle measurement terminal device 7 of this embodiment includes a processor 70, a memory 71, and a computer program 72 stored in the memory 71 and running on the processor 70.
- the processor 70 executes the computer program 72, the steps in the foregoing embodiments of the method for measuring the Cobb angle of the spine are implemented, such as steps S201 to S204 shown in FIG. 2.
- the processor 70 executes the computer program 72, the functions of the modules/units in the foregoing device embodiments, for example, the functions of the modules 601 to 604 shown in FIG. 6 are realized.
- the computer program 72 may be divided into one or more modules/units, and the one or more modules/units are stored in the memory 71 and executed by the processor 70 to complete this invention.
- the one or more modules/units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 72 in the spine Cobb angle measurement terminal device 7.
- the spine Cobb angle measurement terminal device 7 may be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. Those skilled in the art can understand that FIG. 7 is only an example of the spine Cobb angle measurement terminal device 7 and does not constitute a limitation on the spine Cobb angle measurement terminal device 7. It may include more or less components than shown in the figure, or a combination Certain components, or different components, for example, the spine Cobb angle measurement terminal device 7 may also include input and output devices, network access devices, buses, and the like.
- the processor 70 may be a central processing unit (Central Processing Unit, CPU), other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
- the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
- the memory 71 may be an internal storage unit of the spine Cobb angle measurement terminal device 7, for example, a hard disk or a memory of the spine Cobb angle measurement terminal device 7.
- the memory 71 may also be an external storage device of the spine Cobb angle measurement terminal device 7, for example, a plug-in hard disk or a smart media card (SMC) equipped on the spine Cobb angle measurement terminal device 7, Secure Digital (SD) card, flash memory card (Flash Card) etc.
- the memory 71 may also include both an internal storage unit of the spine Cobb angle measurement terminal device 7 and an external storage device.
- the memory 71 is used to store the computer program and other programs and data required by the spine Cobb angle measurement terminal device 7.
- the memory 71 can also be used to temporarily store data that has been output or will be output.
- the disclosed device/terminal device and method may be implemented in other ways.
- the device/terminal device embodiments described above are only illustrative.
- the division of the modules or units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units.
- components can be combined or integrated into another system, or some features can be omitted or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
- the integrated module/unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
- the present invention implements all or part of the processes in the above-mentioned embodiments and methods, and can also be completed by instructing relevant hardware through a computer program.
- the computer program can be stored in a computer-readable storage medium. When the program is executed by the processor, the steps of the foregoing method embodiments can be implemented.
- the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file, or some intermediate forms.
- the computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signals, telecommunications signals, and software distribution media.
- ROM Read-Only Memory
- RAM Random Access Memory
- electrical carrier signals telecommunications signals
- software distribution media any entity or device capable of carrying the computer program code
- recording medium U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signals, telecommunications signals, and software distribution media.
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Abstract
Description
Claims (10)
- 一种脊柱Cobb角测量方法,其特征在于,包括:使用预先训练好的深度学习网络模型对脊柱X光图像进行分割处理,得到分割结果图,所述分割结果图为脊柱区域与非脊柱区域的二值图像;从所述分割结果图的脊柱区域中分别识别出各个脊柱块;分别确定各个脊柱块的上下终板直线;对各个脊柱块的上下终板直线进行遍历计算,将取值最大的夹角确定为脊柱Cobb角。
- 根据权利要求1所述的脊柱Cobb角测量方法,其特征在于,所述从所述分割结果图的脊柱区域中分别识别出各个脊柱块包括:使用最小外包络矩形的方法从所述分割结果图的脊柱区域中分别识别出各个脊柱块。
- 根据权利要求1所述的脊柱Cobb角测量方法,其特征在于,所述分别确定各个脊柱块的上下终板直线包括:对各个脊柱块的像素点进行像素值检测,并将发生第一类像素突变区域的像素点确定为上终板点,将发生第二类像素突变区域的像素点确定为下终板点,所述第一类像素突变区域为从预设的第一像素值变为预设的第二像素值的区域,所述第二类像素突变区域为从所述第二像素值变为所述第一像素值的区域;采用最小二乘法分别对各个脊柱块的上终板点进行函数拟合,得到各个脊柱块的上终板直线;采用最小二乘法分别对各个脊柱块的下终板点进行函数拟合,得到各个脊柱块的下终板直线。
- 根据权利要求1所述的脊柱Cobb角测量方法,其特征在于,在使用预先训练好的深度学习网络模型对脊柱X光图像进行分割处理之前,还包括:对样本图像进行数据标注,制作所述样本图像的真值图;使用所述样本图像以及所述样本图像的真值图对所述深度学习网络模型进行训练,得到训练好的深度学习网络模型。
- 根据权利要求1至4中任一项所述的脊柱Cobb角测量方法,其特征在于,所述深度学习网络模型为U-net分割网络。
- 一种脊柱Cobb角测量装置,其特征在于,包括:图像分割模块,用于使用预先训练好的深度学习网络模型对脊柱X光图像进行分割处理,得到分割结果图,所述分割结果图为脊柱区域与非脊柱区域的二值图像;脊柱块识别模块,用于从所述分割结果图的脊柱区域中分别识别出各个脊柱块;上下终板确定模块,用于分别确定各个脊柱块的上下终板直线;脊柱Cobb角确定模块,用于对各个脊柱块的上下终板直线进行遍历计算,将取值最大的夹角确定为脊柱Cobb角。
- 根据权利要求6所述的脊柱Cobb角测量装置,其特征在于,所述上下终板确定模块包括:像素点检测单元,用于对各个脊柱块的像素点进行像素值检测,并将发生第一类像素突变区域的像素点确定为上终板点,将发生第二类像素突变区域的像素点确定为下终板点,所述第一类像素突变区域为从预设的第一像素值变为预设的第二像素值的区域,所述第二类像素突变区域为从所述第二像素值变为所述第一像素值的区域;上终板直线拟合单元,用于采用最小二乘法分别对各个脊柱块的上终板点进行函数拟合,得到各个脊柱块的上终板直线;下终板直线拟合单元,用于采用最小二乘法分别对各个脊柱块的下终板点进行函数拟合,得到各个脊柱块的下终板直线。
- 根据权利要求6所述的脊柱Cobb角测量装置,其特征在于,所述脊柱Cobb角测量装置还包括:数据标注模块,用于对样本图像进行数据标注,制作所述样本图像的真值图;模型训练模块,用于使用所述样本图像以及所述样本图像的真值图对所述深度学习网络模型进行训练,得到训练好的深度学习网络模型。
- 一种计算机可读存储介质,所述计算机可读存储介质存储有计算机可读指令,其特征在于,所述计算机可读指令被处理器执行时实现如权利要求1至5中任一项所述的脊柱Cobb角测量方法的步骤。
- 一种终端设备,包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机可读指令,其特征在于,所述处理器执行所述计算机可读指令时实现如权利要求1至5中任一项所述的脊柱Cobb角测量方法的步骤。
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