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Method for establishing human knee joint finite element model in movement process

A technology of motion process and establishment method, applied in 3D modeling, image data processing, special data processing applications, etc., can solve the problems of dwelling, difficult pressure distribution inside the knee joint, less research on daily motion process, etc., and achieve layer thickness Small, wide range of applications, the effect of increasing accuracy

Active Publication Date: 2021-04-30
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] At present, the biomechanical analysis methods of the knee joint in medicine mainly include the pressure-sensitive film method and the dyeing method. It is necessary to implant the sensor into the knee joint of the subject to obtain the stress distribution through surface measurement. Therefore, it is necessary to directly measure the inside of the real knee joint. Pressure distribution is very difficult
On the other hand, most of the research on the finite element model of the knee joint stays at the level of static analysis of flexion movement, and there are few studies on the daily movement process.

Method used

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  • Method for establishing human knee joint finite element model in movement process
  • Method for establishing human knee joint finite element model in movement process
  • Method for establishing human knee joint finite element model in movement process

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[0038] The specific implementation method of the present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0039] The invention provides a finite element modeling method of the whole knee joint, specifically as figure 1 and figure 2 As shown, the following steps are included:

[0040] Step 1. In this embodiment, Philips Ingenia 3.0 is used to scan the left leg of the experimenter's knee joint to obtain two-dimensional tomographic image data;

[0041] Step 2: Import the collected data files into Mimics software, use the threshold setting tool to extract bone tissue, and use the region growing tool to generate geometric masks of the tibia, femur, patella, and fibula; use the 3D lasso tool to outline the anterior and posterior intersections For soft tissue conto...

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Abstract

The invention relates to a method for establishing a finite element model of a human knee joint in a movement process, which comprises the following steps of: establishing a geometric model of the human knee joint, acquiring gait information of the human body, establishing the finite element model, and obtaining a stress distribution condition of a joint surface through finite element simulation to predict biomechanics in the knee joint in the movement process. In-vivo knee joint kinematics and a knee joint anatomical model are combined by adopting geometric simulation and simulation means, a three-dimensional motion capture system ViconT40S and Opensim are combined for simulation analysis, and a human body whole body muscle bone model with variable Opensim is utilized to match the human body metrology size of an experimenter, so that errors in simulation calculation are effectively controlled; and the accuracy of inverse kinematics and inverse dynamics solution is improved, so that the obtained final data is more accurate.

Description

technical field [0001] The invention relates to the technical field of joint modeling, in particular to a method for establishing a finite element model of a human knee joint in a movement process, which is a finite element modeling method of a knee joint in a walking state of a human body. Background technique [0002] The knee joint is an important hub for the movement of the lower limbs of the human body, and it is also the joint most prone to disease among the human joints. Its damage will seriously affect the patient's mobility and quality of life. Analyzing the biomechanics and kinematic characteristics of the knee joint is important for the research on the causes of knee joint degeneration, the treatment of knee joint diseases, the design and precise placement of knee joint prostheses, and the design and application of lower limb assisting systems. meaning. [0003] At present, the biomechanical analysis methods of the knee joint in medicine mainly include the pressu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06T17/20G06F119/14
CPCG06F30/23G06T17/20G06F2119/14Y02T90/00
Inventor 韩冰付鹏鸽刘更张力焦妍
Owner NORTHWESTERN POLYTECHNICAL UNIV
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