Abstract
Abstract There is a growing demand for information and computational technology for surgeons help with surgical planning as well as prosthetics design. The two-dimensional images are registered to the three-dimensional (3D) model for high efficiency. To reconstruct the 3D model of knee joint including bone structure and main soft tissue structure, the evaluation and analysis of sports injury and rehabilitation treatment are detailed in this study. Mimics 10.0 was used to reconstruct the bone structure, ligament, and meniscus according to the pulse diffusion-weighted imaging sequence (PDWI) and stir sequences of magnetic resonance imaging (MRI). Excluding congenital malformations and diseases of the skeletal muscle system, MRI scanning was performed on bilateral knee joints. Proton weighted sequence (PDWI sequence) and stir pulse sequence were selected for MRI. The models were imported into Geomagic Studio 11 software for refinement and modification, and 3D registration of bone structure and main soft tissue structure was performed to construct a digital model of knee joint bone structure and accessory cartilage and ligament structure. The 3D knee joint model including bone, meniscus, and collateral ligament was established. Reconstruction and image registration based on mimics and Geomagic Studio can build a 3D model of knee joint with satisfactory morphology, which can meet the requirements of teaching, motion simulation, and biomechanical analysis.
Highlights
Knee osteoarthritis (OA) is a common chronic joint disease that causes knee pain, deformity, and even disability in elderly patients
Finite element analysis based on a three-dimensional (3D) model of the knee joint is an effective tool to study the biomechanical characteristics of knee OA
The trained engineers can build 3D models of bone structures independently. It is difficult for engineers with simple anatomical knowledge to construct the mask of complex structure when segmenting non-osseous structural masks, while experienced radiologists or joint surgeons are more suitable for constructing non-osseous structure models
Summary
Knee osteoarthritis (OA) is a common chronic joint disease that causes knee pain, deformity, and even disability in elderly patients. Accurate understanding of the biomechanical characteristics of the OA knee joint is of great significance to prevent the occurrence of OA, delay its progress, and guide clinical treatment [1,2]. Finite element analysis based on a three-dimensional (3D) model of the knee joint is an effective tool to study the biomechanical characteristics of knee OA. Previous studies are mostly based on the normal knee joint 3D model construction, because the knee joint anatomical structure did not have pathological changes, so the construction of the knee joint model is relatively easy and accurate [3]. There is no literature report on the construction of a 3D model based on knee OA, which is difficult to explore the biomechanical behavior changes of knee OA through finite element analysis, to guide clinical treatment. In this study, computed tomography (CT) and magnetic resonance imaging (MRI) image data registration and fusion method were used to construct an
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