Constructing digital model of knee joint and surrounding soft tissue surface by three-dimensional image registration technology
Zhang Xiaohui1, Zhang Mingjun1, Wang Jianping1, Qu Haijun1, Chai Le2, Li Yu1, Zhang Xinmin1
1School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan Province, China; 2Department of Orthopedics, First Affiliated Hospital of Henan Polytechnic University, Jiaozuo 454003, Henan Province, China
Abstract: BACKGROUND: With the development of modern industry, modern national defense and modern medical rehabilitation industry, bionic design and manufacturing technology is booming. This technology often takes various organisms and their tissues as research objects, imitating their geometric shapes, mechanical properties and other indicators, and then achieves reverse design and manufacture of various synthetic products, in which the effective bionics of geometric shapes, especially surface modeling technology, is a key part of it.
OBJECTIVE: Taking the human knee joint as an example, this paper discussed the practical application technology of surface modeling, and established a digital model of the geometric anatomy of the human knee joint. It provided support for the research on the biomechanical properties of the knee joint, and at the same time provided an effective teaching and research model for the complex surface modeling of the bionic mechanism.
METHODS: Using knee CT scan images and magnetic resonance imaging images, the point cloud data and approximation curves of bone tissue and soft tissue contours were obtained through medical image processing technology, respectively, and the knee joint entity models of bone tissue and soft tissue were reconstructed respectively. Finally, based on the 3D image registration technology, each soft tissue group was assembled on the bone tissue entity model to form the overall knee joint 3D model.
RESULTS AND CONCLUSION: Through 3D medical imaging technology, a digital anatomical digital model of knee joint with complex geometric surfaces including various bone tissues and ligaments, meniscus, tendons and other major soft tissues was constructed.
Key words: surface modeling, medical image processing, graphics education, image registration, curve approximation, knee joint, geometric model, biomechanics