Three-dimensional gait analysis VICON system Three-dimensional gait analysis VICON system is a biomechanical research system introduced by the British company VICON, which uses the concept of mechanics and knowledge of anatomy and physiology to conduct comparative analysis of the functional state of human walking. It was introduced to our department in 2010, worth 1.5 million. The research scope of the 3D gait analysis VICON system is divided into 3 areas: (1) observation and analysis of the movement of limbs and joints during walking; (2) observation and analysis of the shift of the center of gravity during walking; (3) data analysis of joints, muscles and ligaments during walking. In many advanced countries, gait analysis has been widely used in diagnosis and treatment. Our hospital has started to use 3D gait analysis in a more mature way, and has been quantitatively analyzing the walking ability of patients with cerebral palsy, spinal cord injury, and hemiplegia. The specially designed sensor for motion, which can achieve both high resolution and high sampling, is effective and powerful, and is widely used in the fields of rehabilitation training guidance, sports training, and biomechanics research. The advanced nature of the 3D gait analysis VICON system is reflected in: 1. the world’s highest accuracy through the use of 16 megapixel camera; 2. the ability to achieve video animation and three-dimensional space fusion achieved the world’s fastest full-resolution sampling frequency; 3. the combination of unique sensor technology, using CMOS sensors, to achieve a fully electronic shutter; 4. through the 10Bit gray scale and ellipse approximation 5, standard configuration of super strobe light source to further achieve 2-7 times the illumination; 6, the merger of static and dynamic calibration tools to maximize the simplification of calibration work.