ABSTRACT
Measurement of three-dimensional (3D) human motion has been practiced in the clinic for almost 50 yr. These measurements have provided critical information for understanding and treating abnormalities of human gait, posture, balance, and sports performance. Over the past 10 to 15 yr, there has been a growing capability for more accurate and precise measurements of the moving human skeleton using dynamic radiographic imaging techniques. These observations permit novel analyses such as wear modeling of total knee replacement components
and assessing impingement and dislocation of total hip replacements.
