Statistical shape modeling of the knee for three-dimensional fluoroscopic imaging of joint motion: accuracy assessment

The purpose of the study was to assess the accuracy of measuring knee kinematics using 3D fluoroscopy with statistical shape models (SSM) of the bones to minimize radiation. The accuracy was determined by comparing results between SSM and CT bone models. The results showed that 3D knee kinematics using SSM bone models reached sub-millimetre and sub-degree accuracy, suggesting that 3D fluoroscopy with SSM bone models can be used in further clinical applications with minimum radiation exposure.