Near field imaging system for orthopedic prosthesis

We propose in this study a novel diagnostic tool, in the form of a magnetic imaging system, to monitor the kinematics of a knee orthopedic prosthesis. The system operates in near field, in the LF band (50 kHz), and can be used for every type of knee prosthesis provided that they are made of metal. The current system made of 20 inductive coils allows extracting the orientation around the yaw rotation axis of a femoral shield and was validated by practical measurements.