Initial Results on High Sensitivity Magnetic Induction Spectroscopy Circuit for Metal Detection in Human Body

Bone fracture healing has a relative close connection with the fixation stability. A dislocation of the bone screw may cause the screw loosening and future lead to screw defect. Early detection of the position shifting of the metal (bone screw) is the key for faster healing. Therefore, a high sensitivity Magnetic Induction Spectroscopy (MIS) is proposed to identify the relative position of the implanted metal in human body. The purpose of this study is to investigate the potentials of MIS for metal detection in human body. In this project, the MIS circuit is designed, simulated using NI Multisim Software and hence fabricated on the PCB. This study has found that a magnitude measurement technique of MIS system is sufficiently sensitive for metal detection in human body, due to the conductivity of the biological tissues is million times lower than metallic object. The study also proven that the developed MIS circuit is capable in detecting the position shift of metal in human body at operating frequency of 500 kHz.