Experimental Study of Magnetic-based Localization Model for Miniature Medical Device Placed Indwelling Human Body

More and more miniature medical devices (MMD), such as alimentary canal miniature drug delivering device, wireless endoscope, feeding tubes and treatment probes, have been researched and developed for clinical diagnosis and therapy. When a MMD was put into the human body for diagnosis and therapy, it is necessary to provide a non-invasive locating method that can locate the MMD in long-term. Here, a novel magnetic-based position method has been explored. According to the principle of magnet field distribution of magnetic dipole, a special multi-sensor magnetic detecting system has been designed and a modified magnetic position model was proposed based on curve-fitting process with detected data. Models with different coefficient have been compared, and a better one has been constructed. The results demonstrate that the proposed magnetic-based position method is promising and effective.