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Localization of site-specific delivery capsule in vivo with alternating electromagnetic field

Site-specific delivery capsule (SSDC) is a robotic capsule. It can load with drug and deliver the drug to the selected sites of human or animalspsila gut. In order to know whether the capsule have moved into the selected sites, we use receiving coils to detect the magnetic field generated by the eddy current in batteries of the capsule when the capsule exists in the alternating magnetic field. Experiment in simulative conditions of gastrointestinal (GI) tract is carried out and the result verifies the effectiveness of this method.