title: Wireless powered capsule endoscopy for colon diagnosis and treatment.
abstract: This paper presents a wireless power transfer system integrated with an active locomotion and biopsy module in an endoscopic capsule for colon inspection. The capsule, which can move automatically, is designed for non-invasive biopsy and visual inspection of the intestine. To supply enough power for multiple functions and ensure safety for the human body, the efficiency of the current power transmission system needs to be improved. To take full advantage of the volume in the capsule body, a novel structure of receiving coils wound on a multi-core of MnZn ferrite hollow cylinder was used; with this new core, the efficiency increased to more than 7.98%. Up to 1.4 W of dc power can be delivered to the capsule as it travels along the gastrointestinal tract. Three micro motors were integrated for pumping, anchoring, locomotion and biopsy. A user interface and RF communication enables the operator to drive the capsule in an intuitive manner. To gauge the efficacy of the wireless power supply in a simulated real-world application, the biopsy and locomotion capabilities of the device were successfully tested in a slippery, soft tube and gut environment in vitro.
authors.affiliation: Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.
authors.forename: Wenwen
authors.initials: W
authors.lastname: Chen
authors.forename: Guozheng
authors.initials: G
authors.lastname: Yan
authors.forename: Shu
authors.initials: S
authors.lastname: He
authors.forename: Quan
authors.initials: Q
authors.lastname: Ke
authors.forename: Zhiwu
authors.initials: Z
authors.lastname: Wang
authors.forename: Hua
authors.initials: H
authors.lastname: Liu
authors.forename: Pingping
authors.initials: P
authors.lastname: Jiang
mesh_terms: D001706:Biopsy; D053705:Capsule Endoscopes; D003108:Colonic Diseases / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy*; D006801:Humans; D008904:Miniaturization / Q000295:instrumentation*; D009038:Motion; D018511:Systems Integration; D059015:Wireless Technology / Q000295:instrumentation*