Abstract: Swallowable capsule endoscopy is used for non-invasive diagnosis of some gastrointestinal (GI) organs. However, control over the position of the capsule is a major unresolved issue. This study presents a design for steering the capsule based on magnetic levitation. The levitation is stabilized with the aid of a computer-aided feedback control system and diamagnetism. Peristaltic and gravitational forces to be overcome were calculated. A levitation setup was built to analyze the feasibility of using Hall Effect sensors to locate the invivo capsule. CAD software Maxwell 3D (Ansoft, Pittsburgh, PA) was used to determine the dimensions of the resistive electromagnets required for levitation and the feasibility of building them was examined. Comparison based on design complexity was made between positioning the patient supinely and upright.

Keywords: Computer-Aided? Magnetic Levitation, Capsule Endoscopy, Real-Time? Image Transmission

ACM Classification Keywords: J.6 Computer-Aided? Engineering

Link:

ON THE FEASIBILITY OF STEERING SWALLOWABLE MICROSYSTEM CAPSULES USING COMPUTER-AIDED MAGNETIC LEVITATION

Billy T. Wu, Martin P. Mintchev

http://www.foibg.com/ibs_isc/ibs-05/IBS-05-p02.pdf