Towards Differential Static Magnetic Localization of Commercial Capsule Endoscopes: An Evaluation Using Different Ring and Cylindrical Magnets

Abstract. Capsule endoscopy is a promising diagnostic tool for the entire gastrointestinal tract. Since patient swallows capsules, their size must be sufficiently small. The principal built-in components are cameras, silver-oxide batteries, light emitting diodes, and an antenna transmitting video. For diagnosis treatment, precise localization of capsules specific video frames required. Recently, static magnetic these with integrated permanent magnet showed results. However, in state-of-the-art, relatively large magnets compared to small were used. Therefore, this extended paper, performance recently proposed optimized differential method different sized disc ring was evaluated. designed integration two batteries commercial capsules. evaluated dynamic scenarios evaluate patient's daily life. It revealed that mean position orientation errors did not exceed 5 mm 4∘, respectively, all applied except 1.5 3 long magnets. Moreover, results indicated ferromagnetic capsule endoscopes increase when they centered within diametrical magnet. Overall, it significantly better than state-of-the-art even volume reduced previous work. concluded or excellent candidates into yield advantage being passive sources.