RF Localization for Wireless Video Capsule Endoscopy

Abstract

RF localization science and technology started with the global positioning systems for outdoor areas, and it then transformed into wireless indoor geolocation. The next step in the evolution of this science is the transfor- mation into RF localization inside the human body. The first major application for this technology is the localiza- tion of the wireless video capsule endoscope (VCE) that has been in the clinical arena for 12 years. While physi- cians can receive clear images of abnormalities in the gastrointestinal tract with VCE devices, they have little idea of their exact location inside the GI tract. To localize intestinal abnormalities, physicians routinely use radio- logical, endoscopic or surgical operations. If we could use the RF signal radiated from the capsule to also locate these devices, not only can physicians discover medical prob- lems, but they can also learn where the problems are located. However, finding a realistic RF localization solu- tion for the endoscopy capsule is a very challenging task, because the inside of the human body is a difficult envi- ronment for experimentation and visualization. In addition, we have no-idea how the capsule moves and rotates in its 3D journey in this non-homogeneous medium for radio propagation. In this paper, we describe how we can design a cyber physical system (CPS) for experimental testing and visualization of interior of the human body that can be used for solving the RF localization problem for the endoscopy capsule. We also address the scientific challenges that face and the appropriate technical approaches for solving this problem.