5 DOF Capsule Endoscopy with Wi-Fi based Video Transmission Module

Endoscopy is an effective tool for early diagnosis and treatment of gastrointestinal diseases. An increasing number of medical institutions prefer wireless capsule endoscopy (WCE) rather than traditional endoscopies. However, the capsule endoscopy that launched in the current commercial market have disadvantages of inability of active locomotion and low data transmission rate. This paper presents a 6 square coils electromagnetic control system with Wi-Fi based video transmission module for WCE. By adjusting the driven current of these coils, the electromagnetic device is able to generate uniform magnetic field to control the rotation as well as a gradient magnetic field to control the propulsion of the capsule endoscopy. In addition, the proposed WCE improves the transmission rate via high frequency communication technology. This WCE is Wi-Fi enabled in the frequency of 2.4 GHz which achieves a data rate up to 150 Mbps. The designed WCE employs an in-body transceiver receiving control signals and transferring image data outside the body. Compare to current commercial capsule endoscopy, the experiment results demonstrate that the proposed WCE achieves high transmission rate up to 30 frame per second (fps). Furthermore, it realizes the five degree of freedom motion and improves the control precision.