Magnetic Actuation for Wireless Capsule Endoscopy in a Large Workspace Using a Mobile-Coil System

Area of Science:

• Robotics
• Biomedical Engineering
• Gastroenterology

Background:

• Current wireless capsule endoscopy (WCE) relies on passive peristalsis, leading to long examination times and limited flexibility.
• Active locomotion using magnetic actuation and localization is being explored to overcome WCE limitations.

Purpose of the Study:

• To develop and evaluate a motion control strategy for a robotic capsule enabling active locomotion in complex gastrointestinal (GI) environments.
• To enhance the efficiency and accuracy of WCE examinations through improved capsule maneuverability.

Main Methods:

• Design of a magnetic actuation system utilizing a four-electromagnetic coil module.
• Implementation of a real-time control strategy with online optimization of PID control parameters and current values using Adaptive Particle Swarm Optimization (APSO).
• Evaluation through simulations and experiments using irregular acrylic plates to mimic the GI tract.

Main Results:

• The proposed control methods demonstrated the potential for accurate and efficient intestinal inspection using active WCE.
• Successful navigation and control of the robotic capsule in simulated complex GI environments.

Conclusions:

• The developed magnetic actuation and control system can significantly improve the diagnostic accuracy and efficiency of GI tract examinations.
• This technology offers a promising integration for enhancing current WCE systems.