Design of Endoscopic Capsule With Multiple Cameras

Area of Science:

• Medical Devices
• Gastroenterology
• Biomedical Engineering

Background:

• Wireless capsule endoscopy (WCE) systems face limitations in coverage, potentially leading to missed diagnoses.
• Existing WCE systems often have suboptimal power management and data transfer efficiency.

Purpose of the Study:

• To develop an improved endoscopic capsule system with multiple cameras to enhance gastrointestinal tract wall coverage.
• To reduce power consumption and data transfer bandwidth for extended capsule operation.

Main Methods:

• Implementation of a master-slave architecture with an efficient bus and four-level clock management for the Multiple Cameras Endoscopic Capsule (MCEC).
• Integration of a smart image capture strategy, including movement-sensitive control and camera selection, to optimize area coverage.
• Development and application of a low-complexity image compressor (PSNR 40.7 dB, 86% compression rate) to minimize data transfer and power usage.
• Design and fabrication of a dedicated chipset for the MCEC, leading to a six-camera endoscopic capsule prototype.

Main Results:

• The MCEC prototype achieved a gastrointestinal tract wall coverage rate of 98% using the smart image capture strategy.
• The system demonstrated significantly low power consumption, approximately 7.1 mW.
• The implemented image compressor achieved a compression rate of 86% with a PSNR of 40.7 dB.

Conclusions:

• The proposed Multiple Cameras Endoscopic Capsule (MCEC) system effectively increases diagnostic coverage in the gastrointestinal tract.
• The MCEC system offers a viable solution for reducing miss rates in wireless capsule endoscopy through enhanced imaging and power efficiency.
• The developed chipset and smart capture strategy contribute to a more effective and longer-lasting endoscopic capsule device.