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A wireless narrowband imaging chip for capsule endoscope.

Lan-Rong Dung, Yin-Yi Wu

IEEE Transactions on Biomedical Circuits and Systems

|July 16, 2013

Summary

This study introduces the first wireless capsule endoscope with narrowband imaging (NBI) technology for early gastrointestinal cancer detection. The device utilizes a novel dual-mode CMOS sensor, improving diagnostic capabilities for neoplasms.

Area of Science:

Biomedical Engineering
Medical Imaging
Gastroenterology

Background:

Narrowband imaging (NBI) enhances early detection of gastrointestinal neoplasms.
Existing wireless capsule endoscopes lack NBI technology.
Challenges include NBI image acquisition and power management in capsule endoscopes.

Purpose of the Study:

To develop and present the first wireless capsule endoscope incorporating NBI technology.
To improve early diagnosis of gastrointestinal cancers.
To overcome technical challenges in NBI capsule endoscope design.

Main Methods:

Development of a dedicated dual-mode CMOS sensor capable of both white-light and NBI.
Integration of the sensor into a wireless capsule endoscope with an RF transmitter.

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Power consumption optimization for extended battery life.

Main Results:

The proposed 512 × 512 CMOS sensor achieves low power consumption (2 mA at 3 V).
The NBI capsule operates for 6–8 hours on two button batteries with an average current of 7–8 mA.
Experimental results demonstrate significantly improved image quality compared to commercial capsule endoscopes.

Conclusions:

The developed NBI capsule endoscope is the first of its kind on the market.
The device offers enhanced diagnostic capabilities for early gastrointestinal cancers.
The dual-mode CMOS sensor design effectively addresses NBI acquisition and power dissipation challenges.