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Related Concept Videos

Endoscopic Procedures III: Video Capsule Endoscopy01:28

Endoscopic Procedures III: Video Capsule Endoscopy

Capsule endoscopy, or wireless or video capsule endoscopy, is a diagnostic procedure for examining the entire gastrointestinal tract. Patients swallow a capsule about the size of a vitamin tablet. The capsule is equipped with a transmitter, a battery, an LED light source, and a color video camera to capture images throughout the gastrointestinal tract. This procedure is particularly useful for diagnosing conditions such as Crohn's disease, ulcerative colitis, tumors, polyps, ulcers, unexplained...

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Published on: September 27, 2018

A Wireless Capsule Endoscope System With Low-Power Controlling and Processing ASIC.

Xinkai Chen, Xiaoyu Zhang, Linwei Zhang

    IEEE Transactions on Biomedical Circuits and Systems
    |July 16, 2013
    PubMed
    Summary

    This study introduces a wireless capsule endoscope system featuring a low-power ASIC. Optimized design with local image compression reduces energy consumption for transmitting image frames by 45%.

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    Area of Science:

    • Biomedical Engineering
    • Electronic Engineering
    • Medical Imaging

    Background:

    • Wireless capsule endoscopy offers a minimally invasive diagnostic tool.
    • Existing systems face challenges in power consumption, miniaturization, and efficient data transmission.
    • Need for improved power management and data processing within the capsule.

    Purpose of the Study:

    • To design and develop a low-power wireless capsule endoscope system.
    • To address challenges in power reduction, miniaturization, and wireless wake-up.
    • To improve energy efficiency for image frame transmission.

    Main Methods:

    • Designed a system integrating a CMOS image sensor, RF transceiver, and a low-power Application Specific Integrated Circuit (ASIC).
    • Employed an optimized system architecture with an integrated image compression module, Power Management Unit (PMU), and a novel wireless wake-up subsystem.
    • Fabricated the ASIC using 0.18-μm CMOS technology with a die area of 3.4 mm × 3.3 mm.

    Main Results:

    • The ASIC operates at a low power supply (down to 0.95 V) with a power dissipation of 1.3 mW.
    • The developed prototype capsule demonstrated successful operation.
    • Local image compression resulted in an average of 45% energy reduction for transmitting image frames.

    Conclusions:

    • The proposed wireless capsule endoscope system effectively reduces power consumption.
    • Optimized system architecture and local image compression are key to energy efficiency.
    • The design facilitates the development of more compact and power-efficient endoscopic devices.