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A localization method for wireless capsule endoscopy using side wall cameras and IMU sensor.

Seyed Shahim Vedaei1, Khan A Wahid2

  • 1Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, SK, S7N 5A9, Canada. shahim.vedaei@usask.ca.

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|May 28, 2021
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Summary
This summary is machine-generated.

This study introduces a new capsule localization method for the gastrointestinal (GI) tract using cameras and an Inertial Measurement Unit (IMU). The system accurately tracks capsule movement, unaffected by GI conditions, enabling precise medical interventions.

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Area of Science:

  • Biomedical Engineering
  • Medical Imaging
  • Robotics

Background:

  • Accurate localization of endoscopy capsules within the gastrointestinal (GI) system is crucial for diagnosing abnormalities and targeted medical delivery.
  • Existing methods often face challenges with the non-homogeneous GI environment and involuntary intestinal movements, limiting their effectiveness.

Purpose of the Study:

  • To develop and present a novel method for localizing endoscopy capsules within the human GI tract.
  • To enhance the accuracy and reliability of capsule tracking, independent of external factors or patient disturbances.

Main Methods:

  • Equipping the capsule with four side-wall cameras for movement measurement and a 9 Degree-Of-Freedom (DOF) Inertial Measurement Unit (IMU) for orientation and travel direction.
  • Utilizing low-resolution monochromatic cameras to capture actual capsule motion, filtering out involuntary small intestine movements.
  • Implementing a sensor fusion algorithm to integrate data from cameras and IMU for trajectory plotting.

Main Results:

  • The proposed system demonstrates robustness against challenging GI conditions, including non-homogeneous structures and involuntary bowel movements.
  • The method accurately derives the capsule's traveled path and plots its trajectory.
  • The system eliminates the need for external antennas or arrays, simplifying the procedure.

Conclusions:

  • The developed capsule localization technique offers a reliable and non-invasive solution for GI tract exploration.
  • This advancement facilitates precise GI abnormality tracking and medical delivery without disrupting patients' daily activities.