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Title: Two magnetic sensor based real-time tracking of magnetically inflated swallowable intragastric balloon
Authors: Miyasaka, Muneaki
Tiong, Anthony Meng Huat
Phan, Phuoc Thien
Huang, Yanpei
Kaan, Hung Leng
Ho, Khek Yu
Phee, Soo Jay
Keywords: Engineering::Mechanical engineering
Issue Date: 2021
Source: Miyasaka, M., Tiong, A. M. H., Phan, P. T., Huang, Y., Kaan, H. L., Ho, K. Y. & Phee, S. J. (2021). Two magnetic sensor based real-time tracking of magnetically inflated swallowable intragastric balloon. Annals of Biomedical Engineering, 49(7), 1735-1746.
Project: M4081419
Journal: Annals of Biomedical Engineering
Abstract: This paper presents a two magnetic sensor based tracking method for a magnetically inflated intragastric balloon capsule (MIBC) which is used for obesity treatment. After the MIBC is swallowed, it is designed to be inflated inside the stomach by approaching a permanent magnet (PM) externally near the abdomen. However, if the balloon inflation is accidentally triggered while the MIBC is still in the esophagus, the esophagus will be damaged. Therefore, to safely inflate the MIBC, we aim to track the MIBC's position along the esophagus and confirm the MIBC passes through. Typically, magnetic sensor based tracking systems tend to be bulky and costly since they involve computationally intensive optimization with many magnetic sensors. To solve those problems, we develop an algorithm that estimates the position of the PM inside the MIBC by using the grid search combined with the dynamically confined search range and search threshold modulation. Our tracking method achieved an average 1D position error of 3.48 mm which is comparable to the up to 4 mm average error for the other magnetic sensor based tracking systems that require more sensors and computational power compared to our system.
ISSN: 0090-6964
DOI: 10.1007/s10439-020-02716-5
Rights: ©2021 Biomedical Engineering Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

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