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Real-time location estimation technique for in-body devices using advanced human body phantom

Research Project

Project/Area Number 18K04123
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21020:Communication and network engineering-related
Research InstitutionChiba University

Principal Investigator

Takahashi Masaharu  千葉大学, フロンティア医工学センター, 准教授 (70267342)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords位置推定 / カプセル内視鏡 / 電磁波 / 受信信号強度 / 人体ファントム / 体内無線電力伝送 / 体内アンテナ / リアル人体ファントム / 角度補正 / ヘリカルアンテナ / 脂肪・筋肉・大腸・小腸ファントム / 無線電力伝送 / 体内デバイス
Outline of Final Research Achievements

The purpose of this study is to estimate the position of the capsule endoscope in real time, and the algorithm is developed. The distance is calculated based on the received signal strength of multiple receiving antennas on the body surface, and the average of the intersection points of the hemispheres according to the distance is used as the estimated position. The error was improved by using a correction surface that considers the angular characteristics of the antennas. In addition, it is necessary to determine the orientation of the capsule endoscope in the process of position estimation. To solve this problem, we proposed a discrimination method using variance.
Using an abdominal model based on MRI images, position estimation was performed at 78 locations in the small intestine region. As a result, 92% of the analytical results and 90% of the measured results were acceptable, confirming the usefulness of the proposed algorithm.

Academic Significance and Societal Importance of the Research Achievements

人体は複数の組織で構成されており,その電気的特性も組織により異なっている。従来,位置推定する場合は,時間または位相情報を用いており,その測定には高精度なシステムが必要な上,複雑な組織構造では位置推定誤差が大きくなる。本研究では,受信信号強度を用いるため,簡易なシステムでできる上,複雑な構造でも推定誤差が大きくならない。また,提案したアルゴリズムは,簡易なためリアルタイムで位置推定が可能である。そのため,カプセル内視鏡の位置がリアルタイムで分かるため,患部の位置がすぐに判明できる。さらに,今後,カプセル内視鏡のロボット化などに伴い,不足する電力の送電や,コントロール信号の送信などにも活用できる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (18 results)

All 2021 2020 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (16 results) (of which Int'l Joint Research: 9 results,  Invited: 2 results)

  • [Journal Article] Measurement of capsule endoscopy position with the transmitting and receiving antennas for WPT2021

    • Author(s)
      Nakamura Shogo、Yoshida Kyohei、Hiyoshi Daijiro、Takahashi Masaharu
    • Journal Title

      IEICE Communications Express

      Volume: 10 Issue: 3 Pages: 149-154

    • DOI

      10.1587/comex.2020XBL0176

    • NAID

      130007993755

    • ISSN
      2187-0136
    • Year and Date
      2021-03-01
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Localization Method Using Received Signal Strength for Wireless Power Transmission of the Capsule Endoscope2019

    • Author(s)
      Daijiro Hiyoshi, Tasaharu Takahashi
    • Journal Title

      IEICE Transactions on Communications

      Volume: E102.B Issue: 8 Pages: 1660-1667

    • DOI

      10.1587/transcom.2018EBP3328

    • NAID

      130007686449

    • ISSN
      0916-8516, 1745-1345
    • Year and Date
      2019-08-01
    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Position estimation for the capsule endoscope with algorithm considered angle character of receiving antenna2020

    • Author(s)
      A.Yoshitake, K.Yoshida and M.Takahashi
    • Organizer
      2020 International Conference on Emerging Technologies for Communications (ICETC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Wireless power transmission for the capsule endoscope by use of a simple human body model2020

    • Author(s)
      K.Yoshida and M.Takahashi
    • Organizer
      2020 International Conference on Emerging Technologies for Communications (ICETC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高精細数値人体モデルにおけるカプセル内視鏡の3次元位置推定2020

    • Author(s)
      佐々木凛太郎,高橋応明
    • Organizer
      電子情報通信学会 信学技報
    • Related Report
      2019 Research-status Report
  • [Presentation] 高精細人体モデルを用いたカプセル内視鏡の位置推定と実測2020

    • Author(s)
      佐々木凜太郎,高橋応明
    • Organizer
      2020年電子情報通信学会総合大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Location estimation technique for in-body devices using RSS2019

    • Author(s)
      M.Takahashi
    • Organizer
      2019 URSI-Japan Radio Science Meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Measurement of the localization for wireless power transmission to the capsule endoscopy2019

    • Author(s)
      S.Nakamura, D.Hiyoshi, K.Yoshida and M.Takahashi
    • Organizer
      2019 International Symposium on Antennas an Propagation
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Position estimation of capsule endoscope using high-definition numerical human body model2019

    • Author(s)
      R.Sasaki and M.Takahashi
    • Organizer
      2019 International Symposium on Antennas an Propagation
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Analysis of power transmission efficiency of capsule endoscope antenna2019

    • Author(s)
      K.Yoshida and M.Takahashi
    • Organizer
      Asian Wireless Power Transfer Workshop 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 簡易腹部モデルを使用したカプセル内視鏡の位置推定の実測2019

    • Author(s)
      中村匠吾,日吉大二朗,吉田享平,高橋応明
    • Organizer
      電子情報通信学会 信学技報
    • Related Report
      2019 Research-status Report
  • [Presentation] カプセル内視鏡における無線電力伝送用送受電アンテナの開発2019

    • Author(s)
      吉田享平,高橋応明
    • Organizer
      電子情報通信学会 信学技報
    • Related Report
      2019 Research-status Report
  • [Presentation] 高精細数値人体モデルを用いたカプセル内視鏡の位置推定2019

    • Author(s)
      佐々木凜太郎,高橋応明
    • Organizer
      2019年電子情報通信学会ソサイエティ大会
    • Related Report
      2019 Research-status Report
  • [Presentation] カプセル内視鏡への無線電力伝送のための位置推定の実測2019

    • Author(s)
      中村匠吾, 吉田享平, 高橋応明
    • Organizer
      2019年電子情報通信学会総合大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Development of localization method corresponding to both polarized waves in a capsule endoscope2018

    • Author(s)
      D.Hiyoshi and M.Takahashi
    • Organizer
      2018 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Antennas for wireless power transmission of capsule endoscope2018

    • Author(s)
      M.Takahashi
    • Organizer
      2018 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Capsule localization method corresponding to both polarized waves for wireless power transmission2018

    • Author(s)
      D.Hiyoshi and M.Takahashi
    • Organizer
      Asian Wireless Power Transfer Workshop 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 人体内アンテナ2018

    • Author(s)
      高橋応明
    • Organizer
      2018年電子情報通信学会ソサイエティ大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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