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Development of a Biocompatible Structural Color type Sensor to Identify "Good" or "Bad" Forceps Grasping Conditions

Research Project

Project/Area Number 21K18090
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 90130:Medical systems-related
Research InstitutionKagawa National College of Technology

Principal Investigator

Maeda Yusaku  香川高等専門学校, 機械工学科, 講師 (00803404)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2021: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords構造色 / 機械学習 / 生体医工学 / 低侵襲治療 / 触覚センサ / 畳み込みニューラルネットワーク / CNN / 把持 / 鉗子 / 軟性内視鏡 / 物理センサ / センサ / 無線計測 / 深層学習
Outline of Research at the Start

内視鏡治療などでは医師が視覚しか得られず,鉗子の扱いなど,「治療技術の習熟」が困難であるなどの課題があり,鉗子把持状態の“良悪”など,医師が必要な情報を提示可能な技術が求められている。本研究では,取得する情報に応答するセンサの構造色を,内視鏡カメラで取得する,“構造色式センサ”を生体適合性材料のみで実現し,生体適合と多様な計測を両立した計測技術の実現を目指す。加えて,センサで取得した鉗子の把持力・摩擦力分布から,現在明確な数値指針がない把持状態の“良悪”を判別するモデル構築の実現を目指す。

Outline of Final Research Achievements

(1) Development of biocompatible structural color type sensor elements: We established a manufacturing process for biocompatible structural color-type sensors by combining mechanical structure formation by optical 3D printing, mirror surface formation by film polishing, and 1um-level gap control technology by crimping.
(2) Construction of a machine learning model for "good/bad" evaluation of grasping condition: Using convolutional neural networks, we have realized a model linking the time-series waveform of load, which is 1D data, and human sensation.
(3) Verification of operation in an biological environment: We demonstrated that there is no problem in measuring information by structural color even in a glycerin environment. We demonstrated that there is no problem in measuring information by structural color even in a glycerin environment with a viscosity of 1499 mPas, which is sufficiently larger than the viscosity of gastric juice of 40 mPas or less.

Academic Significance and Societal Importance of the Research Achievements

生体適合型構造色式センサと,内視鏡カメラの組み合わせによる計測は単一の内視鏡視野から複数の情報を,同時に取得可能であり,構造的には,現行の内視鏡構成に対してセンサチップの追加のみで実現できる。一般的なアプローチである,無線素子および生体適合性を有するためのパッケージを使用する場合に比べ,実装体積を小さくでき,多様な計測への拡張性の高い技術である。加えて,取得データによる感性的な情報の取得は,難易度の高い内視鏡治療の習得を少しでも早くし,治療法自体の波及を早める貢献が期待できる。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (4 results)

All 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Neural-Network-Based Tactile Perception System Using Ultrahigh-Resolution Tactile Sensor2023

    • Author(s)
      Maeda Yusaku、Tanimoto Kei、Sasayama Kenichi、Takao Hidekuni
    • Journal Title

      IEEE Transactions on Haptics

      Volume: - Issue: 4 Pages: 1-6

    • DOI

      10.1109/toh.2023.3269797

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 内視鏡環境における構造色式完全無線センサ2022

    • Author(s)
      前田 祐作,宅和 宏樹,中川 智明,森 宏仁,高尾 英邦
    • Journal Title

      Medical Science Digest

      Volume: 48(3) Pages: 46-49

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 構造物ヘルスモニタリングに向けた構造色式荷重センサの製作工程の確立2022

    • Author(s)
      佐柄雅人,前田祐作,高尾英邦
    • Organizer
      第39回「センサ・マイクロマシンと応用システム」シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Design and manufacture of structural color type 3-axis tactile sensor for organ grasping and slip detection of medical forceps2021

    • Author(s)
      Hirose Umi, Yusaku Maeda, and Hidekuni Takao
    • Organizer
      The 4th NIT-NUU Bilateral Academic Conference
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2024-01-30  

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