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Safety evaluation of human exposure using large-scale analysis based on ultra-high resolution body model in quasi-millimeter and millimeter wave bands

Research Project

Project/Area Number 21K04039
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 InstitutionKitami Institute of Technology

Principal Investigator

Taguchi Kenji  北見工業大学, 工学部, 准教授 (60435485)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords準ミリ波帯 / ミリ波帯 / 超高解像度人体ボクセルモデル / 人体ばく露 / 安全性評価 / 国際標準化 / SAR / APD / 全身平均SAR / 準ミリ波・ミリ波 / 超高解像度 / 大規模解析
Outline of Research at the Start

次世代移動通信で利用される準ミリ波・ミリ波帯の人体安全性評価指針は、国際規格団体によるガイドラインが発布されたが、安全側に基準値が設定されている。本研究では、超高解像度化技術を応用した解剖学に基づく高精細人体数値モデルと大規模な電磁界・熱の複合物理数値解析により、従来困難であった本周波数帯における人体電磁ばく露の評価指針と温度上昇との関連性を明らかにし、次世代無線通信の国際電波防護ガイドライン策定及び改訂に貢献することを目的としている。特に、安全性を考慮した最大許容送信電力を明確にすることで受信端末及び基地局を含めた通信システム設計の簡易化を促進するなど、産業界への波及効果も期待できる。

Outline of Final Research Achievements

In this study, the exposure evaluation of human body for electromagnetic fields with highly accurate in the quasi-millimeter wave and millimeter wave bands, which has been difficult in the past, by organically combining ultra-high resolution numerical models of the human body based on anatomy using high-resolution technology, and the large-scale electromagnetic field analysis technology using a parallel supercomputer. The importance of skin modeling and the quantitative influence of skin thickness on the evaluation guidelines in this frequency band are clarified for the first time through the evaluation of APD for local exposure and the whole-body average SAR for whole-body exposure. These are important scientific knowledge and data for the revision of international radio protection guidelines for next-generation wireless communications.

Academic Significance and Societal Importance of the Research Achievements

超高解像度化技術を応用した解剖学に基づく高精細人体数値モデルと大規模解析技術により、これまで数値解析が困難であった準ミリ波・ミリ波帯において体温上昇と関係が深い人体局所及び全身の電磁吸収解析を実現し、具体的な人体安全性の評価を世界に先駆けて実施したところに学術的意義がある。本研究により得られた知見及び数値データは、次世代無線通信の国際電波防護ガイドライン策定及び改訂のために有用であり、直接的には人体の安全性、間接的には通信速度の向上に大きく寄与出来ることが社会的意義となる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (9 results)

All 2024 2023 2022 2021

All Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results) Presentation (3 results) (of which Invited: 1 results)

  • [Journal Article] Computation of Whole-Body Average SAR in Realistic Human Models From 1 to 100 GHz2024

    • Author(s)
      Kodera Sachiko、Taguchi Kenji、Diao Yinliang、Kashiwa Tatsuya、Hirata Akimasa
    • Journal Title

      IEEE Transactions on Microwave Theory and Techniques

      Volume: 72 Issue: 1 Pages: 91-100

    • DOI

      10.1109/tmtt.2023.3289562

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Parameter variation effects on millimeter wave dosimetry based on precise skin thickness in real rats2023

    • Author(s)
      Kun Li, T. Hikage, H. Masuda, E. Ijima, A. Nagai, K. Taguchi
    • Journal Title

      Scientific Reports

      Volume: 13 Pages: 1-11

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Whole-Body Exposure System Using Horn Antennas With Dielectric Lens at 28 GHz2023

    • Author(s)
      S. Kodera, N. Miura, Y. Diao, M. Inoue, T. Hikage, K. Taguchi, H. Masuda, and A. Hirata
    • Journal Title

      IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology

      Volume: vol. 7 Issue: 1 Pages: 67-72

    • DOI

      10.1109/jerm.2022.3218812

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Calculated Epithelial/Absorbed Power Density for Exposure From Antennas at 10-90 GHz: Intercomparison Study Using a Planar Skin Model2023

    • Author(s)
      K. Li, S. Kodera, D. Poljak, Y. Diao, K. Sasaki, A. Susnjara, A. Prokop, K. Taguchi, J. Xi, S. Zhang, M. Yao, G. Sacco, M. Zhadobov, W. E. Hajj, and A. Hirata
    • Journal Title

      IEEE Access

      Volume: vol. 11 Pages: 7420-7435

    • DOI

      10.1109/access.2023.3238582

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 60GHz帯電波に対する生体影響の熱閾値評価のための空間合成型ばく露装置開発2022

    • Author(s)
      尾崎龍之介, 日景隆, 田口健治, 柏達也, 井上都, 増田宏, 石竹達也
    • Journal Title

      電気学会論文誌A

      Volume: vol. 142 Pages: 250-256

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Computation of Absorbed Power Densities in High-Resolution Head Models by Considering Skin Thickness in Quasi-Millimeter and Millimeter Wave Bands2022

    • Author(s)
      K. Taguchi, S. Kodera A. Hirata, T. Kashiwa
    • Journal Title

      IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology

      Volume: vol. 6 Issue: 4 Pages: 516-523

    • DOI

      10.1109/jerm.2022.3203576

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] RT法を用いた準ミリ波・ミリ波帯全身ばく露解析に関する一検討2021

    • Author(s)
      奥野紘平, 田口健治, 柏達也
    • Organizer
      令和3年度電気・情報関係学会北海道支部連合大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Computational Study on Temperature Elevation in Realistic Human Model for Whole-body Exposure2021

    • Author(s)
      S. Kodera, K. Taguchi, and A. Hirata
    • Organizer
      URSI GASS 2021
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 全身ばく露における温度上昇特性に対する皮膚モデリングの影響2021

    • Author(s)
      小寺紗千子, 田口健治, 平田晃正
    • Organizer
      電子情報通信学会 エレクトロニクスシミュレーション研究会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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