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Evaluation of RF heating on nonmagnetic leads during MR procedures and comparisons with electoromagnetic simulation

Research Project

Project/Area Number 26460731
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Medical Physics and Radiological Technology
Research InstitutionTsukuba International University

Principal Investigator

Muranaka Hiroyuki  つくば国際大学, 医療保健学部, 教授(移行) (20608468)

Research Collaborator YABE Hitoshi  埼玉県立リハビリテーションセンター
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
KeywordsMRI Safety / RF heating / Non-magnetic Leads / Simulation / MRI safety / Risk management / インプラントRF発熱 / 電磁界解析
Outline of Final Research Achievements

This study is the evaluation of RF heating by the arrangement of two kinds of nonmagnetic lead wires during MRI examination. Imaging conditions were changed based on the actual placement of DBS leads and RF heating was measured with a fluorescent optical fiber thermometer using the ASTM phantom (F2182-02a). Although the risk of RF heating is small under the specified conditions, it was confirmed that the risk of RF heating is large under excessive RF irradiation. We compared SAR which is the RF heating index with B1 + rms. SAR increase is proportional to the RF heating at the lead tip, B1 + rms is proportional to the square. In the electromagnetic field analysis results, when the lead is placed on the right side of the phantom, the RF irradiation is the counterclockwise (CCW) is larger than when the RF irradiation is clockwise (CW). The special attention is required for B1 + rms which is RF heating index of the implant when there is excessive RF irradiation compared to SAR.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (9 results)

All 2017 2016 2015 2014

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 4 results,  Acknowledgement Compliant: 1 results) Presentation (4 results) (of which Invited: 4 results) Book (1 results)

  • [Journal Article] Increased amygdala reactivity following early life stress: a potential resilience enhancer role.2017

    • Author(s)
      Yamamoto T, Toki S, Siegle GJ, Takamura M, Takaishi Y, Yoshimura S, Okada G, Matsumoto T, Nakao T, Muranaka H, Kaseda Y, Murakami T, Okamoto Y, Yamawaki S
    • Journal Title

      BMC psychiatry

      Volume: 17 Issue: 1 Pages: 1-11

    • DOI

      10.1186/s12888-017-1201-x

    • NAID

      120006814094

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Experimental occlusal interference on brain activation during gum chewing.2017

    • Author(s)
      大塚剛郎,笹栗 健一,林勇太,山田健太郎,村中博幸,他
    • Journal Title

      Biomedical Research

      Volume: 28 Pages: 453-458

    • Related Report
      2016 Annual Research Report
    • Open Access
  • [Journal Article] 平仮名および片仮名の文字刺激処理における脳賦活部位の検討ーfunctional MRIを用いてー2017

    • Author(s)
      高山みさき,大西英雄,城本修,村中博幸
    • Journal Title

      音声言語医学

      Volume: 58 Pages: 143-151

    • NAID

      130006865579

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] MRI検査のリスクと安全性2014

    • Author(s)
      村中博幸,坂野康昌,中村修
    • Journal Title

      医療保健学研究

      Volume: 5 Pages: 1-13

    • NAID

      110009828183

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 体内金属埋め込み患者のMRI検査の現状と対策2017

    • Author(s)
      村中博幸
    • Organizer
      第39回千葉MRIセミナー
    • Place of Presentation
      船橋市立医療センター
    • Year and Date
      2017-02-04
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] 最新のMRI安全性について2016

    • Author(s)
      村中博幸
    • Organizer
      第23回茨城県MRI情報交換会
    • Place of Presentation
      筑波メディカルセンター
    • Year and Date
      2016-10-20
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] MRI検査におけるインプラントのRF発熱2016

    • Author(s)
      村中博幸
    • Organizer
      第43回山形県MR研究会
    • Place of Presentation
      山形大学医学部附属病院
    • Year and Date
      2016-06-25
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] MRI検査におけるインプラントのRF発熱2015

    • Author(s)
      村中博幸
    • Organizer
      第62回関東支部研究発表大会
    • Place of Presentation
      長野県長野市南石堂町1346
    • Year and Date
      2015-12-12
    • Related Report
      2015 Research-status Report
    • Invited
  • [Book] 内科臨床誌メディチーナ CT・MRI”戦略的”活用ガイド2014

    • Author(s)
      村中博幸(共著)
    • Publisher
      医学書院
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2018-03-22  

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