Development of high frequency current induced magnetic tomography technology

• Project/Area Number: 26630190
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Measurement engineering
• Research Institution: Kitasato University
• Principal Investigator: KUMAGAI HIROSHI 北里大学, 医療衛生学部, 教授 (00211889)
• Co-Investigator(Kenkyū-buntansha): 根武谷 吾 北里大学, 医療衛生学部, 准教授 (00276180)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 磁気 / トモグラフィ / 電流誘導

Outline of Final Research Achievements

By integrating electrical impedance CT technology, magnetic measurement technology, and laser technology, we aimed to develop a system that acquires conductivity distribution in vivo as a tomographic image in a safe, noninvasive, noncontact manner that could not be realized so far. We first proposed a current induced magnetic tomography method, developed a water bath phantom experiment system of 1 kHz 8 channel current induced magnetic tomography, succeeded in imaging the conductivity distribution in aquarium, possibility of current induced magnetic tomography Could be shown. Next, we developed a noncontact current injection device, studied high frequency characteristics of the sensor necessary for integration with a high frequency optically pumped atomic magnetometer, succeeded in high sensitivity observation of magnetic flux density change at 100 kHz.

Research Products

• [Journal Article] Increase of Nuclear Magnetic Resonance Signal in Ultra-low-field by Hyperpolarization of ¹³¹Xe by Spin-exchange Optical Pumping (2017)
  • Author(s): 武田 俊, 熊谷 寛
  • Journal Title: IEEJ Transactions on Electronics, Information and Systems Volume: 137 Issue: 4 Pages: 604-606
  • DOI: 10.1541/ieejeiss.137.604
  • NAID: 130005530155
  • ISSN: 0385-4221, 1348-8155
  • Peer Reviewed
• [Journal Article] Feasible method for chest shape estimation used for a wearable electrical impedance tomography (2016)
  • Author(s): 一二三奏, 根武谷吾, 熊谷寛
  • Journal Title: Iryou kikigaku (The Japanese journal of medical instrumentation) Volume: 86 Issue: 5 Pages: 450-458
  • DOI: 10.4286/jjmi.86.450
  • NAID: 130005279592
  • ISSN: 1882-4978, 1884-054X
  • Peer Reviewed
• [Journal Article] A case of lung recruitment confirmed with electrical impedance tomography (EIT) (2016)
  • Author(s): 岩下義明, 根武谷吾, 小池朋孝, 今井寛
  • Journal Title: Journal of the Japanese Society of Intensive Care Medicine Volume: 23 Issue: 6 Pages: 675-676
  • DOI: 10.3918/jsicm.23.675
  • NAID: 130005268295
  • ISSN: 1340-7988, 1882-966X
  • Peer Reviewed
• [Journal Article] 電気インピーダンストモグラフィ(EIT)で肺の換気分布を見える化！ (2016)
  • Author(s): 根武谷吾
  • Journal Title: 呼吸器ケア Volume: 14(1) Pages: 94-98
• [Journal Article] 電流誘導磁気トモグラフィー技術 (2015)
  • Author(s): 熊谷 寛、根武谷 吾、鈴木 英行
  • Journal Title: 電気学会研究会資料 Volume: 15 Pages: 13-16
  • Acknowledgement Compliant
• [Presentation] 電気インピーダンス法による細胞の凍結解凍後の生死判別に関する基礎的検討 (2017)
  • Author(s): 横関滉平、須藤康子、根武谷吾、氏平政伸、熊谷 寛
  • Organizer: 電気学会 光・量子デバイス研究会
  • Place of Presentation: 芝浦工業大学（東京都江東区）
  • Year and Date: 2017-04-21
• [Presentation] 電気インピーダンスCTを用いた脈波伝搬速度測定法の検討 (2017)
  • Author(s): 玉利勇賢、根武谷吾、熊谷 寛
  • Organizer: 電気学会 光・量子デバイス研究会
  • Place of Presentation: 芝浦工業大学（東京都江東区）
  • Year and Date: 2017-04-21
• [Presentation] 高感度原子磁気センサの高周波特性 (2017)
  • Author(s): 中武 光、武田 俊、熊谷 寛、根武谷吾
  • Organizer: 電気学会 光・量子デバイス研究会
  • Place of Presentation: 芝浦工業大学（東京都江東区）
  • Year and Date: 2017-04-21
• [Presentation] モジュール型光ポンピング原子磁気センサの開発 (2017)
  • Author(s): 武田 俊、熊谷 寛、中武 光
  • Organizer: 電気学会 光・量子デバイス研究会
  • Place of Presentation: 芝浦工業大学（東京都江東区）
  • Year and Date: 2017-04-21
• [Presentation] Theoretical analysis of lateral resolution given by annular super-resolution phase plate (2017)
  • Author(s): Kumagai H., Iketaki Y., Nagai K., and Bokor N.
  • Organizer: SPIE 10070, Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XXIV
  • Place of Presentation: The Moscone Center (San Francisco, USA)
  • Year and Date: 2017-01-30
  • Int'l Joint Research
• [Presentation] Laser polarized Xe NMR and MRI at ultra-low magnetic fields (2017)
  • Author(s): Takeda S. and Kumagai H.
  • Organizer: SPIE 10068, Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues XV
  • Place of Presentation: The Moscone Center (San Francisco, USA)
  • Year and Date: 2017-01-30
  • Int'l Joint Research
• [Presentation] Electrical Impedance Tomography (EIT) - EITの概要とその有用性 - (2017)
  • Author(s): 根武谷吾
  • Organizer: 第9回呼吸機能イメージング研究会学術集会
  • Place of Presentation: 京都大学百周年時計台記念館（京都市左京区）
  • Year and Date: 2017-01-28
  • Invited
• [Presentation] Simple monitoring methods of respiration using wearable sensors (2016)
  • Author(s): Nebuya S., Koike T., Kumagai H.
  • Organizer: Life Engineering Symposium 2016
  • Place of Presentation: 大阪国際交流センター（大阪市天王寺区）
  • Year and Date: 2016-11-05
• [Presentation] Pressure control of the simulated vascular access circuit (2016)
  • Author(s): Iwata Y., Inaoka H., Nebuya S., Kumagai H.
  • Organizer: Life Engineering Symposium 2016
  • Place of Presentation: 大阪国際交流センター（大阪市天王寺区）
  • Year and Date: 2016-11-05
• [Presentation] Feasible method for chest shape estimation used for EIT (2016)
  • Author(s): Nebuya S, Hifumi S., Kumagai H., Brown BH.
  • Organizer: XVII Conference on Electrical Impedance Tomography (EIT)
  • Place of Presentation: Karolinska Institutet(Stockholm, Sweden)
  • Year and Date: 2016-06-21
  • Int'l Joint Research
• [Presentation] 体幹形状モニタリング技術の医療・ヘルスケア領域への展開 (2016)
  • Author(s): 根武谷 吾
  • Organizer: 第55回 日本生体医工学会大会
  • Place of Presentation: 富山国際会議場（富山県富山市）
  • Year and Date: 2016-04-28
• [Presentation] EIT装置を用いた生体組織解凍過程の３次元モニタリング (2016)
  • Author(s): 横関滉平、根武谷吾、氏平政伸、熊谷 寛
  • Organizer: 電気学会 光・量子デバイス研究会
  • Place of Presentation: 電気通信大学（東京都調布市）
  • Year and Date: 2016-04-22
• [Presentation] 核スピン偏極による極低磁場MRIの核磁気共鳴信号の増大 (2016)
  • Author(s): 武田 俊、熊谷 寛
  • Organizer: 電気学会 光・量子デバイス研究会
  • Place of Presentation: 電気通信大学（東京都調布市）
  • Year and Date: 2016-04-22
• [Presentation] 集中治療室における肺機能評価を実現するウェアラブルEITの開発 (2015)
  • Author(s): 根武谷吾, 小池朋孝, 岩下義明, 熊谷寛, 相馬一亥, 新井正康, 今井寛
  • Organizer: 生体医工学シンポジウム2015
  • Place of Presentation: 岡山県、岡山市、岡山理科大学
  • Year and Date: 2015-09-25
• [Presentation] A wearable electrical impedance tomography system - Its features and clinical application - (2015)
  • Author(s): Nebuya S, Koike T, Imai H, Iwashita Y, Kumagai H, Soma K, Arai M, Brown BH
  • Organizer: 16th International Conference in Electrical Impedance Tomography
  • Place of Presentation: スイス、ヌーシャテル、スイス連邦工科大学
  • Year and Date: 2015-06-02
  • Int'l Joint Research
• [Presentation] ウェアラブル電気インピーダンストモグラフィに有用な胸郭形状推定法 (2015)
  • Author(s): 一二三奏, 根武谷吾, 熊谷寛
  • Organizer: 電気学会 光・量子デバイス研究会
  • Place of Presentation: 神奈川県、相模原市、北里大学
  • Year and Date: 2015-04-24
• [Presentation] 電流誘導磁気トモグラフィー技術 (2015)
  • Author(s): 熊谷 寛、根武谷 吾、鈴木 英行
  • Organizer: 電気学会 光・量子デバイス研究会
  • Place of Presentation: ゆふいん七色の風（大分県由布市）
  • Year and Date: 2015-01-26 – 2015-01-27