2015 Fiscal Year Final Research Report
Electromagnetic and thermal analysis by FDTD for MR safety of implantable medical devices
| Project/Area Number |
25350583
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Medical engineering assessment
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| Research Institution | Kobe University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KURODA Kagayaki 東海大学, 情報理工学部, 教授 (70205243)
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| Co-Investigator(Renkei-kenkyūsha) |
MATSUOKA Yuichiro 神戸大学, 医学系研究科, 医学研究員 (80372150)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 磁気共鳴診断装置 / MR安全性 / 勾配磁場 / RF磁場 / 有限要素法 / FDTD / 埋め込み型医療機器 / ペースメーカ |
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| Outline of Final Research Achievements |
Due to sophisticated high field MR and diversity of MR imaging sequence, it is important to consider mutual effect between implantable medical device and magnetic field. The effects were displacement force, torque, heating, artifacts, vibration of device, the influence of exogenous potential and rectification according to ASTM and IEC/TS 10974. Heating effect by gradient magnetic field was considered smaller than the effect by RF field. However, there were not clear safety standards of effects on the nervous system but by heating. In this study, we performed basic analysis of the heating induced by gradient magnetic field in a 34-years-old male adult model (Duke) with a MR compatible cardiac pacemaker. The results showed that no substantial risk for heating with low frequency gradient magnetic field. However, It requires a careful analysis of heating, unintended cardiac stimulation and Lolentz force caused by the loop circuit formed with the pacemaker, the lead and the organ.
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| Free Research Field |
医用システム工学，医用画像処理
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