| Project/Area Number |
15K20585
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Orthodontics/Pediatric dentistry
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| Research Institution | Tokyo Medical and Dental University |
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Principal Investigator |
IMAI Haruki 東京医科歯科大学, 歯学部, 非常勤講師 (80735837)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | MRI / アーチファクト / 反磁性 / MRIアーチファクト / 磁化率 |
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| Outline of Final Research Achievements |
MRI diagnosis is often perturbed by susceptibility artifacts when metals are implanted or fixed in the human body.To reduce the artifacts,combination of metallic materials with diamagnetic substance may be an effective approach.Since the direction of magnetization for paramagnetic and diamagnetic substances are opposite,artifacts could be cancelled by each other.To clarify the effectiveness of this method,we performed the following experiments.1)Fabricating Zr-Ag composites and evaluating their magnetic properties.2)Covering orthodontic metal brackets by alginate impression material formulated with carbon powder.3)Three dimensional quantification of MRI artifacts by several shape of metals in same volume.From the results of them,it was suggested that this combination method was effective for the reduction of susceptibility artifacts,and the state of combination between paramagnetic and diamagnetic substances may be important.
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