Detection of Weak Magnetic Fields Induced by Electrical Currents with MRI : Theoretical and Practical Limits of Sensitivity
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概要
- 論文の詳細を見る
Detection of weak magnetic fields induced by neuronal electrical activities with magnetic resonance imaging (MRI) is a potentially effective method for functional imaging of the brain. In this study, we compared the theoretical and practical limits of sensitivity for detecting weak magnetic fields with a columnar phantom. The theoretical limit of sensitivity was estimated from signal and noise intensities in magnetic resonance images. The theoretical limit of sensitivity was approximately 10-8T. The practical limit was 10 times the theoretical limit. The dependence of the theoretical limit of sensitivity on acquisition parameters, such as the repetition time (TR), echo time (TE), number of pixels, and spectral width, was quantitatively evaluated. The results indicated the existence of an optimal value in TE/T2*.
- 日本磁気共鳴医学会の論文
- 2005-03-31
著者
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UENO Shoogo
Department of Biomedical Engineering, Graduate School of Medicine, University of Tokyo
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Ueno Shoogo
Department Of Biomedical Engineering Graduate School Of Medicine University Of Tokyo
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Sekino Masaki
Department Of Biomedical Engineering Graduate School Of Medicine University Of Tokyo
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HATADA Tomohisa
Department of Biomedical Engineering, Graduate School of Medicine, University of Tokyo
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Hatada Tomohisa
Department Of Biomedical Engineering Graduate School Of Medicine University Of Tokyo
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Ueno Shoogo
Department Of Applied Quantum Physics Graduate School Of Engineering Kyushu University
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