人体组织电特性磁共振断层成像（MR EPT）技术进展

doi:10.3969/j.issn.0258-8021.2015.01.012

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Abstract It has been demonstrated that electrical properties, such as the conductivity and permitivity, are usually very different between healthy and tumor tissues. Therefore, the in vivo measurement of electrical properties may be a potential method for the early detection of cancers. In principle, the magnetic resonance imaging (MRI) system is the interaction between the nonionized electromagnetic field, including strong static magnetic field, gradient magnetic field, and radiofrequency field, and the human tissues, thus the information of electrical properties is definitely embedded inside the MRI. Recently developed
technigue of in vivo magnetic resonance electrical property tomography (MR EPT) of human tissues are exactly the
technigue for the in vivo extraction of electrical properties from tissues. This paper introduces the background of MR EPT, analytically deduces the quantitatively relationship between the MRI radiofrequency field and the electrical properties of tissues based on the Maxwell’s equations, which are the governing equations for the description of the behaviors of electromagnetic fields inside tissues. The efficacy, deficiency and potentials of the MR EPT technique at 3 T and 7 T are respectively analyzed according to the international updated progress. The preliminary clinical research of in vivo measurement of electrical properties of healthy and tumor tissues using MR EPT technique is summarized, showing the promising future of this cuttingedge technique.

Key words： electrical properties of biological tissues magnetic resonance electrical properties tomography (MR EPT) of human tissues magnetic resonance radiofrequency(MR RF) early detection of cancer

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	Xin Xuegang¹
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Xin Xuegang^1,2#*. Technological Progresses of the Magnetic Resonance Electrical Property Tomography of Human Tissues[J]. journal1, 2015, 34(1): 83-90.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2015.01.012 OR http://cjbme.csbme.org/EN/Y2015/V34/I1/83

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