Electrical conductivity imaging using magnetic resonance tomography

被引:7
|
作者
Katscher, Ulrich [1 ]
Voigt, Tobias [2 ]
Findeklee, Christian [1 ]
机构
[1] Philips Res Europe Hamburg, Sect Med Imaging Syst, D-22335 Hamburg, Germany
[2] Univ Karlsruhe, Inst Biomed Engn, Karlsruhe, Germany
来源
2009 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-20 | 2009年
关键词
DIELECTRIC-PROPERTIES; CURRENT-DENSITY; BIOLOGICAL TISSUES; STEADY-STATE; IN-VIVO; FREQUENCY; SYSTEM; MREIT; FIELD; COIL;
D O I
10.1109/IEMBS.2009.5334031
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
The electrical conductivity of human tissue could be used as an additional diagnostic parameter or might be helpful for the prediction of the local SAR during MR measurements. In this study, the approach "Electric Properties Tomography" (EPT) is applied, which derives the patient's electric conductivity using a standard MR system. To this goal, the spatial transmit sensitivity distribution of the applied RF coil is measured. This sensitivity distribution represents the positive circularly polarized component of the magnetic field. It can be post-processed utilizing Faraday's and Ampere's law, yielding an estimation of the spatial distribution of the patient's electric conductivity. Thus, EPT does not apply externally mounted electrodes, currents, or RF probes. In this study, phantom experiments underline the principle feasibility of EPT. Furthermore, initial conductivity measurements in the brain allow distinguishing cerebro-spinal fluid from the surrounding grey and white matter.
引用
收藏
页码:3162 / 3164
页数:3
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