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Induced Current Magnetic Resonance Electrical Impedance Tomography with z-Gradient Coil
Date
2013-08-26
Author
Eroğlu, Hasan Hüseyin
Eyüboğlu, Behçet Murat
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https://hdl.handle.net/11511/77449
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Magnetic Resonance Electrical Impedance Tomography (MREIT) is a medical imaging method that provides images of electrical conductivity at low frequencies (0-1 kHz). In MREIT, electrical current is applied to the body via surface electrodes and corresponding magnetic flux density is measured by means of Magnetic Resonance (MR) phase imaging techniques. By utilizing the magnetic flux density measurements and surface potential measurements images of true conductivity distribution can be reconstructed. In order...
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In this paper, induced current magnetic resonance electrical impedance tomography (ICMREIT) by means of current induction due to time-varying gradient fields of magnetic resonance imaging (MRI) systems is proposed. Eddy current and secondary magnetic flux density distributions are calculated for a numerical model composed of a z-gradient coil and a cylindrical conductor. An MRI pulse sequence is developed for the experimental evaluation of ICMREIT on a 3T MRI scanner. A relationship between the secondary ma...
Induced current magnetic resonance electrical impedance tomography (ICMREIT) with low frequency switching of gradient fields
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In this thesis, it is aimed to investigate induced current magnetic resonance electrical impedance tomography (ICMREIT) starting from modeling and analysis to experimental validation. Forward and inverse problems of ICMREIT are formulated. A magnetic resonance imaging (MRI) pulse sequence is proposed for the realization of ICMREIT using the slice selection (z) gradient coil of MRI scanners. Considering the proposed MRI pulse sequence, relationship between the low frequency (LF) MR phase and the secondary ma...
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H. H. Eroğlu and B. M. Eyüboğlu, “Induced Current Magnetic Resonance Electrical Impedance Tomography with z-Gradient Coil,” 2013, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/77449.