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Single Current Diffusion Tensor Magnetic Resonance Electrical Impedance Tomography: A Simulation Study
Date
2020-08-08
Author
Sadighi, Mehdi
Şişman, Mert
Açıkgöz, Berk Can
Eyüboğlu, Behçet Murat
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Diffusion Tensor Magnetic Resonance Electrical Impedance Tomography (DT-MREIT) is an imaging technique providing low-frequency conductivity tensor images. In all DT-MREIT applications in the literature two linearly independent current injection patterns are used to reconstruct the extra-cellular conductivity and diffusivity ratio () which is the space-dependent scale factor between and in a porous medium. In this study, a new approach is proposed to reconstruct using only one current injection pattern. The proposed method is evaluated using a simulated measurements with additive noise. The obtained results show similar performance compared to the conventional two current DT-MREIT.
URI
https://index.mirasmart.com/ISMRM2020/Login.php
https://hdl.handle.net/11511/72479
https://archive.ismrm.org/2020/3233.html
Conference Name
ISMRM & SMRT Virtual Conference & Exhibition, ( 8 - 14 Ağustos 2020)
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Department of Electrical and Electronics Engineering, Conference / Seminar
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Diffusion tensor magnetic resonance electrical impedance tomography (DT-MREIT) and its expansion to multi-physics multi-contrast magnetic resonance imaging
Sadighi, Mehdi; Eyüboğlu, Behçet Murat; Department of Electrical and Electronics Engineering (2021-6-01)
Diffusion tensor magnetic resonance electrical impedance tomography (DT-MREIT) is one of the emerging imaging modalities to obtain low-frequency anisotropic conductivity distribution employing diffusion tensor imaging (DTI) and magnetic resonance electrical impedance tomography (MREIT) techniques. DT-MREIT is based on the linear relationship between the conductivity and water self-diffusion tensors(C and D) in a porous medium. On the other hand, knowledge of the current density (J) distribution is used in m...
Induced Current Magnetic Resonance Electrical Impedance Tomography with z-Gradient Coil
Eroglu, Hasan H.; Eyuboglu, Murat (2014-08-30)
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...
Low-frequency conductivity tensor imaging with a single current injection using DT-MREIT
Sadighi, Mehdi; Şişman, Mert; Acikgoz, Berk C.; Eroglu, Hasan H.; Eyüboğlu, Behçet Murat (2021-03-01)
Diffusion tensor-magnetic resonance electrical impedance tomography (DT-MREIT) is an imaging modality to obtain low-frequency anisotropic conductivity distribution employing diffusion tensor imaging and MREIT techniques. DT-MREIT is based on the linear relationship between the conductivity and water self-diffusion tensors in a porous medium, like the brain white matter. Several DT-MREIT studies in the literature provide cross-sectional anisotropic conductivity images of tissue phantoms, canine brain, and th...
Induced Current Magnetic Resonance Electrical Conductivity Imaging With Oscillating Gradients
Eroglu, Hasan H.; Sadighi, Mehdi; Eyüboğlu, Behçet Murat (2018-07-01)
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...
Anisotropic Conductivity Imaging with MREIT Using J-substitution and Hybrid J-substitution Algorithms
Degirmenci, E.; Eyüboğlu, Behçet Murat (2009-09-12)
Magnetic Resonance Electrical Impedance Tomography (MREIT) is a tomographical imaging technique which uses measurements of magnetic flux density induced by a probing current to reconstruct electrical conductivity distribution within a conductor object with magnetic resonance active nuclei. In this study, two novel anisotropic conductivity reconstruction algorithms for MREIT are proposed. The technique is evaluated with simulated measurements.
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M. Sadighi, M. Şişman, B. C. Açıkgöz, and B. M. Eyüboğlu, “Single Current Diffusion Tensor Magnetic Resonance Electrical Impedance Tomography: A Simulation Study,” Sydney, Avustralya, 2020, vol. 1, Accessed: 00, 2021. [Online]. Available: https://index.mirasmart.com/ISMRM2020/Login.php.
