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Magnetic resonance - electrical impedance tomography
Date
2006-01-01
Author
Eyüboğlu, Behçet Murat
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URI
https://hdl.handle.net/11511/83721
Journal
WILEY - Encyclopedia of Biomedical Engineering
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Unverified, Article
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Magnetic Resonance - Electrical Impedance Tomography (MR-EIT) Research at METU
Eyüboğlu, Behçet Murat (2006-09-01)
Following development of magnetic resonance current density imaging (MRCDI), magnetic resonance - electrical impedance tomography (MR-EIT) has emerged as a promising approach to produce high resolution conductivity images. Electric current applied to a conductor results in a potential field and a magnetic flux density distribution. Using a magnetic resonance imaging (MRI) system, the magnetic flux density distribution can be reconstructed as in MRCDI. The flux density is related to the current density distr...
Magnetic imaging of ferromagnetic domains by room temperature scanning hall probe microscopy using GaAs/AlGaAs and bismuth micro-hall probes
Sandhu, A.; Masuda, H.; Oral, Ahmet; Bending, S.J.; Inushima, T. (2002-01-01)
Heterostructure GaAs/AlGaAs and bismuth (Bi) micro-Hall probes were integrated into a room temperature scanning Hall probe microscope system (RT-SHPM) for imaging localized magnetic fluctuations at the surfaces of floppy disks, crystalline garnet thin films, and strontium ferrite permanent magnets. At a drive current of 800 μA the sensitivity of the Bi micro-probes was 0.38 G/√ Hz and comparable with the GaAs/AlGaAs probes. Bi nano-Hall probes with an active region of 200 nm × 200 nm were fabricated by focu...
Magnetic properties and hyperfine interactions of Co1-2xNixMnxFe2O4 nanoparticles
Baykal, A.; Eryiğit, Sümeyra; TOPKAYA, RAMAZAN; GÜNGÜNEŞ, HAKAN; Amir, Md.; YILDIZ, AYLİN; Kurtan, U.; Shirsath, Sagar E. (2017-04-15)
Col-2xNixMnxFe2O4 (0.0 <= x <= 0.5) nanoparticles (NPs) were prepared via citrate assisted microwave combustion route. XRD analysis confirmed the cubic structure (spinel) of all samples. Average crystallite size of products (obtained from (311) diffraction line) was in the range of 32.9-43.4 nm. The intense peak appearing at around 531 cm(-1) in FT-IR was attributed to the formation of a spinel ferrite. Magnetic properties of the products were investigated by room temperature vibrating sample magnetometer a...
Magnetic source images of human brain functions
Gençer, Nevzat Güneri; Williamson, SJ (1997-02-01)
The advent of large arrays of superconducting magnetic field sensors makes it possible to properly sample the topography of the magnetic field pattern across the human scalp with a temporal resolution of a few milliseconds. These capabilities can be exploited for computing a best estimate of the spatiotemporal evolution of electrical currents within coherently active neural populations distributed across the cerebral cortex. Data from 200 sensors can be interpreted by the method of singular value decomposit...
ELECTRICAL-IMPEDANCE TOMOGRAPHY USING INDUCED CURRENTS - AN EXPERIMENTAL-STUDY
Gençer, Nevzat Güneri (1993-11-06)
The theory behind induced current EIT is summarized. A prototype data acquisition system is described which is realized to verify the theoretical studies. Data collected from a two-dimensional (2D) object distribution is compared with the calculated data obtained by the finite element method. It is shown that the data acquisition system is capable of collecting real data which closely follows the theoretically expected perturbation in boundary potential differences. Images reconstructed by real data sets ar...
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B. M. Eyüboğlu, “Magnetic resonance - electrical impedance tomography,”
WILEY - Encyclopedia of Biomedical Engineering
, pp. 2154–2162, 2006, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/83721.