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Current Density Imaging Using Directly Measured Harmonic Bz Data in MREIT
Joint Authors
Source
Computational and Mathematical Methods in Medicine
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-03-20
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Magnetic resonance electrical impedance tomography (MREIT) measures magnetic flux density signals through the use of a magnetic resonance imaging (MRI) in order to visualize the internal conductivity and/or current density.
Understanding the reconstruction procedure for the internal current density, we directly measure the second derivative of Bz data from the measured k-space data, from which we can avoid a tedious phase unwrapping to obtain the phase signal of Bz.
We determine optimal weighting factors to combine the derivatives of magnetic flux density data, ∇2Bz, measured using the multi-echo train.
The proposed method reconstructs the internal current density using the relationships between the induced internal current and the measured ∇2Bz data.
Results from a phantom experiment demonstrate that the proposed method reduces the scanning time and provides the internal current density, while suppressing the background field inhomogeneity.
To implement the real experiment, we use a phantom with a saline solution including a balloon, which excludes other artifacts by any concentration gradient in the phantom.
American Psychological Association (APA)
Park, Chunjae& Kwon, Oh In. 2013. Current Density Imaging Using Directly Measured Harmonic Bz Data in MREIT. Computational and Mathematical Methods in Medicine،Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-467579
Modern Language Association (MLA)
Park, Chunjae& Kwon, Oh In. Current Density Imaging Using Directly Measured Harmonic Bz Data in MREIT. Computational and Mathematical Methods in Medicine No. 2013 (2013), pp.1-9.
https://search.emarefa.net/detail/BIM-467579
American Medical Association (AMA)
Park, Chunjae& Kwon, Oh In. Current Density Imaging Using Directly Measured Harmonic Bz Data in MREIT. Computational and Mathematical Methods in Medicine. 2013. Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-467579
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-467579