![](/images/graphics-bg.png)
Noninvasive Measurement of Conductivity Anisotropy at Larmor Frequency Using MRI
Joint Authors
Kim, Dong-Hyun
Seo, Jin Keun
Lee, Joonsung
Song, Yizhuang
Choi, Narae
Cho, Sungmin
Source
Computational and Mathematical Methods in Medicine
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-03-11
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
Anisotropic electrical properties can be found in biological tissues such as muscles and nerves.
Conductivity tensor is a simplified model to express the effective electrical anisotropic information and depends on the imaging resolution.
The determination of the conductivity tensor should be based on Ohm's law.
In other words, the measurement of partial information of current density and the electric fields should be made.
Since the direct measurements of the electric field and the current density are difficult, we use MRI to measure their partial information such as B1 map; it measures circulating current density and circulating electric field.
In this work, the ratio of the two circulating fields, termed circulating admittivity, is proposed as measures of the conductivity anisotropy at Larmor frequency.
Given eigenvectors of the conductivity tensor, quantitative measurement of the eigenvalues can be achieved from circulating admittivity for special tissue models.
Without eigenvectors, qualitative information of anisotropy still can be acquired from circulating admittivity.
The limitation of the circulating admittivity is that at least two components of the magnetic fields should be measured to capture anisotropic information.
American Psychological Association (APA)
Lee, Joonsung& Song, Yizhuang& Choi, Narae& Cho, Sungmin& Seo, Jin Keun& Kim, Dong-Hyun. 2013. Noninvasive Measurement of Conductivity Anisotropy at Larmor Frequency Using MRI. Computational and Mathematical Methods in Medicine،Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-470941
Modern Language Association (MLA)
Lee, Joonsung…[et al.]. Noninvasive Measurement of Conductivity Anisotropy at Larmor Frequency Using MRI. Computational and Mathematical Methods in Medicine No. 2013 (2013), pp.1-12.
https://search.emarefa.net/detail/BIM-470941
American Medical Association (AMA)
Lee, Joonsung& Song, Yizhuang& Choi, Narae& Cho, Sungmin& Seo, Jin Keun& Kim, Dong-Hyun. Noninvasive Measurement of Conductivity Anisotropy at Larmor Frequency Using MRI. Computational and Mathematical Methods in Medicine. 2013. Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-470941
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-470941