Abstract
Current density imaging (CDI) is able to visualize a three-dimensional current density distribution J inside an electrically conducting subject caused by an externally applied current. CDI may use a magnetic resonance imaging (MRI) scanner to measure the induced magnetic flux density B and compute J via the Ampere law J = 1/μ0∇ × B. However, measuring all three components of B = (Bx, By, Bz) has a technical difficulty due to the requirement of orthogonal rotations of the subject inside the MRI scanner. In this work, we propose a new method of reconstructing a current density image using only Bz data so that we can avoid the subject rotation procedure. The method utilizes an auxiliary injection current to compensate the missing information of Bx and By. The major advantage of the method is its applicability to a subject with an anisotropic conductivity distribution. Numerical experiments show the feasibility of the new technique.
| Original language | English |
|---|---|
| Pages (from-to) | 3183-3196 |
| Number of pages | 14 |
| Journal | Physics in medicine and biology |
| Volume | 50 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - 2005 Jul 7 |
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All Science Journal Classification (ASJC) codes
- Radiological and Ultrasound Technology
- Radiology Nuclear Medicine and imaging
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Identification of current density distribution in electrically conducting subject with anisotropic conductivity distribution. / Hyun, Chan Pyo; Kwon, Ohin; Jin, Keun Seo; Eung, Je Woo.
In: Physics in medicine and biology, Vol. 50, No. 13, 07.07.2005, p. 3183-3196.Research output: Contribution to journal › Article
TY - JOUR
T1 - Identification of current density distribution in electrically conducting subject with anisotropic conductivity distribution
AU - Hyun, Chan Pyo
AU - Kwon, Ohin
AU - Jin, Keun Seo
AU - Eung, Je Woo
PY - 2005/7/7
Y1 - 2005/7/7
N2 - Current density imaging (CDI) is able to visualize a three-dimensional current density distribution J inside an electrically conducting subject caused by an externally applied current. CDI may use a magnetic resonance imaging (MRI) scanner to measure the induced magnetic flux density B and compute J via the Ampere law J = 1/μ0∇ × B. However, measuring all three components of B = (Bx, By, Bz) has a technical difficulty due to the requirement of orthogonal rotations of the subject inside the MRI scanner. In this work, we propose a new method of reconstructing a current density image using only Bz data so that we can avoid the subject rotation procedure. The method utilizes an auxiliary injection current to compensate the missing information of Bx and By. The major advantage of the method is its applicability to a subject with an anisotropic conductivity distribution. Numerical experiments show the feasibility of the new technique.
AB - Current density imaging (CDI) is able to visualize a three-dimensional current density distribution J inside an electrically conducting subject caused by an externally applied current. CDI may use a magnetic resonance imaging (MRI) scanner to measure the induced magnetic flux density B and compute J via the Ampere law J = 1/μ0∇ × B. However, measuring all three components of B = (Bx, By, Bz) has a technical difficulty due to the requirement of orthogonal rotations of the subject inside the MRI scanner. In this work, we propose a new method of reconstructing a current density image using only Bz data so that we can avoid the subject rotation procedure. The method utilizes an auxiliary injection current to compensate the missing information of Bx and By. The major advantage of the method is its applicability to a subject with an anisotropic conductivity distribution. Numerical experiments show the feasibility of the new technique.
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U2 - 10.1088/0031-9155/50/13/015
DO - 10.1088/0031-9155/50/13/015
M3 - Article
C2 - 15972989
AN - SCOPUS:21344455541
VL - 50
SP - 3183
EP - 3196
JO - Physics in Medicine and Biology
JF - Physics in Medicine and Biology
SN - 0031-9155
IS - 13
ER -