Abstract
Electrodes are commonly used to inject current into the human body in various biomedical applications such as functional electrical stimulation, defibrillation, electrosurgery, RF ablation, impedance imaging, and so on. When a highly conducting electrode makes direct contact with biological tissues, the induced current density has strong singularity along the periphery of the electrode, which may cause painful sensation or burn. Especially in impedance imaging methods such as the magnetic resonance electrical impedance tomography, we should avoid such singularity since more uniform current density underneath a current-injection electrode is desirable. In this paper, we study an optimal geometry of a recessed electrode to produce a well-distributed current density on the contact area under the electrode. We investigate the geometry of the electrode surface to minimize the edge singularity and produce nearly uniform current density on the contact area. We propose a mathematical framework for the uniform current density electrode and its optimal geometry. The theoretical results are supported by numerical simulations.
| Original language | English |
|---|---|
| Article number | 075004 |
| Journal | Inverse Problems |
| Volume | 27 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2011 Jul 1 |
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All Science Journal Classification (ASJC) codes
- Theoretical Computer Science
- Signal Processing
- Mathematical Physics
- Computer Science Applications
- Applied Mathematics
Cite this
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Optimal geometry toward uniform current density electrodes. / Song, Yizhuang; Lee, Eunjung; Woo, Eung Je; Seo, Jin Keun.
In: Inverse Problems, Vol. 27, No. 7, 075004, 01.07.2011.Research output: Contribution to journal › Article
TY - JOUR
T1 - Optimal geometry toward uniform current density electrodes
AU - Song, Yizhuang
AU - Lee, Eunjung
AU - Woo, Eung Je
AU - Seo, Jin Keun
PY - 2011/7/1
Y1 - 2011/7/1
N2 - Electrodes are commonly used to inject current into the human body in various biomedical applications such as functional electrical stimulation, defibrillation, electrosurgery, RF ablation, impedance imaging, and so on. When a highly conducting electrode makes direct contact with biological tissues, the induced current density has strong singularity along the periphery of the electrode, which may cause painful sensation or burn. Especially in impedance imaging methods such as the magnetic resonance electrical impedance tomography, we should avoid such singularity since more uniform current density underneath a current-injection electrode is desirable. In this paper, we study an optimal geometry of a recessed electrode to produce a well-distributed current density on the contact area under the electrode. We investigate the geometry of the electrode surface to minimize the edge singularity and produce nearly uniform current density on the contact area. We propose a mathematical framework for the uniform current density electrode and its optimal geometry. The theoretical results are supported by numerical simulations.
AB - Electrodes are commonly used to inject current into the human body in various biomedical applications such as functional electrical stimulation, defibrillation, electrosurgery, RF ablation, impedance imaging, and so on. When a highly conducting electrode makes direct contact with biological tissues, the induced current density has strong singularity along the periphery of the electrode, which may cause painful sensation or burn. Especially in impedance imaging methods such as the magnetic resonance electrical impedance tomography, we should avoid such singularity since more uniform current density underneath a current-injection electrode is desirable. In this paper, we study an optimal geometry of a recessed electrode to produce a well-distributed current density on the contact area under the electrode. We investigate the geometry of the electrode surface to minimize the edge singularity and produce nearly uniform current density on the contact area. We propose a mathematical framework for the uniform current density electrode and its optimal geometry. The theoretical results are supported by numerical simulations.
UR - http://www.scopus.com/inward/record.url?scp=79959714635&partnerID=8YFLogxK
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U2 - 10.1088/0266-5611/27/7/075004
DO - 10.1088/0266-5611/27/7/075004
M3 - Article
AN - SCOPUS:79959714635
VL - 27
JO - Inverse Problems
JF - Inverse Problems
SN - 0266-5611
IS - 7
M1 - 075004
ER -