Numerical Convergence of 3D Electrode Models used in Electrical Impedance Tomography
| Autor: | Olavo Luppi Silva, Raul Gonzalez Lima |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
0206 medical engineering 02 engineering and technology Mechanics 020601 biomedical engineering 01 natural sciences Finite element method 010101 applied mathematics Control and Systems Engineering Electrode Electric potential 0101 mathematics Electrical impedance tomography Voltage drop |
| Zdroj: | IFAC-PapersOnLine. 51:30-35 |
| ISSN: | 2405-8963 |
| DOI: | 10.1016/j.ifacol.2018.11.603 |
| Popis: | Electrical Impedance Tomography is a technique that creates a medical image from measurements of electric potential taken at the skin. It depends on the accurate modelling of the voltage drop that happens due to transduction of electronic flow into ionic flow at electrode/skin interface. In this work, two of the existing electrode models (Nodal and Prismatic) were implemented and compared to two other proposed models. One of them (Pyramidal) is a variation of Prismatic model and the other (Patacon) is new, based on a finite element model with “thick” blocks representing electrode/skin interface. A qualitative study and a convergence analysis were conducted to compare the performance of the models. It was found that both proposed models converge and that they present electric potentials consistently above Prismatic model. Additionally, potentials estimated by Patacon model are consistently smaller than Pyramidal model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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