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On sensitivity in transfer impedance measurements

Fred J. Pettersen

Fred J. Pettersen

  • Department of Clinical and Biomedical Engineering, Oslo University Hospital HFOslo, Norway
  • Department of Physics, University of OsloOslo, Norway
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Pettersen, Fred J.
  
31. Dez. 2018
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Online veröffentlicht: 31. Dez. 2018
Seitenbereich: 159 - 162
Eingereicht: 15. Dez. 2018
DOI: https://doi.org/10.2478/joeb-2018-0020
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© 2018 F.J. Pettersen published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig.1

Current density vector plots for the three models, starting with model A at the top followed by model B and C. The red vectors are CC current densities and the blue vectors are reciprocal current densities.
Current density vector plots for the three models, starting with model A at the top followed by model B and C. The red vectors are CC current densities and the blue vectors are reciprocal current densities.

Fig.2

Sensitivity field plots for the three models, starting with model A at the top followed by model B and C. The red regions represent positive sensitivity while the blue regions represent negative sensitivity. The absolute value is higher the stronger the color is.
Sensitivity field plots for the three models, starting with model A at the top followed by model B and C. The red regions represent positive sensitivity while the blue regions represent negative sensitivity. The absolute value is higher the stronger the color is.

Fig.3

Volume impedance density field plots for the three models, starting with model A at the top followed by model B and C. The red regions represent positive volume impedance density while the blue regions represent negative volume impedance density. The absolute value is higher the stronger the color is.
Volume impedance density field plots for the three models, starting with model A at the top followed by model B and C. The red regions represent positive volume impedance density while the blue regions represent negative volume impedance density. The absolute value is higher the stronger the color is.

Electrical properties of the materials used in FEM simulations_

MaterialConductivity (S/m)Resistivity (Ωm)
lowConductivity0.110
mediumConductivity11
highConductivity100.1

Simulated impedances and associated perceptivities for the three models_ Units for perceptivities are left out since we are considering change in phenomena which can be non-physical changes_

ParameterModel AModel BModel C
Sim. 112.645 Ω12.645 Ω10.985 Ω
Sim. 211.736 Ω11.736 Ω10.076 Ω
Sim. 313.545 Ω13.545 Ω11.885 Ω
Sim. 412.545 Ω12.545 Ω10.885 Ω
Ψm-3.636-3.636-3.636
Ψg3.6003.6003.600
Ψ-0.400-0.400-0.400
Ψrm-0.288-0.288-0.331
Ψrg0.2660.2660.303
Ψr-0.032-0.032-0.036
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Englisch
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Fachgebiete der Zeitschrift:
Technik, Bioingenieurwesen, Biomedizinische Elektronik, Biologie, Biophysik, Medizin, Biomedizinische Technik, Physik, Spektroskopie und Metrologie
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