Modeling the non-stationary behaviour of time-varying bioimpedance |
|---|
| Benjamin Sanchez, Ebrahim Louarroudi, Rik Pintelon, Ramon Bragos |
- Abstract:
- The electrical bioimpedance (EBI) measurement of varying biological systems Z(&omega,t) (e.g. the heart, the lungs, …) by means of electrical impedance spectroscopy (EIS) remains an open challenge today. Briefly stated, the bioimpedance is widely assumed to be time-invariant when it is measured with the frequency sweep EIS approach. Hence, time-varying changes are thus ignored or treated as a noise source. In this work, we attempt to model the time-variant effects and obtain a simple (periodically) time-varying [(P)TV)] electrical circuit model with (P)TV parameters from experimental in vivo EBI data using the model proposed by Fricke- Morse. The aim is then to illustrate that a limited number of harmonic components of the electrical circuit parameters, which corresponds to an integer number of the bio-system periodicity, can be used to have a realistic evolution of the bioimpedance over time as well as in frequency.
- Keywords:
- electrical bioimpedance, Electrical Impedance Spectroscopy, Periodically Time-Varying bioimpedance
- Download:
- IMEKO-TC4-2013-093.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- TC4 Symposium 2013
- Title:
- 19th IMEKO TC4 Symposium Measurements of Electrical Quantities (together with 17th TC4 IWADC Workshop on ADC and DAC Modelling and Testing)
- Place:
- Barcelona, SPAIN
- Time:
- 18 July 2013 - 19 July 2013