Special Issue "Bioimpedance Sensors: Instrumentation, Models, and Applications"
Deadline for manuscript submissions: 28 February 2021.
Interests: bioimpedance; sensors and sensing; signals and signal processing; impedance spectroscopy; impedance tomography; electronic design; wearable devices
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The scientific approach to electrical impedance of chemical and biological environments has already been explored for more than a century. During the first decades of the last century, Peter Debye and Hugo Fricke derived a mathematical treatment for the frequency dependence of electrochemical and bioelectrical impedance. Since then, thousands of scientists and engineers have further developed both a theoretical understanding and a practical treatment of electrical bioimpedance. Their results are believed to be greatly promising for practical applications, especially in experimental biology and medicine.
We have experienced successful implementations of bioimpedance-based sensing technology in rate adaptive cardiac pacemakers, in cardiopulmonary analyzers and lung tomography devices, cell counters and analyzers. Unfortunately, the results of these were not as convincingly successful as expected. This is highly concerning. The implementation process has slowed down, for the following reasons.
First, we do not know enough about the distribution of electrical current in living tissues with variable parameters changing due to breathing, heart beating, blood oxygenation and circulation. Second, we do not know enough about the spectral and spatial distribution of the permittivity in living structures and their capacitive characteristics. Third, we do not know enough about the role of magnetic properties of tissues on their electrical impedance.
From an engineering point of view, we need more efficient configurations of sensing electrodes and materials in this respect, especially for microelectrodes. Contactless sensing methods and circuits are of interest. The deeper developed signal processing and data handling methods, together with including artificial intelligence algorithms, can give impressive results when it comes to obtaining new data, information and knowledge about living organisms.
Above highlighted and other theoretical and experimental developments, leading to practical implementations, are welcome in the Special Issue.
Prof. Dr. Mart Min
Manuscript Submission Information
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- electrical bioimpedance
- sensing and sensors
- living tissues
- electrical and magnetic properties
- current distribution
- spectral properties
- signals and data processing
- measurement methods
- practical implementations