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Published (Version of Record)CC BY V4.0, Open Access
Journal article
In-water electrical impedance tomography: EIT and the sea
Physiological measurement, Vol.46(3), 03NT01
2025
PMID: 39970539
Abstract
Objective
Electrical impedance tomography (EIT) has shown the ability to provide clinically useful functional information on ventilation in humans and other land mammals. We are motivated to use EIT with sea mammals and human divers, since EIT could provide unique information on lung ventilation that can help address diver performance and safety, and veterinary and behavioral questions. However, in-water use of EIT is challenging, primarily because sea water is more conductive than the body.
Approach
We first address this issue by modeling the in-water component and evaluating image reconstruction algorithms. Main results. EIT is able to produce reasonable images if an outer insulating layer allows a water layer thickness <2% of the body radius. We next describe the design of custom EIT belts with an outer neoprene insulator to minimize current leakage. We show example underwater EIT recordings in human and dolphin subjects. Significance. We demonstrate in-water EIT is feasible with appropriate techniques.
Details
- Title
- In-water electrical impedance tomography: EIT and the sea
- Authors/Creators
- Andy Adler - Carleton UniversityTarek El Harake - Carleton UniversityMartina Mosing - Anaesthesiology and Perioperative Intensive Care, Department for Companion Animals and Horses, Vetmeduni Vienna, Veterinärplatz 1, Wien, 1210, AUSTRIAAndreas Fahlman - Oceanografic Foundation, Eduardo Primo Yúfera (Científic), 1B., Valencia, 46013, SPAIN
- Publication Details
- Physiological measurement, Vol.46(3), 03NT01
- Publisher
- IOP Publishing Ltd
- Number of pages
- 9
- Grant note
- ONR: N000142312002
ONR Award #: N000142312002.
- Identifiers
- 991005745019207891
- Copyright
- ©2025 The Author(s)
- Murdoch Affiliation
- Centre for Sustainable Aquatic Ecosystems
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 8 Earth Sciences
- 8.212 Sensors & Tomography
- 8.212.1753 Electrical Impedance Tomography
- Web Of Science research areas
- Biophysics
- Engineering, Biomedical
- Physiology
- ESI research areas
- Biology & Biochemistry