Open AccessExperimental investigation into radar‐based central blood pressure estimation
Author(s) -
Solberg Lars Erik,
Aardal Øyvind,
Berger Tor,
Balasingham Ilangko,
Fosse Erik,
Hamran SveinErik
Publication year - 2015
Publication title -
iet radar, sonar and navigation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.489
H-Index - 82
eISSN - 1751-8792
pISSN - 1751-8784
DOI - 10.1049/iet-rsn.2014.0206
Subject(s) - clutter , radar , imaging phantom , radius , proxy (statistics) , geology , acoustics , computer science , remote sensing , physics , optics , telecommunications , computer security , machine learning
To assess whether radar technology can be used for monitoring blood pressure via information from the aorta, two experiments were performed: (i) measurements on a phantom model and (ii) acquisitions on a human subject for in vivo experiments. A linear dependency of phase on radius in the radar echoes in the phantom model showed that the information regarding the radius of a circular, cylindrical object depended on the clutter environment: in a low‐clutter case two distinct reflections were identified, whereas in the high‐clutter case it was possible to extract a proxy. Radar echoes from antennas strapped to the back of a human subject showed a clear signature from a discernible, distinct reflector believed to be the aorta. However, as for the high‐clutter case, only a proxy for aortic radius is available as basis for estimation, which is most likely coupled with aortic displacements.