Physical Working Principles of Medical Radar

Author
Aardal, Øyvind
Paichard, Yoann
Brovoll, Sverre
Berger, Tor
Lande, Tor Sverre
Hamran, Svein-Erik
Date Issued
2013
Keywords
Ultralyd
Ekkokardiografi
Medisin
Permalink
http://publications.ffi.no/handle/123456789/478
DOI
10.1109/TBME.2012.2228263
Collection
Articles
Description
Aardal, Øyvind; Paichard, Yoann; Brovoll, Sverre; Berger, Tor; Lande, Tor Sverre; Hamran, Svein-Erik. Physical Working Principles of Medical Radar. IEEE Transactions on Biomedical Engineering 2013 ;Volum 60.(4) s. 1142-1149
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Abstract
There has been research interest in using radar for contactless measurements of the human heartbeat for several years. While many systems have been demonstrated, not much attention have been given to the actual physical causes of why this work. The consensus seems to be that the radar senses small body movements correlated with heartbeats, but whether only the movements of the body surface or reflections from internal organs are also monitored have not been answered definitely. There has recently been proposed another theory that blood perfusion in the skin could be the main reason radars are able to detect heartbeats. In this paper, an experimental approach is given to determine the physical causes. The measurement results show that it is the body surface reflections that dominate radar measurements of human heartbeats.
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