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Segers, P., Rietzschel, E.R., De Buyzere, M.L., Vermeersch, S.J., De Bacquer, D., Van Bortel, L.M., De Backer, G., Gillebert, T.C. and Verdonck P.R. (2007) Noninvasive (input) impedance, pulse wave velocity, and wave reflection in healthy middle-aged men and women. Hypertension, 49, 1248-1255. doi:10.1161/HYPERTENSIONAHA.106.085480

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• TITLE: An investigation using high-precision CCD laser displacement sensor to measure body surface motion induced by heartbeat

  AUTHORS: Satoshi Suzuki, Takemi Matsui, Takafumi Asao, Kentaro Kotani

  KEYWORDS: Unconstrained Sensing; Heart Rate; Body Surface; Motion

  JOURNAL NAME: Journal of Biomedical Science and Engineering, Vol.5 No.11, November 27, 2012

  ABSTRACT: The aim of this study was to measure the motion of the body surface induced by heartbeat by using a high-precision laser sensor in order to provide a reference for other research on medical remote sensing techniques that are unconstrained and non-contact. Body surface motions at some points on the chest and on the dorsal region were measured for eight men with a laser displacement sensor. For comparison, an electrocardiograph was also used to monitor the heartbeat. As a result, we confirmed cyclic motion of about 0.1 mm in amplitude everywhere on the body surface, not only from the front of the body but also from the back and the neck. In contrast, which part on the body was most suitable for measurement had to be taken into account because a difference in motion amplitudes was observed in different parts on the body. The amplitude of the motions also depended on the conditions of the body surface as well as underneath the skin. These results show the possibility of acquiring information about heartbeats from anywhere on the body by using an unconscious sensing technique, and the potential for the technique to monitor the condition of the body and personal physical characteristics.