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Proceedings Paper

Optical remote sensing of heartbeats
Author(s): Juan Enrique Parra; German Da Costa
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Paper Abstract

Regions of the human body placed in the neighborhood of arteries or veins are periodically deflected by the passage of dilatation pulses and by body movements due to breathing. Remote, non-invasive measurement of the deflection is performed by means of optical techniques. The skin in the studied reign of the body is illuminated by a laser beam. The backscattered speckle pattern in recorded by a TV camera. The digitized images are numerically processed in order to determine the contrast of the light intensity distribution in each frame, which is a decreasing function of the instantaneous angular velocity of the reflected beam. The plot of time-integrated contrast vs. recording time is shown to closely resemble direct records of the angular deflection of the illuminated region. Also the breathing pattern is plotted in the same graphs.

Paper Details

Date Published: 23 August 2001
PDF: 9 pages
Proc. SPIE 4368, Visualization of Temporal and Spatial Data for Civilian and Defense Applications, (23 August 2001); doi: 10.1117/12.438115
Show Author Affiliations
Juan Enrique Parra, Univ. Simon Bolivar (Venezuela)
German Da Costa, Univ. Simon Bolivar (Venezuela)


Published in SPIE Proceedings Vol. 4368:
Visualization of Temporal and Spatial Data for Civilian and Defense Applications
Glenn O. Allgood; Nickolas L. Faust; Glenn O. Allgood, Editor(s)

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