22 November 2000 Photoplethysmography imaging: a new noninvasive and noncontact method for mapping of the dermal perfusion changes
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Abstract
This paper presents the experimental setup and preliminary results of a CCD based Photoplethysmographic Imager (PPGI) which has been shown to be capable to assess various disorders of the peripheral venous system by standard test methods derived from the classical photophethysmographic practice in a noninvasive and non-contact way. The PPGI is a computer- based CCD imaging system to visualize the skin vessels and analyze the local changes of dermal blood volume. Our results show that this system performs as well as the currently available commercial PPG system by adding information of spatial distribution which allows the investigation of locations and causes of vascular disorders. Both the venous hemodynamics and arterial perfusion can be mapped in two dimensions.
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Ting Wu, Vladimir Blazek, Hans Juergen Schmitt, "Photoplethysmography imaging: a new noninvasive and noncontact method for mapping of the dermal perfusion changes", Proc. SPIE 4163, Optical Techniques and Instrumentation for the Measurement of Blood Composition, Structure, and Dynamics, (22 November 2000); doi: 10.1117/12.407646; https://doi.org/10.1117/12.407646
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