Alexei A. Kamshilin
Institute of Automation and Control Processes of Far Eastern Branch of the Russian Academy of Sciences, 690041, Vladivostok, Russia
Title of Talk
“Quantitative assessment of microcirculation parameters in clinical setting by camera-based plethysmography”
Camera-based (imaging) photoplethysmography (cbPPG) is a fast-growing technology capable for monitoring of human vital signs in remote and low-cost manner. Although the physiological model behind cbPPG is still under discussion, recent experiments demonstrate that this technology is highly promising for quantitative assessment of microcirculation parameters. In experimental studies carried out by our group, we use a cdPPG system that operates under green illumination and consists of a monochrome camera, the recording of frames in which is synchronized with the electrocardiogram recording. This configuration, together with the original image processing, allows us to achieve high sensitivity measurements of the optical modulation associated with the heartbeats, while significantly suppressing motion artifacts. In this talk, I will overview a range of novel cbPPG applications, including the intra-operative monitoring of cerebral microcirculation, the visualization of skin capillary function across the body, assessing the circulatory-system reactivity in response to functional testing, evaluating the functional reserve of cerebral and musculocutaneous vessels, instrumental identification of scleroderma, and the contactless assessment of endothelial function.
Alexei A. Kamshilin received his MD from the Leningrad State University in 1974, PhD from the A.F. Ioffe Physical Technical Institute (Leningrad, USSR) in 1982, and Dr. Sci. from the S.I. Vavilov State Optical Institute (St. Petersburg, Russia) in 1995. His academic carrier started in 1974 in Russia, continued in Brazil in 1990 to 1992, and since 1992 he was researching and teaching in different universities of Finland. From 2004 to 2014, he was a professor at the University of Eastern Finland (Kuopio). From 2015 to 2020, he was a professor at the ITMO University (St. Petersburg, Russia). Since 2020, he is a Chief Scientist in the Institute of Automation and Control Processes of the Far Eastern Branch of the Russian Academy of Sciences (Vladivostok, Russia). His research interest includes nonlinear and coherent optics, photorefractive and photogalvanic effects, optical sensors technology, adaptive interferometry and multispectral imaging, optical methods for biomedical diagnostics, and biomedical imaging. In these fields, he has published over 250 papers in peer-reviewed journals.